Answer:
Blood cells are responsible for constant maintenance and immune protection of every cell type of the body. This relentless and brutal work requires that blood cells, along with skin cells, have the greatest powers of self-renewal of any adult tissue.
The stem cells that form blood and immune cells are known as hematopoietic stem cells (HSCs). They are ultimately responsible for the constant renewal of blood—the production of billions of new blood cells each day. Physicians and basic researchers have known and capitalized on this fact for more than 50 years in treating many diseases. The first evidence and definition of blood-forming stem cells came from studies of people exposed to lethal doses of radiation in 1945.
Explanation:
Chromosome number is half of original cell is it mitosis or meiosis
Answer:
Meiosis
Explanation:
meiosis gives rise to four unique daughter cells, each of which has half the number of chromosomes as the parent cell.
Help please (the subject is science)
Answer:
Hi!
Epithelial cells (I believe) Nervous SystemSkeletal SystemExplanation:
Epithelial tissue helps cover your "exterior sources". Therefore I'm pretty sure the first one is Epithelial cells.The Nervous System has to do with sense of feeling or sense of touch mostly. The Nervous System controls everything you do! ex. touching a table uses the nervous system.The Skeletal System helps your body move and supports a lot of different things in your body. All of those other options are not correct just because they do not support. Here is what I mean in the shortest way possible:Circulatory- has to do with your lungsLymphatic- involves a network of vesselsExcretory- elimination of wasteTherefore these are your answers #1, #2, and #3.
Hope this helps!
13. What is macroevolution?
genetic changes among and within populations
minor changes in populations over a long time
changes in a population's allele frequencies
major changes in populations over a long time
Answer: Evolution is a process that results in changes in the genetic material of a population over time. ... Microevolution reflects changes in DNA sequences and allele frequencies within a species over time. These changes may be due to mutations, which can introduce new alleles into a population.
What nucleus is the final product
Answer:
beta
Explanation:
The characteristic of life that represents birds migrating to the south is
Answer:
Living things respond to their enviorment.
Explanation:
Hope that helped!
Select the correct answer.
Why might two elements possess similar chemical properties?
OA. They belong to the same group of the periodic table.
OB. They have the same physical state.
OC. They have similar physical properties.
OD. They belong to the same period of the periodic table.
Answer:
The answer is A.
Explanation:
I've just answered it.
Answer:
A. They belong to the same group of the periodic table.
Which of the following is created from amino acids linking together?
A. Carbon chains
B. Lipids
C. Polypeptide chains
D. Monomers
Every winter, Alice notices that the monarch butterflies seem to disappear from her backyard garden. Then, the butterflies return to her garden each spring. Which best describes the butterflies' behavior? migration, which is a response to an external stimulus migration, which is a response to an internal stimulus flight, which is a response to an external stimulus flight, which is a response to an internal stimulus
Answer:
migration, which is a response to an external stimulus
Explanation:
The butterflies were migrating in response to external stimuli.
Migration is the movement of organisms from one place to another in response to external stimuli. The stimuli could be for food, shelter, weather, etc.
Flight in response to external stimuli is often due to the presence of danger as stimuli. The adrenal gland releases epinephrine which triggers physiological changes in the body and makes the organism decide whether to run, stay, or fight.
In this case, the butterfly could have been migrating in response to the availability of flower nectars or pollen which serve as food for them. Once flowers are available during the spring, the butterflies come around and when the winter comes and the flowers disappear, they migrate away.
Answer:
A
Explanation:
migration, which is a response to an external stimulus
How are some protists like plants
Answer:
Plant-like protists are autotrophs. This means that they produce their own food. They perform photosynthesis to produce sugar by using carbon dioxide and water, and the energy from sunlight, just like plants. ... Protists can be unicellular (single-celled) or multicellular (many-celled).
Explanation:
I took the same test on this
A swimming pool holds 2,640,000 quarts of water.
How many gallons does it hold?
In an _________, dots around an element's symbol indicate the number of valence electrons in an atom.
Answer:
Bohr Diagram
Explanation:
Is a Diagram where you put the element in the middle and rings with dots around the outside representing shells and the number of electrons. Almost always taught at middle school/High school.
How does water cause frost wedging?
A
Water attracts lightning, which breaks apart huge boulders into many smaller pieces.
B
Water carries sediment to large rocks, causing them to rub against each other.
C
Water freezes and thaws inside rock cracks, causing them to widen and then split.
D
Water slowly wears down a rock’s sharp edges, leaving behind a smooth surface.
Answer:
C. Water freezes and thaws inside rock cracks, causing them to widen and then split.
Explanation:
When water gets in the crack at the bottom and freezes, frost wedging occurs.
Frost wedging happens when water gets in crack, freezes, and expands. This process breaks rocks apart. When this process is repeated, cracks in rocks get bigger and bigger (see diagram below) and may fracture, or break, the rock.
which kind of electrical charge is found on a hydrogen atom of a polar water molcule?
Answer:
he two hydrogen atoms and one oxygen atom within water molecules (H2O) form polar covalent bonds. While there is no net charge to a water molecule, the polarity of water creates a slightly positive charge on hydrogen and a slightly negative charge on oxygen, contributing to water's properties of attraction
Explanation:
first to help gets BRAINLIEST!!!!!!!!!!
Which occurrence would contradict the big bang theory?
A.
The percentage of carbon dioxide in Earth’s atmosphere increases.
B.
Scientists discover that 99% of the universe’s mass is hydrogen.
C.
A radio telescope detects microwave radiation in space.
D.
Distant galaxies move progressively farther away from Earth.
Answer:
D. Distant galaxies move progressively farther away from Earth.
Plz Help!!!
Which fossil fuel has had the most significant influence on human transportation over the last century? (1 point) hydrogen coal natural gas petroleum
Answer:
Petroleum.
Explanation:
I was also thinking natural gas but petroleum has had more of an influence on transportation and has been used more.
Answer: D. Petroleum
Explanation: Petroleum, or crude oil, is another fossil fuel that has had a significant influence on human activity. Petroleum is a liquid found beneath Earth's surface. It can mined or drilled and refined into products including gasoline and diesel oil. It is the largest source for energy consumption in the United States. Hope this helps! ^_^
Which of the following can occur because of the exchange of homologous chromosome parts during the process of meiosis?
Answer:
Muttation can occur during the exchange of genetic meterial from homologous chromosomes which may led to cause deseases in some cases.
Explanation:
Homologous chromosomes exchange genetic material during the process of meiosis.
What is Meiosis?Meiosis is a type of cell division in which germ cells present in the sexually-reproducing organisms produces the gametes, such as sperm or egg cells. It involves two rounds of division which results in four cells with only one copy of each chromosome.
These four cells are haploid in nature. Meiosis produces the sex cells or gametes like eggs in females and sperm in males.
Meiosis is divided into nine stages. These are divided between the first time the cell divides (meiosis I) and the second time it divides (meiosis II).
Thus, homologous chromosomes exchange genetic material during the process of meiosis.
Learn more about Meiosis, here:
https://brainly.com/question/29383386
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How are the tongue, ears, and nose a part of the nervous system?
Answer:
Option A
Explanation:
Options:
A) They are sense organs that are part of the central nervous system.
B) They are sense organs that are part of the peripheral nervous system.
C) They are internal organs that are part of the central nervous system.
D) They are internal organs that are part of the peripheral nervous system.
The answer is option A or "they are sense organs that are part of the central nervous system." Remember that tongue, ears, and nose are all senses and that they are connected to the central nervous system so when you smell, taste, or hear something your nervous system sends a message to your brain about what it is. In a way it's the same as feeling pain, pain is inflicted on the body and then your nerves on where the pain is located send a message to your brain letting it know that it's hurting.
Hope this helps.
I will give brainiest to who answer please fast
Answer:
i dont understand
Explanation:
its too complex i will edit my answer i you tell me more bout dis
RLLYY NEED HELP WITH DIS ONE ASAPPP !!
Answer:
False
Explanation:
explain the purpose of dna
Answer:
Deoxyribonucleic acid (DNA) is a nucleic acid that contains the genetic instructions for the development and function of living things. All known cellular life and some viruses contain DNA. The main role of DNA in the cell is the long-term storage of information.
Explanation:
A student observes that a popcorn kernel has a hard coat. He places the kernel in a moist paper towel and observes it for several days. He notices that the coat splits and a small root emerges. He concludes that—
water outside the seed coat exerted a pushing force, breaking the seed coat
air inside the seed coat exerted a pushing force, breaking the seed.
water outside the seed coat exerted a pulling force, breaking the seed coat.
gravity exerted a pulling force on the stem, breaking the seed coat.
Answer:
d
Explanation:
got it right on the test
I knew a woman who was a cop and had a taser man! she was stunning
Answer:
lol best cop pun i've herd yet
Explanation:
i told my friend 10 jokes to make him laugh, but unfortunately no pun in 10 did
Discuss at least 3 ways that animals move.
Answer:
Walk, fly, and swim.
Explanation:
Please mark brainliest i'm only 2 away from getting a new rank. Thank you!
have a blessed day!
i need help please
i didn’t really understand but i put the text boxes in circles now , please help i’ll give brainlest!
Answer:
Explanation:everything looks good
Answer:
its converted transformed destoryed matter
Explanation:
Gita tested butter and bread with iodine solution. Which nutrient was she testing for?
Answer:
an iodine test for starch
She is testing for the presence of Starch.
The iodine test is a chemical reaction which checks for the presence of starch on food substances with the use of iodine solution (0.1 M potassium triiodide solution) as the reagent.
The procedure follows as
Add few grams of the crushed solid food sample or use a spatula to hold a piece of food sample (bread) Add about 3-5 drops of iodine solution to the sample Observe any color changes.1. If no change occurs that means the Iodine still remains brown then no starch is present
2. If a blue black coloration is formed, then presence of starch is confirmed.
See related answer here:https://brainly.com/question/23961023
ANSWER QUICK PLS I WILL GIVE BRAINLYIST
At what point should health officials have started to control the spread of Ebola in West Africa? It needs to be an essay.
What roles do DNA and chromosomes play in the coding of instructions for the inheritance of traits, or joe traits passed on parents to offspring?
Answer:
I really hope this helps
DNA is the vital for all living beings. even plants. it is important for inheritance, coding for proteins and the genetic instruction guide for life and its processes. DNA holds the instructions for an organisms or each cells development and reproduction and ultimately death.
Each chromosome consists of a single, very long DNA molecule, and each gene on the chromosome is a particular segment of that DNA. the instructions for forming species characteristics are carried in DNA.
In my science class we just got done learning this so it should be correct.
How many moles are in 15 grams of Lithium?
2.16 grams
104.1 moles
2.16 moles
104.1 grams
When a pinecone is open, it disperses its seeds. Based on your experiment, can you tell what weather conditions are needed for pine trees to release their seeds? Explain your answer.
Answer:
If a pine seed finds the right micro-climate, it will eventually sprout and a pine seedling will start to grow. However, pine seeds are usually released in a dormant state, which is most often broken by cold stratification. As a result, a pine seed will not sprout until the following spring when warm weather and some spring moisture are present.
Explanation:
hope it helps
Answer:
hi
Explanation:
Cellular respiration and photosynthesis form the basis of the __________.
Group of answer choices
A) water cycle
B) biomass
C) nitrogen cycle
D) carbon cycle
