Answer:
Explanation:
/
Which of these is a result of crossing over?
a.) Decrease in the number of chromosomes
b.) Exchange of proteins
c.) Exchange of genetic material
d.) Increase in the number of chromosomes
The result of crossing over is the exchange of genetic material that is present in Option C because this only happens in meiosis during the prophase and results in different gametes.
What is the importance of crossing over?"Crossing over" is a process that occurs during meiosis of cell division in sexually reproducing organisms that produces gametes such as sperm and eggs. During crossing over, the genetic material in the parent cells' chromosomes is exchanged, resulting in new combinations of genes in the gametes, and the importance of crossing over is that it creates genetic diversity within a population.
Hence, the result of crossing over is the exchange of genetic material that is present in Option C because this only happens in meiosis during the prophase and results in different gametes.
Learn more about the importance of crossing over here.
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What are the products in 6CO2 + 6H2O C6H12O6 + 6O2
Answer:
the product of photosynthesis is starch(sugar) and oxygen.
Desmosomes are made of the following cellular components
Answer:
jdhhdhdhhdhdhdbndbbdndb
1. Which of the following events is not a source of genetic variation in eukaryotic organisms?
J. Mutation
K. Independent assortment
L. Mitosis
M. Fertilisation
Answer:
Mitosis
Explanation:
Mitosis is not a source of genetic mutation because it take place mostly in the somatic cells. This is because it does not lead to the production of gametes . In mitosis, the parent cells divide into two daughter cells and each daughter cells are genetically identical to the parent cell because they carry the same number of chromosomes as the parent cell. There is no genetic variation in this.
As a genetic counselor, you advise couples about the possibility of genetic disease in their offspring. This morning you met with an engaged couple, both of whom are phenotypically normal. The man, however, has a brother who died of Duchenne-type muscular dystrophy, an X-linked condition that results in death before the age of 20. The allele responsible for this disease is recessive. His fiancee, whose family has no history of the disease, is worried that the couple's sons or daughters might be afflicted.
Requied:
a. How would you advise this couple?
b. The sister of this man is planning to marry his fiancée's brother. How would you advise this second couple?
Answer:
a. This couple should not worry.
b. This couple should worry.
Explanation:
a. The man should not be worried. This is because he is normal (phenotypically).
b. They should be worried because the sister of the man can be a carrier of the recessive allele. If she was a carrier, then half of their male children can be affected.
ANSWER PLSS GIVING BRAINLY
Answer: Primary succession: Glaciers, bare rock, lichen
Secondary succession: Wildfires, volcanoes, hurricanes, deforestation
Explanation:
Succession in ecology can be defined as gradual changes that occur in the biotic community in an ecosystem with respect to the changes that occur in the abiotic components of the environment. Primary succession initiate in an land which is not previously occupied by any living species. These includes the changes that occur at the primitive level on the land. That is the formation of glacier from the ice, bare rock will undergo withering and disintegration to form the soil, lichen are the biological composite organisms formed by the mutual association of algae and fungi. These lichens act upon the rocks to cause its withering by releasing the chemicals causing disintegration of the rocks.
Secondary succession occurs at those regions which have been colonized by the living species and get disturbed due to human oriented or natural disasters. Wildfires can be set up naturally, through volcanic eruption, or can be human induced can clear up the forests but some remains of seeds and deep rooted roots can help in growth of new plants which will again initiate the succession, again volcanoes, and hurricanes, are also natural hazards which can affect the population of species in an ecosystem. Deforestation is a human oriented practice in which vegetation cover or forests are clear cut. This will also cause loss of biodiversity.
1) Bacteria respond to changes in their environments, such as nutrient availability, by regulating their metabolic pathways. Describe two mechanisms that bacteria use in order to adapt to environmental changes. Include in your answer which mechanism is a short-term or long-term adaptation. (Pg. 364, paragraph 3, sentence 2; paragraph 4, sentence 1)
Answer:
Examples:
- Short-term adaptation: feedback inhibition
- Long-term adaptation: regulation of gene expression
Explanation:
Feedback inhibition is a mechanism where the product of a chemical reaction is utilized to modulate its own subsequent synthesis. In bacteria, feedback inhibition allows regulating different metabolic pathways in response to environmental conditions by modulating enzyme activity through enzyme reaction products. Moreover, bacteria may also respond to environmental inputs by long-term changes in gene expression. For example, bacteria contain transcription factors activated during stress, which are able to activate the transcription of particular genes into messenger RNAs (mRNAs) that would subsequently be used to generate particular enzymes by the process of translation. These transcription factors may bind to specific DNA motifs in order to promote transcriptional activity, thereby regulating the production of the corresponding enzyme.
