Answers
Answer:
Bone marrow is the spongy tissue inside some of your bones, such as your hip and thigh bones. It contains stem cells. The stem cells can develop into the red blood cells that carry oxygen through your body, the white blood cells that fight infections, and the platelets that help with blood clotting.
Answer:
Bone marrow is a spongy tissue found inside bones.
Red bone marrow involves the production of blood cells. Yellow bone marrow produces cartilage and is important for fat storage.
Related Questions
You are studying three populations of an endangered species of toad that used to be common in the California central valley. Global warming has caused this species to retreat to higher elevations in recent decades where it stays cooler; the toad used to be found throughout the valley, but is now restricted to the tops of three mountains. Historical records indicate that there used to be hundreds of thousands of toads in the central valley, but sampling the mountaintops reveals that the toad population on each is now limited to a few hundred individuals. You survey allozyme diversity at one locus on each of the three mountaintops and find that each population is fixed for a different allele of the ribbit gene: mountain #1 is fixed for the A1 allele, mountain #2 for the A2 allele, and mountain #3 for the A3 allele. The average number of baby toads born in each population is the same, and the environment on each mountaintop is very similar, as far as your data show.
Explain why each population is fixed for a different allele.
Sentence 1: Describe the variability that was initially present in each of the populations.Sentence 2: State which individuals had the highest fitness in a given population, or why fitness is not an issue if that is your conclusion.Sentence 3: Explain what evolutionary force acted on the population(s), and why and how it acted.Sentence 4: Describe how the populations evolved in response to their changing environment. Be as specific as you can (e.g., say "increased" or "decreased", rather than just "changed".)
Answers
Answer:
Explanation:
The allele are fixed because there is no variation that exist in the population and the allele are almost completely the same hence no new combination of gene the same Allele will continue to reoccur
Variability exist because of random mating that occurs in the population initially when the toad filled up the entire central valley
Random mating ensures fitness in the initial population
Genetic drift acted upon the population drifting away allele that are very few in population or that occur less in the population and perpetuating alleles that frequently occur leading to a fixed allele.
There was a decrease in the population as a result of the change in the environment.
Why have plants in the alpine biome adapted to survive on limited nutrients?
Answers
Answer:
The soil in the alpine biome is rocky and nutrient poor. Plants that live in the alpine biome must be suited to the nutrient poor soil.
Explanation:
The plants living in the alpine biome are adapted to survive on limited nutrients as the conditions in the alpine biome is harsh and not favorable. Hence, the plants have to adapt the mountain climate.
What are adaptations?An adaptation is any physical or behavioral feature of an organism that helps them to survive better in their environment. In other words, an adaptation is something that helps them in finding food, water, mates, and shelter.
The alpine climate is the typical climate for elevations above the tree line, where the trees fail to grow due to cold conditions. The climate of alpine biomes is also referred to as the mountain climate or highland climate.
Plants which are living in alpine biomes are typically low growing due to the extreme environmental conditions. There are only about 200 species of alpine biome plants which have adapted to life in cold temperatures and sparse rainfall.
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Which of the following substances is NOT able to simply diffuse across the 1 point
plasma membrane?*
Water
Oxygen
Carbon Dioxide
Sodium
Answers
Answer:
Sodium
Explanation:
because ions have a charge which prevents them from moving across the cell membrane through simple diffusion
Explain the steps (5) that would need to take place for primary succession to occur.
Answers
Answer:
The labels I-VII represent the different stages of primary succession. I-bare rocks, II-pioneers (mosses, lichen, algae, fungi), III-annual herbaceous plants, IV-perennial herbaceous plants and grasses, V-shrubs, VI-shade intolerant trees, VII-shade tolerant trees.
Explanation:
What is the function of the eukaryotic cell?
Answers
Answer: Eukaryotic cells have a true nucleus, which means the cell's DNA is surrounded by a membrane. Therefore, the nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes, the cellular organelles responsible for protein synthesis.
Explanation: Mark as brainllest
Answer:
their functions are different depending upon their location and organism in which they are. for example the cells of stomach wall release mucous, similarly the cell of pancreas release pancreatic juice. and the sieve tube cells help in water transfer from source to sink.
So, all this just depends upon their location and area of labor you can say. Ig i took this last year so i don't remember much
Which of the following is NOT a part of Cell Theory
All cells come from pre-existing cells
Cells are the basic units of structure and function in living things
All living things are composed of one or more cells
Cells can't be created or destroyed
Answers
Answer:
from my point of view the answer should be self can't be created or destroyed
When someone tosses an object towards your face, you blink. This response is controlled
by
O A. amino acids
B. the immune system
C. hormones
a
O D. the nervous system
Answers
Answer:
D. the nervous system
Explanation:
This system of your body controls your reflexes! :D
Answer:
Nervous system
Explanation:
The nerve receptors responsible for transmission of impulses to the brain are a part of nervous system.
