What is the relationship between T cells and stem cells?.
Answer:
T cells are born from hematopoietic stem cells, found in the bone marrow. Developing T cells then migrate to the thymus gland to develop (or mature). T cells derive their name from the thymus.
Explanation:
Summarize the definition of genetic engineering
Genetic engineering is the process of using recombinant DNA (rDNA) technology to alter the genetic makeup of an organism.
Q - Describe the Mitoses with the help of diagram. write its different phares and explain them.
Answer:
Mitosis is a type of cell division in which single haploid cell (n) or diploid cell (2n) divides into two haploid or diploid daughter cells that are same as the parent.
Mitosis occurs in somatic cells of plants and animals. In this cell division, the two daughter cells have the same number of chromosomes as that in the parent cells.
Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase.
1.Prophase:-
It is the first visible stage in karyokinesis. The chromosomes appear as long coiled threads called chromatids. The chromatin becomes shorter, thicker and visible due to the condensation of DNA. The chromatins are now called chromosomes. Stainability of nucleus increase. Each chromosome starts to splits longitudinally into two sister chromatids. These sister chromatids are attached to each other at the centromere. The nuclear membrane and nucleolus start to disappear and by the end, it will be completely disappeared.
ii. Metaphase:-
Nuclear membrane and nucleolus completely disappears and simultaneously appearance of spindle fibers. Spindle fibers are attached to the centromere of a chromosome. The chromosomes are arranged on the equatorial plane. The process of gathering of chromosomes in equator is called congressional and plate formed is called metaphasic plate.
iii. Anaphase:-
The centromere of each chromosome splits into two sister chromatids and forms two daughter chromosomes. The daughter chromosomes are pulled towards the poles due to the contraction of spindle fibres and stretching of interzonal fibers. During polar movement, the chromosomes show different shapes i.e. J, U, V, L or I shaped in appearance. At the end of anaphase, each pole will get one set of daughter chromosomes. It is the shortest phase and is also known as a migratory phase.
iv. Telophase:- The daughter chromosomes reach respective poles and uncoil and become thin, long and visible. The spindle fibres start disappearing and finally disappear. The nuclear membrane and the nucleolus reappear.
Two nuclei are formed at the end of telophase. Both the nuclei have the same number of chromosome as the parent cell. It is the last visible stage of karyokinetic and is also known as reorganization phase.
It is followed by cytokines or division of cytoplasm.
Explanation:
In a Punnett Square, the recessive character or allele is represented by:
A: Capital letter
B: Lower case letter
C: Both capital and lower case letters
Answer:
B. lowercase letter
Explanation:
In a Punnet square, the dominant allele is capital and the recessive allele is lowercase.
can an unfertilized egg develop into a human
Answer:
it's not possible till now bio science
An unfertilized egg cannot develop into a human.
WHAT IS FERTILIZATION?Fertilization is the process by which the sperm of a male organism fuses with the egg of a female organism to form a zygote, which then develops into a whole organism.
This suggests that to develop into a full grown organism, it takes an egg to be fertilized by a sperm.
Therefore, an unfertilized egg cannot develop into a human.
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Is it possible male with type A blood and a woman with type AB blood have a child with type AB blood. why or why not
Answer:
Yes
Explanation:
The child will automatically get type A from father, but the mothers genes would have to give the B. If the mother gives type A, then the child will have type A.
A A
A AA AA
B AB AB
That is my attempt of showing the punnett square on brainly but yea if you draw a punnet square you can see that it is a 50/ 50 chance.
A cell with a diploid number of twelve chromosomes undergoes meiosis. What will be the product at the end of meiosis?.
Answer:
The gametes are haploid, having half the number of cells as compared to somatic cells. The gametes or s#x cells produced by the organism will have 6 chromosomes if the organism has 12 chromosomes.
IF there were a membrane separating two solutions one with 80% solute and the other with 20% solute, in which direction through the membrane will water move to?
toward the 20% solute side of the membrane
toward the 80% solute side of the membrane
Answer:
toward the 20% solute side of the membrane
Explanation:
that is the process of osmosis, in which the water moves in the direction that tends to equalize the solute concentrations on the two sides.
