Answer:
receptors are chemical structures, composed of protein, that receive and transduce signals that may be integrated into biological systems
Explanation:
Answer:
a protein which binds to a specific molecule. The molecule it binds is known as the ligand. A ligand may be any molecule, from inorganic minerals to organism-created proteins, hormones, and neurotransmitters.
1.What is the most variable class of RNA?
2.What is the main function of mRNA?
Answer:
1. mRNA
Explanation:
2. messenger RNA (mRNA) carries the protein blueprint from a cell's DNA to its ribosomes, which are the "machines" that drive protein synthesis.
After a volcano erupts and destroys an ecosystem, a few organisms are able to begin growing from the decaying organic matter left behind. What do we call those organisms that are able to grow in little or no soil that first appear?
Answer:Pioneer species
Explanation: Pioneer species are the first species to live in an area after it has been destroyed as mentioned.
___ It’s a nice sunny day with no clouds but it is very cold outside
A. High air pressure
B. Low air pressure
Answer:
..mmm.... high pressure I guess.....
...
and are you sure that the outside will be freaking cold with a freaking sun above ..??..
How do the genes for a defective enzyme that results in albinism compare to the normal enzyme for synthesizing melanin?
Answer:
Albinism is a genetic condition where people don't have the usual pigment (color) in their bodies.
Explanation:
The genes for a defective enzyme results in albinism in the individual as compared to the normal enzyme for synthesizing melanin because albinism occur due to defective enzyme that is responsible for the coloration of the skin while on the other hand, melanin is produced normally in the body if the enzyme is not defective and the skin has normal pigment. Albinism is a genetic condition where people don't have the usual pigment (color) in their bodies. Albinism occurs in individuals due to absence of normal amount of melanin in the body which is a natural skin pigment.
Helpppppp! ASAP
What is occurring in the diagram below?
A. Sister chromatids are separating.
B. Alleles are independently assorting.
C. Genes are replicating.
D. Segments of DNA are crossing over.
Answer:
D
Explanation:
The diagram below shows a portion of a chromosome during meiosis. Meiosis is a process of cellular division that produces haploid gametes from diploid cells. The process of meiosis involves two rounds of nuclear division.
What happens in the process of meiosis ?During the first round, homologous chromosomes pair up and exchange genetic material. This process is known as crossing over.
The diagram below shows a section of the chromosome during the first meiotic division. The chromosome is composed of two sister chromatids, which are identical copies of each other.
These sister chromatids are held together by a centromere. At this stage, the sister chromatids are in the process of separating from each other. The arrows indicate the direction of movement of the chromatids as they separate. The diagram also shows a section of the chromosome where the two sister chromatids have already separated.
This section is known as a chiasma, and it is the result of crossing over. During crossing over, segments of DNA from the two homologous chromosomes exchange places. This process creates genetic variation in the gametes, which is important for evolution.
In conclusion, the diagram shows sister chromatids separating, alleles independently assorting, segments of DNA crossing over, but not genes replicating. The correct answer is A. Sister chromatids are separating.
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Describe the action of CILIA in the movement of mucus. ANSWER ASAP PLS!!!
Answer:
Motile' (or moving) cilia are found in the lungs, respiratory tract and middle ear. These cilia have a rhythmic waving or beating motion. They work, for instance, to keep the airways clear of mucus and dirt, allowing us to breathe easily and without irritation. They also help propel sperm.
.
Please give me a brainliest
A scientist has found fossils of an organism that she suspects is related to a living
vertebrate species, but it has different physical characteristics. The fossil is dated
at 10 million years old. The scientist wishes to look for a transitional species
between the fossil organism and the living vertebrate species. Which location
would be the best to find fossils of a transitional species?
in volcanic rock that is dated at 10 million years old
in volcanic rock that is dated at 20 million years old
in sedimentary rock that is dated at 5 million years old
in sedimentary rock that is dated at 20 million years old
Answer:
the 3rd one
Explanation:
Does grain size determine the porosity of a sediment type?
Answer:
Yes
Explanation:
In sediments or sedimentary rocks the porosity depends on grain size, the shapes of the grains, and the degree of sorting, and the degree of cementation. Well-rounded coarse-grained sediments usually have higher porosity than fine-grained sediments, because the grains do not fit together well
Measurement needed in children's wear?
need kopo ng answer agad:)
Answer:
Height
Chest/Bust
Waist
Hips
Inside Leg
What is nuclear energy?
A. the energy released in nuclear reactions
B. the energy it takes to bond elements to form compounds
C. the energy holding the particles in a nucleus together
D. the energy that causes the water in a pot on the stove to boil and form steam
Answer:
C
Explanation:
Nuclear energy is the energy in the nucleus, or core, of an atom. Atoms are tiny units that make up all matter in the universe, and energy is what holds the nucleus together. There is a huge amount of energy in an atom's dense nucleus.
8. In the food web below, which organism is NOT considered a consumer?
F. Kingfisher
G.Tadpole
H.Algae
J.Snail
cell is discovered by whom
Answer:
Explanation:
Cell is discovered by Robert Hooke.
Answer:
The cell is initially discovered by Robert Hooked in 1665
thanks fpr the help man! i appreciate it!
Which is a false statement concerning photosynthesis and aerobic respiration?
A. Both occur in specific organelles
B. Both release oxygen as an end product
C. Both require ATP
D. Both involve the movement of electrons in transport chains
E. Both occur inside the cell
Answer: B is wrong
Explanation: Aerobic respiration needs oxygen
2) Which of these would best explain why the microbial population
begins to decrease after a period of time?
A) organisms moved away to find new mates
B)
extra food was introduced into the area
the graph actually never shows the population
decreasing
D)
organisms began to die as the population was larger
than could be supported by the limiting factors
Answer: D.) organisms began to die as the population was larger than could be supported by the limiting factors
Explanation: i just took this assessment :)
The best explanation for the microbial population beginning to decrease after a period of time is that organisms began to die as the population was larger than could be supported by limiting factors. The correct option is D).
What is the population?Applying population ecology and population genetics to study the ecology and evolution of bacteria, archaebacteria, microscopic fungi (like yeasts), and other microscopic eukaryotes is known as microbial population biology.
The evolution of the bacterial population. Growth starts out exponential. After that, the population curve levels off, which most likely denotes the population's carrying capacity. A drop in the microbial population is then shown by the curve's downward bend. Numerous causes, both density-dependent and density-independent, can be blamed for the drop.
Therefore, the correct option is D) organisms began to die as the population was larger than could be supported by the limiting factors.
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The population of Dubai at the end of 2012 was 2.1 million. This was predicted to increase at a rate of 6% each year. Calculate the predicted population of Dubai at the end of 2015?
Mathematics
Answer:
2.1×0.06^3= the correct answer
Explanation:
using a compound formula used for interest u can use this to see how the population is increasing by multiplying the principal×rate^time
Answer:
Population at the end of 2015 is 2.5 million.
Explanation:
Population of Dubai at the end of 2012 is 2.1 million.
Rate of increase of population is 6%
Population at the end of 2013 is 2.1 million +(6% of 2.1 million) =2.226 million.
Population at the end of 2014= 2.226 million + 6% of 2.226 million = 2.35956 million.
Population at the end of 2015 is = 2.35956 million + 6% of 2.35956 million = 2.5 million.
Hope this answer helps you :)
Have a great day
Mark brainliest
7. Which type of mass movement occurs rapidly
when a single mass of soil and rock suddenly
slips downhill?
A. creep
B. landslide
C.mudslide
D. slump
Answer:
The most destructive type of mass movement is a landslide, which occurs when rock and soil slide quickly down a steep slope. Some landslides may contain huge masses of rock, while others may contain only a small amount of rock and soil. A mudflow is the rapid movement of a mixture of water, rock, and soil.
Elephants are not the most common species in African grasslands. And although they are large, their combine biomass is really not that big compared to some of the combined biomass of plants in those habitats. The grasslands contain scattered woody plants, but they are kept in check by the uprooting activities of the elephants. Take away the elephants, and the grasslands convert to forests or to shrublands. The newly growing forests support fewer species than the previous grasslands. What term best describes the role played by elephants in these communities
Answer:
This question lacks options, options are: a. Keystone species b. Dominant species c. Competitor species d. Omnivore species e. Mutualistic species. The correct answer is a.
Explanation:
The most connected species from a trophic point of view in an ecosystem are keystone species, since their elimination has great effects on the stability and persistence of the network. The Keystone species are those species that play a crucial role in the structure and dynamics of a certain ecosystem and that, in the event of their disappearance, would be seriously unbalanced. These species are responsible for the physical structure of the habitats of many other species, and they play an important role in the succession processes of ecosystems. Elephants play an important role in maintaining the structure and balance of ecosystems in these communities, therefore they are keystone species.
Answer:
A. Keystone species.
Explanation:
A species that has huge impact on the other in the case when there is not much abundant species. In addition to this, it would keep the other populations in the ecosystem. Moreover, if the species would be removed so this would lead in diversity loss
So according to the given situation, the role that played by elephants in these communities is keystone species
Name and explain each lymph organ.
Explanation:
What are the organs of the immune system?
Publication Details
Our immune system is made up of both individual cells and proteins as well as entire organs and organ systems. The organs of the immune system include skin and mucous membranes, and the organs of the lymphatic system too.
Organs that function as barriers
Your skin and mucous membranes are the first line of defense against germs entering from outside the body. They act as a physical barrier with support from the following:
Antibacterial substances can kill germs right from the start. A certain enzyme found in saliva, the airways and tear fluid destroys the cell walls of bacteria.
Mucus in the bronchi helps trap many of the germs we breathe in so they can be moved out of the airways by hair-like structures called cilia.
Stomach acid stops most of the germs that enter the body in the food we eat.
Harmless bacteria on our skin and many of the mucous membranes in our body also act as part of the immune system.
In addition, the reflexes that cause us to cough and sneeze help to free our airways of germs.
Illustration: The parts of the immune system
The parts of the immune system
Lymphoid organs
The lymphatic system is composed of:
Primary lymphoid organs: These organs include the bone marrow and the thymus. They create special immune system cells called lymphocytes.
Secondary lymphoid organs: These organs include the lymph nodes, the spleen, the tonsils and certain tissue in various mucous membrane layers in the body (for instance in the bowel). It is in these organs where the cells of the immune system do their actual job of fighting off germs and foreign substances.
Bone marrow
Bone marrow is a sponge-like tissue found inside the bones. That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells. Over the course of our life, more and more red bone marrow turns into fatty tissue. In adulthood, only a few of our bones still contain red bone marrow, including the ribs, breastbone and the pelvis.
Thymus
The thymus is located behind the breastbone above the heart. This gland-like organ reaches full maturity only in children, and is then slowly transformed to fatty tissue. Special types of immune system cells called thymus cell lymphocytes (T cells) mature in the thymus. Among other tasks, these cells coordinate the processes of the innate and adaptive immune systems. T cells move through the body and constantly monitor the surfaces of all cells for changes.
Lymph nodes
Lymph nodes are small bean-shaped tissues found along the lymphatic vessels. The lymph nodes act as filters. Various immune system cells trap germs in the lymph nodes and activate the creation of special antibodies in the blood. Swollen or painful lymph nodes are a sign that the immune system is active, for example to fight an infection.
Spleen
The spleen is located in the left upper abdomen, beneath the diaphragm, and is responsible for different kinds of jobs:
It stores various immune system cells. When needed, they move through the blood to other organs. Scavenger cells (phagocytes) in the spleen act as a filter for germs that get into the bloodstream.
It breaks down red blood cells (erythrocytes).
It stores and breaks down platelets (thrombocytes), which are responsible for the clotting of blood, among other things.
There is always a lot of blood flowing through the spleen tissue. At the same time this tissue is very soft. In the event of severe injury, for example in an accident, the spleen may rupture easily. Surgery is then usually necessary because otherwise there is a danger of bleeding to death. If the spleen needs to be removed completely, other immune system organs can carry out its roles.
I A segment of a DNA molecule unzips, revealing a instructions in a for that protein. with the
please help me will give branlist
Answer:
An outline, and a goal, list of materials, and a set of steps to follow.
Hope that this helps!
Answer:a
Explanation:
Define The process of respiration.
Answer:
It is the oxidation of food substances to release energy for metabolic activities
Explanation:
it is a biochemical process which involves the breaking down of food substances by the cell with or without oxygen for metabolic activities
Explanation:
Respiration is defined as a metabolic process wherein, the living cells of an organism obtains energy (in the form of ATP) by taking in oxygen and liberating carbon dioxide from the oxidation of complex organic substances.”
Plants make food through photosynthesis, and photosynthesis takes place mostly in plant leaves, but when plants lose their leaves in the winter, they do not die.
This is evidence that
A.
plants can use heat in the ground to make food.
B.
someone gives the plants food every day.
C.
plants store food for later use.
D.
photosynthesis also takes place in plant roots.