5. What happens to the force between the two spheres of the same
mass when the distance the mass Spheres is halved?
Answers
Answer:
The force of gravity on each object increases with the square of the inverse distance as they fall together, and hence so does the acceleration. For example, if the distance is halved, the force and acceleration are quadrupled.
Explanation:
Our solar system is in the _______ arm of the Milky Way galaxy, 28,000 light years from its center.
Answers
Answer:
Orion arm
Explanation:
please answer quick! may give brainliest
What compound makes up carbohydrates?
a.
glucose
c.
amino acids
b.
nucleic acids
d.
phosphates
Answers
Lemme know if you get it right :D
Answer:
a .glucose...
Explanation:
please mark as brainiliest
3'AGGTCAGGT 5
Which of these is the correct complementary DNA strand for the segment shown?
Answer
A S'AGGTCAGGT 3
B
S'ACCUGAGGU 3
C 5'TGGACTGGA 3
D 5' TCCAGTCCA 3
Answers
The correct complementary DNA sequence of 3'AGGTCAGGT 5 is - D. 5' TCCAGTCCA 3'
DNA is made of two strands of DNA strands coiled together and form a ladder-like shape. DNA molecules have four nucleotide bases that joined both strands together that are Adenine (A), Guanine (G), Thymine (T), and Cytosine(C).
Each nitrogenous base has its own complementary base in a double-helical structure.The A is complimentary T and G will have CThe complementary strand is always present in an antiparallel directionIf one strand is 3' to 5' then the complementary strand would be 5' to 3'So, in the given sequence: 3'AGGTCAGGT 5
Complementary sequence: 5' TCCAGTCCA 3
Thus, the correct option is: option D. 5' TCCAGTCCA 3
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Answer:D 5' TCCAGTCCA 3
Explanation:because A turns to T and G turns to C for DNA but for RNA A turns to U and vise versa
What kind of protist causes dysentery?
A euglena
B amoeba
C algae
D slime mold
Answers
Answer:
D
Explanation:
Think about death rates and birth rates in a population. How will
the two compare in a shrinking population?
SELECT AN ANSWER
The birth rate will be larger.
Both will be equal to one another.
Neither has an affect on the population.
The death rate will be larger.
Answers
Answer:
it will compare that neither has an affect on the population and it will also compare that both will be equal to one another.Hope this helps let me know if its wrong or not have a good day.
Explanation:
It will compare that neither has an affect on the population and it will also compare that both will be equal to one another.
What is population?The term "population" refers to all citizens who are either permanently residing in a country or who are just passing through. This indicator reveals how many people typically reside in a certain area.
Growth rates are the population changes that occur each year as a result of births, deaths, and net migration.
The total population also includes national military forces deployed overseas, merchant mariners at sea, diplomatic staff based abroad, civilian foreign nationals residing in the nation, and internally displaced people residing in the nation. Demographic tools like population predictions are frequently used.
Therefore, It will compare that neither has an affect on the population and it will also compare that both will be equal to one another.
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I need help doing this
Answers
Answer:
By releasing CO2 it would warm the planet and help plants grow. But realising too much would be one cause of global warming. Also, more CO2 in the atmosphere would cause the ocean water to become more acidic, putting marine life in danger.
Explanation:
1.Which of the following is an example of nature's leftovers? Oa snake eating an entire mouse carrots left underground after the leaves have been eaten aboveground O a bird eating an entire earthworm a plant growing in a garden
Answers
Answer:
i choose O2
Explanation:
a bird eating an entire earthworm a plant growing in a garden (confused)
an earthworm and a plant are both products of nature and that is normal between nature's survival for the fittest so a plant eating an earth worm is way of showing nature's leftovers of the earth worm and plant
02.01 properties of water
Answers
Answer:
i know only 3 properties
Explanation:
colourless
odourless
tasteless
Which of the following units are repeatedly joined together to form a strand of DNA?
Answers
Answer:
Nucleotides
Explanation:
The nucleotides forming each DNA strand are connected by noncovalent bonds called hydrogen bonds.
Nucleotide is the unit that repeatedly joined together to form a strand of DNA.
What is DNA?Deoxyribose + phosphate group + thymine could be a nucleotide of DNA and defined as deoxyribonuclic acid and it is a polymer made up of two polynucleotide chains that arranged in foiled structure to form a double helix carrying genetic information for the various processes such as growth development functioning and reproduction.
There are four nitrogen bases of DNA nucleotides are such as adinine, thymine, guanine and cytosine.
