The pollen tube will form, but it will not be directed toward the egg to be fertilised.
When the haploid megaspore nucleus divides, an embryo sac is said to form. It has two haploid nuclei and six haploid cells with no cell walls. In some cases, the haploid nuclei join together to form a single cell (endosperm motor cell). At the time of fertilisation, one male nucleus and one egg nucleus combine to form a zygote, which leads to the development of the embryo. The primary endosperm nucleus and the second male nucleus fuse to form the endosperm nucleus. A pollen tube develops into one of the female gametophyte's two synergid cells during the angiosperm fertilisation process.
Cell death occurs in the synergid cell into which the pollen tube grows, either before or after the pollen tube enters this cell. Synergid cells direct pollen tube growth toward the female gametophyte and aid in tube entry into the embryo sac.
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In pea plants, round seeds (R) are dominant to wrinkled seeds (r). A genetic cross of two plants, one homozygous dominant, one homozygous recessive for the seed shape trait occurs.
what percentage of offspring would have round seeds?
100% of the off spring of dominant homozygous and recessive homozygous parent for the particular trait will be round shaped.
What are homozygous and heterozygous alleles?Differ in the number of genes. These control our physical characteristics and health. Each variation is called an allele. Her two alleles of each gene are inherited from both parents.
Homozygosity is a term in the field of genetics that describes two identical copies of alleles within a DNA gene sequence that encodes a particular trait. We inherit genetic material from our father and mother, so not all double strands of DNA are exactly the same. Homozygosity can occur throughout her DNA in an organism replicating through two parental cells. We all have two alleles/versions, of each gene. Being homozygous for a particular gene means that we inherit two identical versions. , is the opposite of the heterozygous genotype with different alleles.
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What is the object in the middle with a coil of wire wrapped around a metal shaft?
A magnet in which the magnetic field is produced by an electric current is known as an electromagnet. Usually wound into a coil, the wire used to create an electromagnet.
What sort of magnet is an electromagnet?Devices with electric motors like electric fans and doorbells are examples of electromagnetic . The clapper is drawn to the electromagnet of a doorbell, which strikes the bell and causes it to ring. An electric motor converts electrical energy into kinetic energy by means of an electromagnet.
what are electromagnets?One definition of an electromagnet is a magnet that runs on electricity. An electromagnet's strength, unlike that of a permanent magnet, may be altered by varying the amount of current passing through it.
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ascending pathways conduct sensory information upward toward the brain, typically through a relay chain of 3 successive neurons. the neurons in these sensory pathways are called the first-order, second-order and third-order neurons, respectively. select the true statement regarding first-order neurons in somatosensory pathways.
Ascending pathways in ganglions, which contain the cell bodies of first-order neurons, transmit sensory data to the brain, typically via a relay chain of three succeeding neurons.
What exactly are neurons and what do they do?The fundamental constituents of the brain are neuronal cells, commonly referred to as neurones or nerve cells. They are indeed the cells in charge of absorbing sensory data from the environment, directing our muscles with motor commands, and transforming and relaying electrical impulses at each step along the route.
Are neurons restricted to the brain?The brain's neurons are the cells responsible for transmitting and receiving electrical and chemical messages. They serve as the brain's building blocks and carry signals to all of the body's tissues, muscles, and other neurons.
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if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
secondary type of succession would follow, if a forest fire destroys the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact.
The life cycle of a plant is characterized by secondary ecological forest fire succession. Secondary succession, as opposed to the first, primary succession, is a process initiated by an event (e.g. forest fire, harvesting, hurricane, etc.) massive wildfires were raging. The alterations that occurred after the California fires are an illustration of secondary succession. The sequence of alterations known as secondary succession take place in an environment that has been disrupted but where soil and organisms are still present.
The complete question is
If a forest fire destroyed the vegetation in an area, but left some vestiges of the previously functioning community and the soil intact, what type of succession would follow?
a. primary
b. secondary
c. tertiary
d. quaternary
e. quinary
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Of the following chromosomal abnormalities, which type is most likely to be viable in humans?
A. Trisomy
B. Haploidy
C. Monosomy
D. Triploidy
Answer: It is A
Explanation: I have my ways ;>
in a phylogeny, information about relatedness is portrayed by the pattern of branching, not by the order of taxa at the tips of the tree.
On a phylogeny, the number of nodes separating two taxa indicates how closely related they are.