NO LINKS PLEASE
Answer:
Plants, like cacti, don't have leaves in the traditional sense. (Their spines are actually modified leaves.) But the cells in the body or “stem” of the cactus plant still contain chlorophyll. Thus, plants like cacti can absorb and convert energy from the sun through the process of photosynthesis
Explanation:
photosynthesis also takes place in plant roots
You are replicating Gregor Mendel’s famous experiment with sweet peas.
The genotype for dominant smooth-seeded parent is designated AA, while
the genotype for the wrinkled-seeded parent is aa. Using a punnet square
predict the first generation for this cross. What are the genotypic and
phenotypic ratios? SHOW ALL WORK.
I WILL GIVE BRAINLEST ANSWER IF SOMEONE COULD SOLVE THIS OUT FOR ME PLEASE I NEED IT ASAP!!!! DUE IN 30 MINS!!!!!!!!
Answer:
answer is in the picture above
Jena is using a drawing to show how the greenhouse effect works. She uses arrows to depict the movement of
radiation from the sun, through space, and through the Earth system.
Which arrows show how radiation interacts with the greenhouse gases?
A) the arrows from the sun to the Earth's surface and from the Earth's surface to space
B) the arrows from the sun to the atmosphere and from the atmosphere to space
C)the arrows from the Earth's surface to the atmosphere and from the atmosphere to the Earth's
surface
D)the arrows from the sun to the Earth's surface and from the Earth's surface to the underlying
rocks and soil
Answer:
The correct answer is - C. the arrows from the Earth's surface to the atmosphere and from the atmosphere to the Earth's surface.
Explanation:
Interaction between radiation and greenhouse gases can be demonstrated or represented by a model which shows how the radiation from different sources of the earth's surface is released in the atmosphere and how the radiation comes to the earth's surface from the atmosphere of the earth.
The radiation trapped by the greenhouse gases and more infrared radiation will be absorbed and emitted back toward Earth's surface, which affects and show more greenhouse effect.
which one is a lie? someone pls answer I need help
Answer:
I'm pretty sure number two is the lie. I'm not 100% sure tho
1. What are two ways living things (organisms)
affect the soil?
is
Answer: Humans and other organisms use the soil to decompose these waste materials into new materials.
Explanation:
what is myogenic heart? give one example
Answer:
The myogenic heart is the characteristics of vertebrates where continuous rhythmic contraction occurs. The myogenic heart is the intrinsic property of the cardiac muscles. Each contraction of the heart muscle regulates the flow of blood in the form of a pulse or heart rate.
Explanation:
i hope its helps
Which of the following is an example of current electricity?
A.
hair standing on end on a dry day
B.
a balloon sticking to a wall
C.
a charged cloud
D.
a lit flashlight
PLEASE DO NOT ANSWER IF YOU DO NOT KNOW
Which two inferences about the chipmunk population can be supported with the data gathered by the biologist?
Answer:
The amount of food in the area decreased, causing more chipmunks to
survive to reproductive age.
Explanation:
Hope this helps :)
Chipmunks in later generations showed greater genetic diversity than previous generations, allowing for a greater survival rate in later generations. Individual chipmunks changed their genetic makeup and became more successful in the environment. The correct options are R and S.
What is genetic diversity?Genetic diversity refers to the total number of genetic traits that make up a species' genetic composition.
It varies greatly depending on the number of species present as well as across species, and it can be linked to a species' longevity.
DNA contains all the biological information and variety required to sustain life on our planet.
Genetic variety is referred to as this. It improves a species' and population's resistance to maladies, pests, climatic changes, and other pressures.
According to the findings, Chipmunks had a higher genetic variety in later generations than in earlier generations, which allowed for a higher survival rate in later generations. Individual chipmunks altered their genetic make-up and improved their chances of survival.
Thus, the correct options are R and S.
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Your question seems incomplete, the probable complete question is:
A biologist studies a population of chipmunks. Some of the biologist’s
findings are shown.
Years 1 – 20:
• The population remains below
125.
• Less than half of newborn
chipmunks survive to adulthood.
• Competition for food and
resources limits population
growth.
Year 21 and beyond:
• Ninety percent of newborn
chipmunks survive to adulthood.
• The population increases to over
200 chipmunks.
M. The amount of food in the area decreased, causing more chipmunks to
survive to reproductive age.
P. Chipmunks in later generations showed greater genetic diversity than
previous generations, allowing for a greater survival rate in later generations.
R. Chipmunks migrated from one country to another country to increase the
number of chipmunks in the studied area.
S. Individual chipmunks changed their genetic makeup and became more
successful in the environment.
T. The number of predators in the area decreased, so more chipmunks were
able to survive.