Basically it's to make it 50% 50%, so the water moves to the 20% solute side to raise the %
I hope it's clear enough.
What percentage of our bodies is made up of water?.
When will a dominant trait show its effect?
a
A) When two recessive genes for a trait are present.
B) Even if no dominant genes for that trait are present
C) In the presence of one dominant gene
D) Only if the mother has the trait.
When will a dominant trait show its effect in the presence of one dominant gene.
This goes to say that a dominant trait will show its effect even when individual only has one copy of the allele.
Q)Please select the word from the list that best fits the definition
Choose the correct process for the description given:
does not require light
O). cellular respiration
0). Photosynthesis
Answer:
It is Cellular respiration
Hopes this helps.
When a neurotransmitter binds a protein channel, it opens and lets sodium diffuse down its concentration gradient. This is an example of a.
What are other small ecosystems that are parts of larger ones?
Answer:
I think maybe its enzymes?
Q. Can you define Isotonic and hypertonic solutions?.
Hypothesize the importance of language to the early modern humans and how it might have contributed to their success.
Answer:
Human language is unique among all forms of animal communication. It is unlikely that any other species, including our close genetic cousins the Neanderthals, ever had language, and so-called sign ‘language’ in Great Apes is nothing like human language. Language evolution shares many features with biological evolution, and this has made it useful for tracing recent human history and for studying how culture evolves among groups of people with related languages. A case can be made that language has played a more important role in our species’ recent (circa last 200,000 years) evolution than have our genes.
Explanation:
hope it helps
Coastal regions experience moderate temperatures because winds prevent extreme temperatures in these regions. Which direction of wind makes these moderate temperatures possible?.
Answer:
b. from the ocean to the land
The direction of the wind that makes the moderate temperature in the coastal regions is from the sea to the land during the day, and from land to the sea during the night.
What do you mean by Coastal regions?The coastal regions may be defined as the area of land that borders the water bodies such as the sea.
The temperature of the coastal regions always remains moderate. This is because of the direction of the wind. The direction of the wind may change during the day as well as the nighttime.
Therefore, the direction of the wind that makes the moderate temperature in the coastal regions is from the sea to the land during the day, and from land to the sea during the night.
To learn more about Coastal regions, refer to the link:
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What sorts of adaptations do prey have for avoiding predators?.
Answer:
Prey Defense
Explanation:
Many prey animals may have camouflage, highly developed senses, warning signals, and different defensive weapons and behaviors are all used by prey animals for survival.
hope it helps
HELP I need the bottom three
a and b are the best solution
The loss of beneficial insects, those that keep pest populations down, has been attributed to ______.
Weathering breaks rock into sediments. Water, wind, and moving ice carry away the
sediments in a process called ______
Please hurry
Explain the connections among air pressure, temperature, humidity, and fronts.
Air mass is a large body of air that exhibits uniform temperature and moisture characteristics and helps to determine the weather within an area. Warm air masses tend to form over oceans in warm-temperature regions of the tropics and sub-tropics, while cold air masses tend to form over land in cold-weather regions nearer the poles. The cold air masses that form at the poles move toward the equator, while the warm air masses that form at the equator move toward the poles. These air masses can undergo gradual, but significant, changes as they pass over warmer or colder land surfaces encountering different types of air. These boundary lines are called front.
Brainliest would be appreciated.
7. What causes greenhouse gasses to absorb heat when gasses like oxygen do not?
Answer:
Hope the below helps!
Explanation:
Greenhouse gases (such as methane, carbon dioxide etc) have lots of vibrating particles. These molecules eventually release radiation, which travels up Earth's atmosphere (because warm air rises), is trapped and adds to the greenhouse gas effect.
Oxygen and nitrogen don't interfere with infrared waves in the atmosphere. That's because molecules are picky about the range of wavelengths that they interact with.
I have attached a diagram that shows the greenhouse effect. It might help to visualise this.
Answer:
This is due to the Greenhouse Effect.
Explanation:
The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and some is absorbed and re-radiated by greenhouse gases. The absorbed energy warms the atmosphere and the surface of the Earth.As the heat makes its way through the atmosphere and back out to space, greenhouse gases absorb much of it.
Why do greenhouse gases absorb heat?
Greenhouse gases are more complex than other gas molecules in the atmosphere, with a structure that can absorb heat. They radiate the heat back to the Earth's surface, to another greenhouse gas molecule, or out to space. Here are several different types of greenhouse gases. The major ones are carbon dioxide, water vapor, methane, and nitrous oxide. These gas molecules all are made of three or more atoms compared to oxygen which only has 2 atoms. I hope this helps you. Have a good rest of your day!
It is Lizeth’s first day of her new job at a medical office. Her supervisor is showing her how to operate the medical billing software. In which area of study would Lizeth have likely learned about medical billing software? biology ethics chemistry computer training
Answer:
Computer Training
Explanation:
Because since its computers, she mainly dealt with software.
Answer:
D
Explanation:
Which are advantages of using wind energy and solar energy as renewable resources instead of using nonrenewable resources such as fossil fuels?
Wind energy and solar energy is less expensive over time.
Wind energy and solar energy can be reused infinitely over time.
Wind energy and solar energy produce less waste than fossil fuels.
All of the above
Answer:
All Of the Above
Explanation:
Hope it Helps!!!!!
Answer:
all of the above
Explanation:
i cheat on all my tests :P
Write a short paragraph on the hearing and seeing capacity of a horse
Answer
Their vision is better than their hearing. Hearing serves the same role in all …
Body language is key to communication. As prey animals, horses prefer to …
Their ears can rotate independently up to 180 degrees. Like all mammals, a …
Their ears tell a story. Horses’ ears are primarily for hearing
According to Thomas Malthus, the rate of population growth is _____, while the rate of subsistence growth is _____.
Answer:
Population Growth: Exponential
Subsistence Growth: Arithmetic
Explanation:
Thomas Malthus was kind of a pessimist. His theory says basically we will run out of food and die. People grow like this equation: 2^x while food grows like this equation: 2x. So if you understand that it explains it.
PS: is this a biology question??? i remember learning this in AP Human Geography
Why are the spores produced on the underside of the fronds?.
Explanation:
Each sporangium is a capsule that contains spores. They are usually aggregated into clusters called sori. The position and arrangement of the sporangia are very important for the identification of ferns. Fronds that have sporangia on their underside are fertile, and those that don't are sterile Ferns don't have seeds; they have spores. The spores are usually on the underside of the fronds. To reproduce, the fern releases the spores into the air. The spores don't grow into new ferns.
Sporangiums are spore-containing capsules. They form sori clusters. Ferns are identified by their sporangia position and arrangement. Fertile fronds have sporangia, whereas sterile ones don't.
What are fern fronds?Each sporangium is a spore-filled capsule. Typically, they are gathered into sori, or clusters. For the purpose of identifying ferns, the placement and arrangement of the sporangia is crucial. When a frond has sporangia on the underside, it is fertile; otherwise, it is sterile. Ferns produce spores rather than seeds. Usually, the underside of the fronds is where the spores are found. The fern disperses the spores into the atmosphere to reproduce.
Pteridophytes, including ferns, originated before flowering plants. They reproduce using spores rather than seeds. These spores mature and are then ejected from the capsule, where they germinate to become prothallus, a gametophyte that produces gametes.
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A daughter is talking with the urologist who is caring for the woman's 78-year-old mother. The mother has multiple sclerosis and has lost control of her bladder. The young woman asks the urologist what made her mother become incontinent. What would be the urologist's best answer
"Once control of the bladder is learned, you must have a functioning nervous system to maintain it."
Traits controlled by genes on the x-chromosome are said to be.
Answer:
These traits are called X-linked traits.
a plant cell has a 5% salt concentration. It is placed into a solution containing a 12% salt concentration. what will happen to the plant cell