What are taxa ?A given taxon typically includes several taxa of lower rank. Taxa are arranged in a hierarchy from kingdom to subspecies. Certain taxonomic categories, which are listed in descending order and include kingdom, phylum (in plants, division), class, order, family, genus, species, and subspecies or race, are universally accepted for the classification of protists, plants, and animals.
Kingdom, phylum, class, order, family, genus, and species are the orderly groups, going from largest to smallest. 2. Each level is referred to as a taxon (plural: taxa) or taxonomic category in taxonomic nomenclature.
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How many of the following can be used to distinguish a nematode worm from an annelid worm?1. type of body cavity2. number of muscle layers in the body wall3. presence of segmentation4. number of embryonic tissue layers5. shape of worm in cross-sectional view a) one of theseb) two of thesec) three of thesed) five of these
Sort of body hollow space three of these is the subsequent can be used to distinguish a nematode bug from an annelid worm.
Further to a greater specialized complete digestive machine, annelid worms have also developed frame capabilities now not found in flatworms or nematodes. those functions seem in some shape in all larger, greater complex animals a coelom, a frame hollow space among the digestive tube and the outside body wall this is lined with tissue.
crucial morphological identification characters in nematodes consist of the shape of the head, the number of annuals, frame length, length of the stylet, the shape of stylet knob, the structure of lateral fields, presence/absence, and form of the spermatheca, the form of woman tail terminus, form, and duration of spicule and gubernaculum.
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A new organism, Organism E, has been discovered. How could scientists use its DNA to compare and classify this new organism?
Scientists can use DNA sequences to help determine if they have discovered a new species. They can also compare DNA sequences from different organisms and measure the number of changes (mutations) between them to infer if species are closely or distantly related.
What is Species?Species may be defined as the collection of organisms that can significantly reproduce with one another in nature in order to produce fertile offspring.
Scientists can also sequence huge chunks of genetic information among different organisms and then compare them to one another. When they do this, they look for strands of DNA -- or RNA or proteins -- that exhibit homologous sequences, or sequences with similar genes on them.
Therefore, scientists use the mechanism of DNA sequencing in order to compare and classify this new organism E.
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you can just put the answer thank you
1.
amount of carbon dioxide being used
amount of glucose being produced
2
amount of ATP used
amount of glucose used
What is photosynthesis?Photosynthesis is defined as a process in which solar energy is captured and organic molecules are produced. This process is fundamental for the survival of life on the planet and is the main way in which energy enters the biosphere.
Where does photosynthesis take place?Photosynthesis takes place in chloroplasts. Chlorophyll and carotenoids are arranged in the thylakoids of chloroplasts in units called photosystems. Two steps can be observed in photosynthesis: light reactions and carbon fixation reactions. At the end of photosynthesis, carbohydrates are produced.
How is ATP produced in the cell?The breakdown of glucose occurs to generate ATP. In organisms without mitochondria, such as bacteria, respiration takes place in a structure called a mesosome. This process uses glucose and oxygen and produces ATP, carbon dioxide and water.
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Wegener's theory of continental drift states that Earth's landmasses once were joined into a supercontinent called Pangaea. The landmasses then slowly drifted to their current positions. How does the evidence below support Wegener's theory?
1. The fit of the coastlines of Africa and South America:
2. Fossils of animals that are found on opposite sides of large oceans:
3. Evidence of north-moving glaciers in tropical southern India:
Answer: 1
Explanation:
in eukaryotic cells, the processes of protein synthesis occur in different cellular locations.
The method by which proteins are created is known as protein synthesis. DNA to RNA transcription takes place in the nucleus of eukaryotic cells.
In eukaryotic cells, what is protein synthesis?The method by which proteins are created is known as protein synthesis. DNA to RNA transcription takes place in the nucleus of eukaryotic cells. Following this, the mRNA strand leaves the nucleus and moves into the cytoplasm, where it is translated (from RNA to protein).
What is the method by which eukaryotes synthesize proteins?Protein synthesis takes place in all cells, including eukaryotes and prokaryotes. Transcription (turning DNA into RNA) and translation are the two steps involved in the generation of proteins (RNA to protein). Between prokaryotes and eukaryotes, there are differences in the place and method of protein synthesis.
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The picture shows a unicellular organism called a
paramecium.
Which structures in a paramecium work together to keep it alive?
