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vivado [14]
3 years ago
11

Fewer than _____ of blastocysts inserted through ivf successfully implant into the uterus and become newborns.

Biology
2 answers:
finlep [7]3 years ago
7 0

Fewer than 3 of blastocysts inserted through IVF successfully implant into the uterus and become newborns


It has been shown that  different countries use different numbers of blastocysts for the IVF, regulated by the law. It is important to keep the blastocyst number low, to decrease the number of multiple pregnancy.



trapecia [35]3 years ago
6 0

the answer is 3.

The blastocyst is a structure formed in the early development of mammals. It possesses an inner cell mass which subsequently forms the embryo. The outer layer of the blastocyst consists of cells collectively called the trophoblast. This layer surrounds the inner cell mass and a fluid-filled cavity known as the blastocoele.

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What components of the eukaryotic cell were visible in the onion root tip? Which components were not? Why do you think some comp
ruslelena [56]

Looking at the onion root tip under the microscope you can see large, rectangular cells with visible distinct cell walls surrounding it (cells have a more regular shape because of the wall). Inside the cells, you can notice darkly stained nucleus, large vacuoles at the center and sometimes small granules within the cytoplasm. Looking the onion root tip under the microscope is often the way to observe mitosis. Usually, you cannot see organelles such as mitochondria, ribosomes, rough and smooth endoplasmic reticulum, centrioles and Golgi body as they appear translucent and because are too small to be seen under the light microscope (electron microscope required). Also, chloroplasts are not present in an onion cell because it is not a photosynthetic cell.

6 0
3 years ago
About how much energy is transferred from a producer to a primary consumer?
Akimi4 [234]

Answer:

b. 10% of the plant's energy.

Explanation:

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Hope it helps! ^_^

8 0
3 years ago
Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
attashe74 [19]

Answer:

0.45 from mom and 0.05 from dad.

Explanation:

The recombinant progeny might occur due to the crossing over at the time of meiosis in which the exchange of chromosomes occur in the homologous chromosomes of non sister chromatids.

The progeny receives half of their chromosome from the mother and half from the father. The mother 50% AZ and 50% az chromosomes respectively. The 10% recombination has occured due to which the mother chromosomes is reduce upto 45%. The recombinant  10% will be aZ and Az and has 5% frequency. Mom has the ability of az chromosomes is 0.45 %. The father has the genotype 50% Az and 50% aZ. The 10% recombination has occured due to which the father chromosomes is reduce upto 45%. The recombinant will be az and AZ with 5% frequency. So, father has az with 0.05 % probability.

Thus, the answer is 0.45 from mom and 0.05 from dad.

8 0
3 years ago
What can you conclude about fossil by looking at the layers of rock?
Sergio [31]

Answer:

The fossils in the lower layers are older than the fossils in the upper layers.

Explanation:

8 0
3 years ago
What stem cells are capable of only limited differentiation
Sidana [21]
The Embryonic stem cells are capable of limited differentiation.
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3 years ago
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