Find out more about bone marrow transplants. What other diseases can be treated using a a bone marrow transplant? What is the National Marrow Donor Program?

Answer:

Germ cells are highly specialized cells that form gametes, and they are the only cells within an organism that contribute genes to offspring. Germline stem cells (GSCs) sustain gamete production, both oogenesis (egg production) and spermatogenesis (sperm production), in many organisms. Since the genetic information contained within germ cells is passed from generation to generation, the germ line is often referred to as immortal. Therefore, it is possible that germ cells possess unique strategies to protect and transmit the genetic information contained within them indefinitely. On the other hand, it was shown that germ cells are pluripotent in all stages of development. We and other groups succeeded in the long-term culture of spermatogonial stem cells (SSCs) of mice. The cells were phenotypically similar to the ES/embryonic germ cells except for their genomic imprinting pattern. They differentiated into various types of somatic cells in vitro under the conditions used to induce the differentiation of the ES cells, and the SSCs formed germline chimeras when injected into blastocysts. Furthermore, we have shown that somatic stem cells are able to differentiate to germ cells. Derivation of both male and female gametes in vitro raises the possibility of using these gametes to gain a better understanding of basic reproductive biology and, in particular, to extend the potential for therapeutic cloning, transgenic technologies and the treatment of infertility. We started three different approaches for establishment of the in vitro gametogenesis systems: 1) ES-derived gametogenesis, 2) derivation of germ cells from somatic stem cells and 3) in vitro gametogenesis based on cultured spermatogonial stem cells. We developed a strategy for the establishment of germline stem cell lines from embryonic stem cells. These cells are able to undergo meiosis, generate haploid male gametes in vitro and are functional, as shown by fertilization after intra-cytoplasmic injection into mouse oocytes. Molecular and cellular mechanisms underlying differentiation of ES to functional gametes should be elucidated in future research. In other approach, we show that bone marrow stem (BMS) cells are able to trans-differentiate into male germ cells. BMS

Answer:

The answer is 4, 46 chromosomes.

Explanation:

Human cells all have 23 pairs of chromosomes, which makes up 46 chromosomes altogether.

Answer:

option 4

Explanation:

Humans have 23 pairs of chromosomes, for a total of 46 chromosomes. In fact, each species of plants and animals has a set number of chromosomes.

Answer:

the right option here is option C

The statement which describes how the scientific name of an organism is written is—It is written as genus and species. Therefore, the correct option is B.

Scientific names are the names that are given to a species of an organism, which is based on the binomial nomenclature given by  Swedish botanist Carolus Linnaeus. These names are given by the taxonomists while naming an organism at the species level.

A scientific name comprises 2 parts: The first part is the genus name or the generic name, while the second part is the name of the species. A third part can also be added, where the name of the scientist who first discovered the species is written. Example- Homo sapiens refers to modern human beings. It is written in italics and in which the initial letter of the genus name is capitalized. Therefore, the correct option is B.

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Answer:

Permits an unlimited range of answers.

Reveals how the respondents think about the question.

Responses can be used to expand on and clarify closed responses.

Explanation:

Answer:

Advantages

It is easy to quantify and compare the results of surveys with closed questions

Disadvantages

Closed questions may not provide appropriate alternative responses.

Explanation:

Explanation:

Answer:

plants are producers.

animals are consumers

Answer:

plants are producers.they make their own food.

animals are consumers.they consume other organisms for food.

hope this helps

plz mark me brainliest.

Answer:

B

Explanation:

The formation of natural gas is a process that takes millions of years. by human standers

Answer:

amelia's experiment

Explanation:

Answer:

Photo means light

Explanation:

Answer:

F= 1

C= 2

A= 3

D= 4

E= 5

B= 6

G= 7

Explanation:

Answer:

response to stimuli

Explanation:

mark me as brainlist

Answer:

A

Explanation:

Already answered in duplicate question of yours

Components of a nucleotide are:-

A phosphate group, a deoxyribose, a nitrogen-containing base

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Answer:you could put solar panels on top of your house.

Explanation:solar panels on top of your house is something that you need at any time

Answer:

Explanation:

The alpha male and his mate and a few others go hunting for food for the pack. Other has to stay and protect the pup and the area from others packs. So it teamwork 4-5 are hunting 5 or more defend their home.

Answer:

The benefits of using pesticides are that they try to minimize the amount of infestations by pests and thus  protecting the crops from potential yield losses and reduction of product quality.

The drawbacks of using pesticides are that there is  evidence of both direct and indirect dangers involved in the use of these chemical substances both for  humans and the environment.

Answer:

1.) The Amphibian life cycle isn't as simple as it seems. The main Amphibian that has a longer process are called Frogs. Everyone knows frogs, but they are different from most animals such as turtles. The first stage of frogs are when their in eggs of course. These eggs are called "Tadpoles" and look different than most eggs. These eggs are kept in water until they grow. Which brings me to the next stage. When the tadpoles hatch you would start to see something like a baby fish swimming around. That's still the same tadpoles you saw before just hatched. When it comes to this topic most are confused because frogs don't have tails. Well during these stages a tail is used to help them survive in the water and move around. The third stage of these interesting creatures are when they grow legs. That's when they are able to walk on land. They still have their tail of course. It still helps them swim in water. I don't understand much about why they still have a tail if they've grown legs,  but that's for me to find out soon. Eventually they grow more and more and get better with their legs and lose the tail. Well the tail doesn't just magically disappear. It's actually absorbed  by using something called apoptosis. Then it's pretty much and adult frog.

2.) Most baby reptiles are grown in eggs. Another name for them would be "Amphibians". These little creatures are mostly kept in water or hidden underground for various reasons. Unlike turtles and lizards. Frog eggs are called "Tadpoles". They look like mini clear eyes. They also have a longer process than most animals which was explained in the first question!.

Explanation:

Hope this helped!

Answer:

2.) vertebrates have endoskeletons. some examples are...fish, birds, mammals, amphibians, and reptiles

Answer:

rain

Explanation:

my reasoning for this is because rain is just water and for mud you need water so if it flows it needs lots of water or rain but thats my reasoning might be wrong

Answer:

heavy rain or sudden thaw

Explanation:

Answer:

The other members o the groups help them to survive by taking care of the pups.If it want for them maybe they would die.So the social or connection they have with them will help them to connect with them when they grow

Answer:

lines

drawn

pole

west

prime

equator

north

Explanation:

Answer:

Rats and Humans both live on land during all life stages.

Explanation:

I think this because rats don't live in water or anything like that during their lifetimes. Humans also don't live in water during their lifetimes. So that is how I know that they share living on land during all life stages characteristic.

Answer:

virology and microbiology