A. Specialized cells
B. tissues.
C.organelles
D.organ systems
Answer:
Cilia
Explanation:
The paramecium has many different parts that help it survive, including cilia on the outside of its body. Cilia are tiny hair-like projections that can bend and straighten, propelling the paramecium through watery environments. Movement is important because the paramecium must find food to eat.
Answer:
Organelle
Explanation:
it was correct
which product of combustion acts as a chemical asphyxiant by excluding oxygen from the blood, leading to hypoxia of the brain and tissues?
A byproduct of combustion called carbon monoxide functions as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and the brain.
Uncompleted fuel combustion produces carbon monoxide (CO), an odourless, colourless gas. People exposed to CO gas will become ill because the CO molecules in their bodies will replace the oxygen.
Our senses cannot perceive CO because it lacks odour, colour, or taste. As a result, dangerous gas concentrations can accumulate indoors without people noticing until they become ill. Additionally, when someone is sick, they may mistake their symptoms for those of the flu, leading them to miss the early indications of CO poisoning.
As a result, carbon monoxide, a byproduct of combustion, can be said to serve as a chemical asphyxiant by keeping oxygen out of the blood, which causes hypoxia in the tissues and brain.
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epithelial cell abnormality atypical squamous cells of undetermined significance.T/F
epithelial cell abnormality atypical squamous cells of undetermined significance true
The most usual aberrant finding on a Pap test is atypical squamous cells with unknown significance. It might indicate an infection with specific strains of the human papillomavirus (HPV) or another infection, like a yeast infection.Can unclear significance atypical squamous cells be cancer?
Undetermined significance atypical squamous cells (ASC-US) — With ASC-US, the chance of cervical cancer is less than 1%, while the risk of a high-grade precancerous lesion (cells with a moderate to high risk of evolving into cervical cancer) is as high as 7%.
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The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to
The speaker compares the students waiting to take their drivers test to deer trapped in headlights in order to describe how nervous they look.
A drivers test is important for you to receive your permit within the country. Only with a legitimate permit are you able to ride or drive your two-wheeler and hackney coach in Republic of India. A drivers test contains of a theory half beside a sensible assessment likewise.
To not feel nervous while giving the drivers test, read through and con rules, road sign symbols, and different data which will be necessary to grasp throughout your take a test and this may take a bit of the nervousness away as a result of you’ll be mentally ready to pass the take a look at.
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What is Important about the soil pH?
Answer:
Soil pH affects the amount of nutrients and chemicals that are soluble in soil water, and therefore the amount of nutrients available to plants. Some nutrients are more available under acid conditions while others are more available under alkaline conditions.
In which organ does a fertilized egg change from an embryo to a fetus? A. Fallopian tubes B. Uterus C. Urethra D. Vagina
Answer:
B. uterus
Explanation:
Fertilization of an egg by sperm normally occurs in the fallopian tubes. The fertilized egg then moves to the uterus, where it implants into your uterine lining.
Answer:
B. uterusInside the uterus, the blastocyst implants in the wall of the uterus, where it develops into an embryo attached to a placenta and surrounded by fluid-filled membranes.ESPS are caued by the movement of what ion?
a. Na out of the cell
b. Na into the cell
c. K into the cell
d. Na , K into the cell
When sodium channels open in response to a stimulus, an excitatory postsynaptic potential (EPSP) takes place. As a result of the electrochemical gradient, sodium floods the cell.
Which ions result in an EPSP?Excitatory postsynaptic potentials (EPSPs) are connected to transmitter-induced increases in the synaptic membrane's Na+ and K+ conductance, which cause the membrane to depolarize and allow for the net entry of positive charge carried by Na+.
How do EPSP and IPSP ions work?EPSP: The passage of glutamate or aspartate ions causes EPSP to be produced. IPSP: Glycine or GABA flow causes IPSP to occur.
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essay about the cure for cancer
An essay in regards to the cure for cancer is given below
What is the cure cancer treatment?One of the most dreaded and feared diseases is probably cancer. Nearly 9.5 million individuals worldwide lost their lives to cancer in 2018. According to the World Health Organization, it ranks as the second most common cause of death.
Note Radiation, chemotherapy, and surgery are the most often used treatments. Other choices include hormone therapy, laser therapy, targeted therapy, immunotherapy, and others.
Therefore, The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
The type and stage of a person's cancer, the sort of treatment they can receive, and other factors all affect whether or not their cancer can be cured.
Therefore, Currently, there is no treatment for cancer. However, if treatment is effective, cancer may enter remission, which indicates that all outward indications of illness have disappeared. The likelihood of remission and a person's prognosis can both be considerably improved by early cancer detection and treatment.
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does caffeine work through a cns effect or a metabolic effect? what drawback is there for caffeine use?
Yes, It is true that caffeine work through CNS or a metabolic effect. Caffeine can have adverse effects such as restlessness, headaches, insomnia, nervous irritability and premature left-ventricular contractions.
What are some CNS effects of caffeine?Caffeine increases energy metabolism throughout the brain but decreases cerebral blood flow inducing relative brain hypoperfusion. Caffeine activates noradrenaline neurons that affects the local release of dopamine.
Caffeine/coffee stimulates the metabolic rate in control and obese individuals. Long-term effects of caffeine include chronic insomnia, constant anxiety, depression, and stomach problems and it can also cause high blood pressure. In high doses, caffeine can have severe effects on brain, heart and muscle function.
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what is the thin membrane that sticks to both shells and forms siphons that are used for drawing in and expelling water.membrane of bivalaves '
The mantle is the thin membrane that sticks to both shells and forms siphons that are used for drawing in and expelling water membrane of bivalaves
What is Mantle ?Numerous species have modified their muscular mantles to allow them to syphon water for propulsion and feeding. The mantle of mollusks with shells, like clams, mussels, and snails, secretes calcium carbonate and a matrix to create the mollusk's shell.
Between the shell and the body is a layer of tissue known as the mantle. To create the shell, it secretes calcium carbonate. It creates a space between the mantle and the body known as the mantle cavity. For filter feeding, the mantle cavity pumps water.
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Living organisms require energy for biological processes. Chemical energy in a plant cell is.
For biological functions, ATP is a crucial source of energy. ATP serves as an intermediary energy source, receiving energy from molecules like glucose. plays the role of a typical intermediate in metabolism
What are the three forms of metabolism?Ectomorph, mesomorph, the endomorph are the three basic metabolic types; these are words you generally won't hear in your typical, everyday talks. Long-term, nevertheless, your workout strategy will benefit from understanding the types of bodies you were born with.
Is a high metabolism beneficial?People with high metabolisms typically burn calories more quickly than those with low metabolisms, which is advantageous. But at the other hand, if your metabolism is quick, it could be hard to acquire weight or keep up a good diet.
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Organisms need energy for chemical reactions to build larger molecules. They also need energy to move and to stay __________.
All living things require energy to survive. In order to build complex carbohydrates, proteins, and lipids from the byproducts of photosynthesis in plants and digestion in animals, energy is needed.
In addition to using the energy in food to fuel life processes, organisms construct larger organic molecules, such as proteins, DNA, and fats (lipids), using the atoms found in food molecules. Cells release energy to create new compounds by dissolving the bonds in food molecules.
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Why are skeletal muscles striated?
Question options:
A) T-tubules cause the striations
B) Sarcoplasmic Reticulum causes the striations
C) The components of a sarcomere together cause the striations
D) Mitochondria cause the striations
The striations in skeletal muscles are caused by the components of a sarcomere working together.
What is skeletal muscle?Skeletal muscle is one of three major muscle tissues in the human body. Each skeletal muscle is composed of thousands of muscle fibers that are linked by connective tissue sheaths. Individual bundles of muscle fibers in skeletal muscle are known as fasciculi.Sarcomeres are the basic contractile units of muscle fibers made up of actin and myosin filaments. These filaments interact and slide past one another during muscle contraction and relaxation.Skeletal muscles can be found near some of your body's openings as well as between your bones. The muscle attaches to one end of the bone, then stretches across a joint and attaches to another. Tendons (fibrous connective tissues) help.To learn more about skeletal muscle refer to :
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Suppose a true-breeding orange flower is crossed with a true-breeding purple flower. In the next generation, all of the flowers are
purple.
What does this outcome tell you about the allele for orange flowers?
O The orange allele is dominant to the purple allele
O The orange allele shows incomplete dominance.
O The orange allele is recessive to the purple allele
O The orange allele is sex-linked
Answer: The orange allele is recessive to the purple allele.
Suppose human activities that influence the carbon cycle came to a complete stop. Use the information provided in the figure to predict the net effect on global carbon cycling.
a) Carbon cycling would be brought into balance so that it moves at equal rates through all compartments.
b) Carbon cycling would be shifted toward an increase in deposition in sediments and fossil fuels and a decrease in inorganic carbon dioxide levels.
c) Carbon cycling would be shifted toward an increase in outgassing of carbon dioxide from ocean waters and a decrease in carbon levels in living plant biomass.
d) Carbon cycling would be shifted toward an increase in dissolution of carbon dioxide into ocean waters and a decrease in carbon levels in living plant biomass.
In order for carbon cycling to occur evenly through all compartments, it must be balanced.
What does the word "human" mean?Due to the Middle French humain, which means "of or pertaining to man," the word "human" first appears in writing in the middle of the 13th century. In turn, that term is derived from the Latin humanus, which is regarded to be a hybrid relative of homo.
Just why did God create people?For the aim of sharing love, he made people. Love for God and neighbor is a natural human instinct. In addition, when God created humans, he gave them useful labor to perform so that they can experience God's kindness and reflect his likeness in the way they treat one another and the environment.
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which of the following statements about salmonellosis is false? group of answer choices it is a bacterial infection. a healthy carrier state exists. it is a self-limiting infection. the mortality rate is high. it is often associated with poultry products.
salmonellosis is a disease caused by salmonellosis bacteria and the mortality rate is high. it is often associated with poultry products.
What are antibiotics?
Antibiotics are medicine drugs specifically designed to treat bacterial infections that may cause harm to human health.
Moreover, septic shock is a phenomenon that occurs when blood pressure decreases to excessive values in the course of an disease/infection.
Bacteria can be classified into Gram-negative and Gram-positive, and Gram-negative bacteria may be negatively associated with septic shock because this type of treatment (antibiotics) can eventually trigger an increase in the amount of secreted endotoxins.
These toxins produced by Gram-negative bacteria (endotoxins) may produce serious harm to the health of the individual and thus antibiotics treatment may be deleterious.
In conclusion, antibiotics can lead to septic shock if used to treat gram-negative bacterial infections.
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when an hfr e. coli cell engages in conjugation with an f- cell, what will be transferred to the recipient cell if the conjugation bridge is broken after 20 minutes?
When an Hfr E. coli cell engages in conjugation with f- cell, then part of the F plasmid and portion of the bacterial chromosome is transferred to the recipient cell if the conjugation bridge is broken after 20 minutes.
What do you know about Hfr E.coli?High-frequency recombination(Hfr) cell is a bacterium with a conjugative plasmid integrated into its chromosomal DNA and the integration of plasmid in the cell's chromosome is through homologous recombination.
After the cross between Hfr cell and F- cell, recipient cell remains recipient and in this conjugation, chromosomal DNA is transferred from donor to recipient cell with the portion of F- factor. Therefore, the frequency of recombination is high.
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which stage of cellular respiration takes place in the cytosol? answer electron transport chain atp synthase glycolysis citric acid cycle
In contrast to the Krebs cycle and electron transport, which take place in the mitochondria and call for oxygen, glycolysis occurs in the cell’s cytosol and is oxygen-free.
Embden, Meyerhof, and Parnas provided the glycolysis diagram. Thus, it is often referred to as the EMP pathway. The cell's cytoplasm is where it takes place. The primary goal of glycolysis is to create the countless ATP molecules required for different types of cellular metabolism.
All cells' cytosols undergo glycolysis, which is the main pathway for the metabolism of glucose. Depending on whether oxygen is present, it can happen either aerobically or anaerobically. Due to the fact that aerobic glucose oxidation generates 32 mol of ATP for every mol of glucose, this has therapeutic significance.
While the Krebs cycle and electron transport take place in the mitochondria and require oxygen, glycolysis happens in the cell's cytoplasm without the need for it.
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which scenario will most likely result in a change to the nitrogen cycle that negatively affects plant growth?
Increased soil acidity may result in decreased crop and forest growth as well as the leaching of substances that harm water quality in nitrogen cycle such as heavy metals.
What could have a detrimental impact on the nitrogen cycle?By changing the quantity of nitrogen stored in the biosphere, researchers have found that people are interfering with the nitrogen cycle. Fossil fuel burning is the main offender because it produces nitric oxides into the atmosphere, which react with other substances to create smog and acid rain.
What are the two things that disturb the nitrogen cycle?The use of artificial nitrogen fertilizers, the burning of fossil fuels, and the discharge of nitrogen into wastewater are only a few human actions that have significantly changed the global nitrogen cycle. The natural environment system can suffer if the global nitrogen cycle is altered by humans.
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