Briefly explain how cell differentiation and cell death are both needed to develop such structures as human hands and feet.

Answers

Answer 1

Answer:

Apoptosis also plays a key role in human development. For instance, as we saw in the introduction, your hand started out as a paddle-like block of tissue when you were an embryo. The block was “carved” into fingers by apoptosis of the cells in between the developing fingers.

Explanation:


Related Questions


Fossil evidence shows that toothed leaves were present in Bighorn basin during the
Paleocene and Eocene, but not during the PETM. Which of the following explains the
changes in the fossils over this time?

Answers

Answer:

Did anybody answer this question? I'm taking the biology exam and I need help with this question.

Explanation:

Which of the following is a strategy for controlling water pollution?

A: Using more salt on roads during snow and ice storms
B: Reducing natural wetlands by filling them in
C: Discharging hazardous chemicals directly into rivers
D: Identifying storm drains and placing signs on them to remind people not to dump chemicals in them

Answers

Answer:

D: Identifying storm drains and placing signs on them to remind people not to dump chemicals in them

Explanation:

Water pollution is the contamination of water either consciously or unconsciously.

From the options, the correct answer is Option D.

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Since, mainly water pollution is caused by the waste chemicals that come out from factory. So, we should discharge factories that they shouldn't directly pass the chemical into rivers.

[tex]\pink\star[/tex]C: Discharging hazardous chemicals directly into rivers. So option (C) is correct.

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How does biotechnology use viruses and bacteria?
to copy a specific antigen
to produce proteins for human consumption
to respond to and destroy cancer cells in humans
as a carrier to insert a desired DNA segment into an organism

Answers

to produce proteins for human consumption!!

what is tye effect of high concentration of O2 on respiration​

Answers

Prolonged exposure to above-normal oxygen partial pressures, or shorter exposures to very high partial pressures, can cause oxidative damage to cell membranes, collapse of the alveoli in the lungs, retinal detachment, and seizures.

After coming to the U.S., Ling-Chen learned English quickly and totally immersed herself in the American life. She prefers to be with her new American friends and is annoyed by her parents' continued ties to their native culture. Ling-Chen's pattern of acculturation would be classified as​

Answers

Answer:

assimilation

Explanation:

Cultural assimilation is defined as the process by which a minority group  adopts the values and ways of a majority group.

What are genes?

A. alleles that show the expression of one gene from
another

B. the specific sequences of DNA in an organism

C. small subtle changes in a person

D. dominant alleles that are expressed

Answers

Answer:

I believe it is b

Explanation:

I may be incorrect but genetics and natural selection are my passion so I believe this is correct. The way genes work is you receive half of your father's genes and half of your mothers. Whichever genes are dominant end up showing up on your body, which is called a phenotype. DNA is what makes up genes and makes them able to affect you. Let me know if I'm incorrect.

what is dendritic cells and difference between dendritic cells and glial cell

Answers

Answer:

here--->

Explanation:

Dendritic cells (DC) are the professional antigen-presenting cells of the immune system. In their quiescent and mature form, the presentation of self-antigens by DC leads to tolerance; whereas, antigen presentation by mature DC, after stimulation by pathogen-associated molecular patterns, leads to the onset of antigen-specific immunity. DC has been found in many of the major organs in mammals (e.g. skin, heart, lungs, intestines, and spleen), while the brain has long been considered devoid of DC in the absence of neuroinflammation. Consequently, microglia, the resident immune cell of the brain, has been charged with many functional attributes commonly ascribed to DC.  

What are potential impacts of using plastic digesting wax worms

Answers

Answer:

Wax worms, the larvae forms of moths such as Lesser wax moth (Achroia grisella), Greater wax moth (Galleria mellonella), and Indian meal moth (Plodia interpunctella), were recently discovered to be plastic-eaters. They are called wax worms because they are known to ingest beeswax. It was found that beeswax and polyethylene, that is present in plastic bags, plastic bottles, etc. have the same chemical composition.

Explanation:

difference between homologous and analogous organs ​

Answers

Hi!Homologous structures share an identical embryonic origin; analogous organs have an identical function.

Answer:

Hope these two pics help, I actually don't know what that is, but I think I do now, I got this from the internet, hope this helps

If you examined the cells of a pigs snout under a microscope, you would see a firm ground substance with tiny cells called

Answers

Answer:

lacuna

Explanation:

cartilage connective tissue has lacuna

The tissue characteristically has spaces or chambers called lacuna (lacunae, pl.)

http://faculty.gordonstate.edu

This photo shows a kind of reproduction.
Which statement describes the result of this type of reproduction?

Two parents are required to produce the offspring.
Each offspring has a different combination of genes.
Parents make reproductive cells with only half of their genes.
The offspring have identical genes.

Answers

Answer:

I don't know

Explanation:

I think the answer???