NO LINKS AND I WILL GIVE BRAINLIEST!!
How was a round-the-world voyage useful to Darwin for developing his theory of evolution?
Answer: During the long voyage, Darwin made many observations that helped him form his theory of evolution. For example: He visited tropical rainforests and other new habitats where he saw many plants and animals he had never seen before (see Figure below). This impressed him with the great diversity of life.
Explanation:
Why is maintenance of a constant blood pH critical for body processes?
A. enzymes work best within a narrow pH range.
B. Some bacteria thrive in very acidic conditions.
C. Blood with a high pH helps prevent cancer.
D. The production of vitamin C by skin cells requires low pH values.
Answer:
enzymes work best within a narrow pH range.
Explanation:
Some bacteria thrive in very acidic conditions
GIVING BRAINLIEST!!
What were three different biomes that Darwin visited on his voyage.
Answer:
Tropical rain forest, temperate woodlands, temperate forest.
Explanation:
Charles Darwin collected plants and animal specimens for the study of their distinct pattern of biodiversity. Darwin visited three biomes namely temperate forest, tropical rainforest, and temperate grassland.
What are biomes?
A biome is a biogeographical unit which is consist of a biological community formed in response to a shared regional climate.
Biomes may be spread over more than one continent. Biome is a term for habitat which can be comprised of a variety of habitats.
During the voyage, Darwin visited three biomes namely temperate forest, tropical rainforest, and temperate grassland for the study of biodiversity of plants and animals.
Thus, it can be concluded that temperate forests, tropical rainforest, and temperate grassland are the three different biomes that Darwin visited on his voyage.
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How might a wildfire influence mass wasting? By drying out (removing the water) from the regolith on a slope, wildfires decrease the likelihood of a mass wasting event. A wildfire can dry out the regolith on a slope, making it less cohesive and more likely to travel downward. Wildfires burn only at the bottom of a slope, which oversteepens the slope and induces mass wasting. The ash from the wildfires lands on the slope, adding enough mass to instigate mass wasting. Because plants on a slope bind the regolith with their roots and shield the soil surface from raindrops, a wildfire that destroys these plants would render the soil looser and more susceptible to the erosional forces of rain.
Answer:
Because plants on a slope bind the regolith with their roots and shield the soil surface from raindrops, a wildfire that destroys these plants would render the soil looser and more susceptible to the erosional forces of rain.
Explanation:
The plants present in a region, protect the soil from being eroded by the impact of rain or wind. This is because the roots of the plants leave the soil more aggregated, block the impact of the wind and allow water to infiltrate. This protection is increased on slopes, where the chances of erosion are greater. However, when a fire occurs and these plants are killed, the roots no longer provide protection to the soil, leaving it drier and looser. This causes the wind to break this soil apart, facilitating erosion. In addition, rainwater has difficulties in infiltrating the soil and ends up draining, taking parts of the soil with it and causing erosion.
Oxygen and air are? Abiotic or biotic 
oxygen and air are abiotic
Answer:
Oxygen and air are both abiotic because they do not have carbon atoms, therefore they are non living substances.
If a wolf eats a herbivore, the energy is transferred ________.
Explanation:
enrgy used and it will help woth the enery that the herbivore ate
Answer:
from the herbivore to the wolf
What are there scientific name.
Please Answer
Answer:
manubruim = trapezoid
I hope it helps you
What geological feature is found along the sides of the grand canyon?
What does this feature turn into?
Answer:
The Colorado River has carved the Grand Canyon into four plateaus of the Colorado Plateau Province. The Province is a large area in the Southwest characterized by nearly-horizontal sedimentary rocks lifted 5,000 to 13,000 feet above sea level.
hope this answer helps you.....
Type the correct answer in the box.
The temperature equivalent to 77°F is
°C.
Use the formula to convert the temperature.
Answer:
25 degree celcius
Explanation:
formula
(given degree Fahrenheit - 32)×5÷9
(77 - 32)× 5÷9
= 25°C
Here I will show you how to convert 77 F to C so you know how hot or cold 77 degrees Fahrenheit is in Celsius. The F to C formula is (F − 32) × 5/9 = C. When we enter 77 for F in the formula, we get (77 − 32) × 5/9 = C.
so therefore the answer is 25 degrees celsius
What caused scientists to believe the continents used to be
Matching (1pt each) Match the structures/organisms on the right to the appropriate statement below. Use each letter once.