Friedrich miescher discovered DNA in the year of 1860.The shape of DNA is double helical structure
The main function of DNA is to carry information from one generation to another generation this is the reason due to which DNA is also known information molecule.
In our body DNA is found in the nucleus of the cell and it is known as nuclear DNA. The shape of DNA is double helical structure.
Siblings share only about 50% of same DNA due to the reason of recombination. The life span of DNA is 521 years.
Therefore, Nucleotide is the unit that repeatedly joined together to form a strand of DNA.
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What provides the energy to add the phosphate group back to ADP to form
ATP?
O oxygen we breathe
O excercise
O ATP in food we eat
O the food we eat
Answers
Answer:
D
Explanation:
I think that's the answer :)
what is ecosystem
please say
Answers
Answer:
[tex] \boxed{ \text{below \: in \: bold}}[/tex]
Explanation:
[tex] \huge{ \underline{{ \text{Ecosystem}}}}[/tex]
No living beings can survive alone. There always exists a close relationship between living and non - living things. The environment of the earth consists of physical and biological factors. The physical and biological factors together constitute an ecosystem. The ecosystem may be natural or artificial , temporary or permanent. Thus, an ecosystem is an ecological unit which consists of both biotic ( living ) and abiotic ( non - living ) factors of the environment. The organisms and the environment are inseparably interrelated and interactive in their nature. A.G. Tansley ( 1935 ) , a British ecologist used the term ecosystem first.
Hope I helped!
Best regards! :D
~[tex] \text{TheAnimeGirl}[/tex]
_________
#LetsStudy
If a section of DNA experiences base mutation at a predictable rate, then ________________.
Answers
Answer:
your answer would be These external agents of genetic change are called mutagens. Exposure to mutagens often causes alterations in the molecular structure of nucleotides, ultimately causing substitutions, insertions, and deletions in the DNA sequence.
i don't know if this is correct or not let me know please.
Explanation:
Which letter indicates a cell structure that directly controls the movement of molecules into and out of the cell?
Answers
Answer:
Cell membrane controls the movement of molecules into and out of the cell
Explanation:
Answer:
cell membrane
Explanation:
it controls what goes in and out of the cell
is protein a living cell or a virus
Answers
Answer:
Neither.
Explanation:
Proteins are molecules composed of carbon, hydrogen, oxygen, and most importantly one or more chains of amino acids. They are vital to living cells and are required in the process of making, repairing, and composing functioning tissues as well as helping them function.
I hope this helps! :)
Which of the following statements is true?
Animals cannot make their own food because they do not have vacuoles.
When you eat a carrot, you are eating ground tissue.
The main function of dermal tissue is photosynthesis.
The cerebrum controlls balance and coordination.
Answers
Answer:
when eating a carrot u r eating ground tissue
Answer:
when you eat a carrot, you are eating ground tissue is your answer
Explanation:
hope it helps
sorry i'm late to
The_____ side of a sand dune is the side without wind.
O deflation
slip face
Owindward
Oshear
Answers
Answer:
slip face is the answer
Answer:
Slip face
Explanation:
The two sides of a sand dune are the windward side and the slip face side. The slip face side is the side without wind. Accumulation of sand occurs on the windward side.
Which one is right??
Answers
Answer: A
Explanation:
which of the following statements describes a proton of an atom?
a. has a negative charge and is located in the nucleus
b. has a positive charge and is located in outer energy levels
c. has no charge and is located in the nucleus
d. has a positive charge and is located in the nucleus
Answers
Answer:
d. Has a positive charge and is located in the nucleus
Memory technique:
Think of the "p" and proton and the "p" in positive.
Think of the "neu" in neutron and "neu" in neutral.
Think about electrons and electricity. Touching something "elec"tric would hurt, or give you negative feelings.
Electrons revolve around the cell while protons and neutrons are a part of the nucleus because negative and positive things would not get along.
That's all I have! I hope this helps with your studying. Happy learning, friend! :)
help! i really need help on a, b, c, d, e, f!
Answers
Answer:
a) 12 brown eyes
b) 12 brown hair
c) 3 Brown eyes blonde hair
d) 9 brown eyes brown hair
e) 3 blue eyes brown hair
f) 1 blue eyes blonde hair
what element is in period 6, group 17
Answers
It is element At, or Astatine. Number 85 on the periodic table
the part that form of fruit after fertilization
Answers
Answer:
Ovules
Explanation:
After fertilization occurs, each ovule develops into a seed. Each seed contains a tiny, undeveloped plant called an embryo. The ovary surrounding the ovules develops into a fruit that contains one or more seeds.
Hope this Helps
what is short transfer cell in the tip of leaf?