Pls help, I don't know the answer! Leave out the : and % sign.

Answers

Given,

H = brown hair

h = red hair

Mother: Hh (heterozygous It’s given)

Father: hh (homozygous, given)

What is homogeneous and heterogeneous?

Homozygous means alike allele whereas heterozygous means unalike or distinct from one another.

So, in the punnet square below, it is shown that there is a 50/50 chance for the offspring to have red hair.

Ratio is 1:1.

But there is also another probability for the offspring to be like their mother, have the dominant gene of black hair overruling the recessive gene of red hair.

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In which location is glucose formed?
O Location A
O Location B
O Location C
O Location D

Answers

b because it looks like the stroma, where the calvin cycle occurs

Answer:

B is the answer

Explanation:

If you see the white parts

Use the arrow on the picture and the scale to estimate the length of the chloroplast

Answers

Answer:

where's the pic?

Explanation:

50 points! Pls help asap! Chapter 28 concept mapping introduction to animals
Numbered for easy answering

Answers

Some animal features include multicellularity, motility, heterotrophy, a se_xual mode of reproduction, etc.

What are animal features?

The expression 'animal features' makes reference to the phenotypic and genotypic characteristics shared by organisms from the Animalia kingdom.

Heterotrophy refers to the fact that animals are unable to synthesize their own food and must eat other organisms to survive.

In conclusion, some animal features include multicellularity, motility, heterotrophy, a se_xual mode of reproduction, etc.

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Which is one of the characteristics that Mars and earth share

Answers

Answer:

They both have water, semi-regular temperatures, and mars has a partially livable atmosphere.

Answer:

Temperature and atmosphere

Explanation:

The geological processes in mars and earth are common

Examples formation of Volcanoes

1. How is a food chain different from a food pyramid?

Answers

Answer:

What are some differences between a food chain, web, or energy pyramid? Food chains show a limited feeding relationship between only a few organisms. Energy pyramid is the visual representation of the amount of energy, population, or biomass at each trophic level.

Answer:

A food chain represents the linear relationship between organisms for food. On the other hand, a food pyramid represents the optimal number of servings to be eaten each day from each of the basic food groups

Explanation:

Putting your coat on when it is cold outside is a behavior that is maintained by:
O Negative Reinforcement
O Omission Training/Time out
O Punishment
O Positive Reinforcement

Answers

Answer:

O Negative Reinforcement

Explanation:

Negative reinforcement removes something problematic as a reward. Thus, wearing a coat when it colds removes the negative thing (cold) when person walks out

1-3. How is
this related to
evolution?

Answers

Answer:

-2

Explanation:

If it's a math question this is it.

What are the two features that result from deposition of groundwater?
P.S please make it simple thx

Answers

Answer:

minerals may then be deposited, for example, as stalagmites or stalactites

The water dissolves and carries away the solid rock gradually enlarging the cracks, eventually forming a cave. Ground water carries the dissolved minerals in solution.

Explanation:

Ground water is a strong erosional force, as it works to dissolve away solid rock. Carbonic acid is especially good at dissolving the rock limestone. Working slowly over many years, ground water travels along small cracks.

12 12
Distinguish between the terms life expectancy
and life span. Explain why one of these has
changed significantly over the past century and
the other has not. Your initial post should be 3-4
paragraphs in length. Use at least three sources
to research your answers. Remember to cite
your sources within your posting and list the full
citations at the end. You will also need to

Answers

Answer:

life expectancy is the period one is expected to live and life span is the years one has lived

Which main plant tissue are the lines pointing to in the enlarged diagram? dermal ground vascular meristem

Answers

Answer:

ground

Explanation:

I took the test and got it right. Any one els is summer school?

The plant tissue that is pointed out by the lines in the enlarged diagram is ground tissue. Therefore, option B is correct.

What are ground tissues?

Ground tissues are one of the three types of plant tissues. The other two tissues are dermal and vascular tissues. Ground tissues are responsible for most of the metabolic functions of the plant, including photosynthesis, storage, and support.

Ground tissues are composed of several different types of cells: parenchyma, collenchyma, and sclerenchyma. Parenchyma cells are the most common type of ground tissue cells. They are responsible for photosynthesis, storage, and gas exchange.

Collenchyma cells provide support to growing parts of the plant. Sclerenchyma cells provide structural support to mature parts of the plant. Thus, option B is correct.

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Your question is incomplete, most probably the full question is this:

Which main plant tissue are the lines pointing to in the enlarged diagram?

A. Dermal

B. Ground

C. Vascular

D. Meristem

The image is attached below.


Which portion of The United states is at a high risk for hurricanes?
O Great lakes
O Desert southwest
O West coast
East Coast

Answers

Answer:

The west coast/east coast because hurricanes happen in marine tropic tectonic plates that also cause heavy tropical storms,tsunamis, and hurricanes. So therefore hurricanes apear in west and east coast.

Explanation:

Sensory _____________ respond to stimuli by sending messages to the brain A. Nerve cells, or __________ , are the basic units of the nervous system

Answers

Answer:

Sensory _____________ respond to stimuli by sending messages to the brain A.

Organs

Nerve cells, or __________ , are the basic units of the nervous system.

Neurons

Overall, bottle bills have not been a very successful financial incentive to reduce waste.

True
False

Answers

Answer:

false

Explanation:

what is the correct way to write the scientific name of the mustard ? pls help me to solve this problems.​

Answers

Answer:

Sinapis alba. (Yellow mustard)

The scientific name of yellow mustard is Sinapsis alba and that of Indian mustard is Brassica juncea.

What is the scientific name?

The scientific name is the name that is accepted internationally as the name of the organism.

What is the need of a scientific name?An organism in different part of the world is known by different names therefore it creates a confusion.Hence a common name is accepted universally as the scientific name of that organism.What is binomial nomenclature?It is a system of naming species by giving them two parts.One is known as the generic name and the other is known as the species name.What are the rules to write a scientific name?The generic name should begin with the capital letter while the species name begins with the small letter.The names are always written in italics.The species name is never capitalized.

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Which types muscles are controlled by the autonomic nervous system?

Answers

Answer:

Smooth Muscle

Explanation:

They are under the control of the autonomixlc nervous system , and contraction or relaxation of the muscle cells. in which case control of the blood pressure, motility of the digestive, respiratory and urinary tracts and secretion.

Soil texture is determined by the amount and distribution of mineral particles.


Please select the best answer from the choices provided

T
F

Answers

Answer:

The answer is trueeeeee

Explanation:

Answer:

t

Explanation:

Which hypothesis is testable?

Answers

It is feasible to make observations that agree or disagree with a theory if it is testable. A theory is not scientific if it cannot be tested by observation.

witch best describs the theroy of evlotion

Answers

Charles Darwin’s theory of evolution states that evolution occurs by natural selection. Individuals in a species shows variation in physical characteristics. This variation is because of the differences in their genes.

What is evolution?

Evolution is the process by which species adapt over time in response to their changing environment.

Individuals with characteristics best match to their environment are more likely to survive, finding food, avoiding predators and resisting disease. These individuals are more likely to reproduce and pass their genes on to their children.

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When a teacher shows the children the appropriate behavior to use during socio-dramatic play, the teacher is engaging in what vocab word? family consumer science Critical thinking comes naturally to everyone. please select the best answer from the choices provided t f Which processes involve the production of identical daughter cells what are five more important economic indicators? "I was told I would receive a 15% credit on the fee to activate my service but I was still charged $50.00." Price controls are sometimes used when the natural operation of free markets leads to: positive externalities. undesirable outcomes. an efficient distribution of goods. a trade deficit. What is the difference betweenlongitudinal waves that havedifferent amplitudes? Positive feedback will not help your team feel motivated and engaged in their work or help them understand your company's standard True or false? 5. Which of these is a non-monetary positive incentive for entrepreneurs?*1 pointthe need to hire and train workersthe satisfaction of being your own bossthe risks of starting a new enterprisethe responsibilities of running a business if sylvia gonzales tells you that she ate breakfast before coming in for the test, what should you do? Quote four consecutive words to prove that the following statement is false :Aisha does not pressure Linda to follow her to the city S4. In a bag there are letter squares that spell the word ATTITUDE. If you randomly pick two letters, what isthe P(not a vowel, and T) if the letters are not replaced. What is the dictionary or literal meaning of a word?. Elizabeth bishop is known as a poet of place. she uses details to help the reader feel as though they are really there. discuss the details she uses in this poem to help the reader feel as though they are witnessing the air force band playing at the white house first hand. Please help Which idea best completes this list? Select the best answer from the choices below.Colonies sent raw materials back to their mother countriesThe mother country sent back finished goods, such as textiles and toolsThe colonists could purchase these goods only from the mother country(A) Nations had to gather wealth by mining these raw materials from their colonies(B) Trading overseas was very expensive, which led to new ways of doing business in Europe(C) The economic philosophy of mercantilism prohibited free trade(D) Merchants needed to buy goods at low prices so they could make money by selling them for higher prices in other countries 4 + root 3 / 4 - root 3 type of adjectival clauses and their function in the sentence Which of the following is WORST for the environment?A: ReduceB: ReuseC: RecycleD: Throw away 9,390 chairs at 1,565 tables = chairs per table A tire company measures the tread on newly-produced tires and finds that they are normally distributed with a mean depth of 0.98mm and a standard deviation of 0.35mm. Find the probability that a randomly selected tire will have a depth less than 0.50mm. Would this outcome warrant a refund (meaning that it would be unusual)?