i. A body cavity surrounded on only one side by mesoderm:
ii. Fungal hyphae without septa
iii. Structure made entirely of endoderm tissue in bilateral animals:
iv. Structural compound that provides strength to xylem & phloem:
v. Structure where microspores are created in Angiosperms:
vi. This process happens just prior to meiosis in ‘club’ and ‘sac’ fungus:
vii. A structure used by fungus to penetrate a plant’s cell wall:
viii. Something that will sting you if touched while you swim in the ocean:
ix. A structure used by Ectoprocts during suspension feeding:
x. A lifeform that results from a mutualism between a fungus and algae:
xi. A plant that relies on flagellated sperm for reproduction:
xii. Structure containing pollen in Conifers:
A. Alimentary canal
B. Pseudocoelom
C. Coenocytic
D. Lignin
E. Appressorium
F. Karyogamy
G. Anther
H. Lichen
I. Anthozoan
J. Lophophore
K. Monilophyte
L. Male cone
Answer:
i
Explanation:
Explain how gene therapy is able to solve genetic diseases. Please take
your time explaining in detail a few of the the tools that are currently used
for this treatment. (5 marks)
Answer:
Gene therapy is used to correct defective genes in order to cure a disease or help your body better fight disease. Researchers are investigating several ways to do this, including: Replacing mutated genes. Some cells become diseased because certain genes work incorrectly or no longer work at all
Match each explanation to the correct step of the Scientific
Method.
Explanation:
Hi!! sorry to take up this space and probably waste your time but you didn't insert a picture or equation!! I'm so sorry, I'd help you otherwise!
Match the elements to their periodic table groups based on their uses or properties
Mitosis is the division of the _____ and begins with a stage called ____ . As the nuclear envelope finishes dissolving, the cells enter ____, where microtubules from the spindle attach to the duplicated X-shaped chromosomes.
When all chromosomes are fully attached to the spindle, they align at the midplate between poles. This marks the middle of mitosis, which is ____ . As sister chromatids separate, cells enter ____ and they finish separating and a nucleus reforms around each set of new chromosomes in ____ . During this phase, cytokinesis also becomes visible as the cells themselves begin to divide.
Answer:
cell; prophase. prometaphasemetaphase. anaphase, telophase.Explanation:
Mitosis is the division of the cell and begins with a stage called prophase. As the nuclear envelope finishes dissolving, the cells enter prometaphase, where microtubules from the spindle attach to the duplicated X-shaped chromosomes.
When all chromosomes are fully attached to the spindle, they align at the midplate between poles. This marks the middle of mitosis, which is metaphase. As sister chromatids separate, cells enter anaphase and they finish separating, and a nucleus reforms around each set of new chromosomes in telophase. During this phase, cytokinesis also becomes visible as the cells themselves begin to divide.
how many milliliters of acetic acid solution (contents of weigh boat C) did you have to add to neutralize the contents of Beaker B, the sodium bicarbonate?
Answer: SDFGHNJMNJHIBUGVFCVGBJHNK
Explanation:DXGNK MBFCHBJKN
Which of the following scientists are accredited with discovering DNA?
Group of answer choices
Einstein
Watson and Crick
Gregor Mendel
all of these
Answer:
Watson and Crick
Explanation:
Which process of respiration does fermentation utilize?
Answer:
anaerobic respiration: A form of respiration using electron acceptors other than oxygen. fermentation: An anaerobic biochemical reaction. When this reaction occurs in yeast, enzymes catalyze the conversion of sugars to alcohol or acetic acid with the evolution of carbon dioxide
Explanation:
Helpp me plz is it A,b,c ,d make sure you pick the rite one
Answer:
C. a System
Explanation:
for anyone out there
In the human body, organ-systems interact with each other to maintain homeostasis.
Using the diagram above, explain how this system interacts with another in the body to maintain homeostasis?
O The circulatory and digestive systems interact to produce and deliver oxygen to the body.
The respiratory and digestive systems work together to produce and transport nutrients to all cells in the body.
The digestive and excretory systems interact to produce and remove waste from the body.
The immune and digestive systems work together to provide protection against infectious organisms in the body.
Answer:
i believe its d
Explanation:
What is gene therapy in a short answer?
Answer:
Gene therapy is designed to introduce genetic material into cells to compensate for abnormal genes or to make a beneficial protein. If a mutated gene causes a necessary protein to be faulty or missing, gene therapy may be able to introduce a normal copy of the gene to restore the function of the protein.
Answer:
Gene therapy is a medical field that focuses on the genetic modification of cells to produce a therapeutic effect or the treatment of disease by repairing or reconstructing defective genetic material.
Explanation:
The reduction of a molecule is classified as what type of reaction?
explosion.......................... >:(
One of the purposes of transcription is to produce a sequence of bases that
А. transforms into carbohydrate molecules.
B. replicates molecules of DNA without using sugars.
C. codes for the manufacture of a specific protein.
D. substitutes for essential amino acids.
Answer:А. transforms into carbohydrate molecules.
Explanation: