What is the name for the protective structure that forms around the embryo

Answers

Answer 1
Answer: Amniotic cavity is the term used for the sac which protectsan embryo from internal and external pressures. It contains the amniotic fluid whichserves as the cushion for guarding the developing embryo and the system towhich it is being fed on. It is a crucial part of pregnancy to be able to taketests in diagnosing the fetus for possible defects and abnormalities and one ofthe methods used is the amniocentesis wherein samples of the amniotic fluid aresampled.

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"Over the years, the forest cover in a particular ecosystem was reduced from about 50% to 20%. What would be the MOST LIKELY effect of this?A) The loss of moisture from the soil would be reduced.
Eliminate
B) Herbivores would be forced to change into carnivores.
C) The flow of energy in the ecosystem would be affected.
D) The exchange of carbon dioxide in the ecosystem would increase"

Answers

The correct answer is option C

If the forest cover in an ecosystem is reduced from 50% to 20%. The most likely effect is that the flow of energy in the ecosystem would be affected.The forest means the green plants that are also known as the producers of the ecosystem and they transfer energy to the consumers and the ecological balance is maintained. If there will be less producers then the flow of energy in the ecosystem will be affected.

Answer:

c

Explanation:

c

How would retaining extra cytoplasm enhance survival of a developing oocyte?

Answers

Answer:  An extra cytoplasm enhance survival of a developing oocyte in such a way because cytoplasm serves as a reservoir of lipids, polysaccharide and lipids for the developing embryo.The more the cytoplasm content, more will be the nutrients for the developing embryo. The cytoplasm forms the yolk and provides nourishment to the developing embryo. As we know that the developing embryo requires more nutrition and the main source of nutrition is cytoplasm because the sperm has no reservoir of its own to provide nutrition to embryo.

Thus, an extra cytoplasm enhance the rate of survival of a developing oocyte.




Final answer:

Extra cytoplasm in a developing oocyte supports survival by providing necessary nutrients from fertilization to implantation, and energy for cell divisions transforming a zygote into an embryo. It also contains the mechanism preventing polyspermy, thereby ensuring successful fertilization and further development.

Explanation:

Retaining extra cytoplasm in a developing oocyte boosts its survival chances by supplying the zygote, formed post-fertilization, with essential nutrients needed during the period up to implantation into the uterus. This is crucial as the sperm solely contributes DNA and not cytoplasm at fertilization. Accordingly, the cytoplasm and all of the cytoplasmic organelles in the developing embryo, including mitochondria, are maternally sourced. Mitochondrial DNA is maternally inherited and critical for tracing biological lineage.

Upon fertilization, the larger amount of cytoplasm also provides energy and raw materials for the rapid cell divisions that take place in the zygote during its journey to the uterus. This process transforms the zygote from a single cell into a tightly packed sphere of cells referred to as a morula which consequently evolves into a blastocyst. The blastocyst implants in the uterine wall and further develops into an embryo.

Furthermore, the oocyte's cytoplasm possesses a mechanism to prevent polyspermy, the penetration of more than one sperm. Polyspermy leads to a triploid organism with three sets of chromosomes which is incompatible with life. Therefore, the cytoplasm plays a crucial role in ensuring successful fertilization and development of the embryo, making enhancing cytoplasmic retention essential for the survival of the developing oocyte.

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Classify each of the following as an atom, a compound, or a molecule:the smallest possible “piece” of gold (Au)
the smallest possible “piece” of quartz (SiO2)
water (H2O)
what a molecule of CO2 is made of
hydrogen gas (H2)

Answers

Gold is an atom, quartz is a compound, water is a molecule, CO2 is a molecule, H2 is a molecule.

While studying enzyme kinetics in the lab, a scientist observed that the rate of a reaction involvingenzyme amylase increased as the concentration of starch increased. With further increase in starchconcentration, the amylase activity did not change. Why did this happen

Answers

  B. This is because there were still active sites available for the starch substrate to bind to when the concentration was initially increased (the reaction will have been first order with respect to the concentration of starch). However, at a certain concentration, all the active sites of the enzymes will be full so there will be no active sites available for the starch molecules to bind to (the reaction is now zero order with respect to the concentration of starch). i need brainliest answer to rank up plzzzz help

What happens if both sister chromatids move to the same pole

Answers

Although many cells go through both anaphase A and B motions, occasionally one motion takes precedence over the other. Poleward migration in anaphase requires the separation of the paired sister chromatids. The components that link the chromatids at the centromere are degraded by proteolysis, which causes chromatid separation.

What both sister chromatids move to the same pole?

Synapsis is the name given to this action. Crossing over happens during synapsis. DNA is transferred between two nonsister chromatids of a homologous pair of chromosomes during crossing over.

When nondisjunction occurs, the homologous or sister chromatids are drawn to one pole of the cell because the separation does not take place.

Therefore, One daughter cell would have more chromosomes than usual, and one sister chromatid would not split equally during the anaphase of mitosis.

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You end up with two cells with aneuploidy, or abnormal chromosome number. One daughter cell will have one extra chromosome, the other daughter cell will have one less than what it should have. For example, if the normal number is 46, and this happened, you would end up with one cell with 45 and one cell with 47.

What is an ecological system consisting of all of its biotic and abiotic factors? A) community

B) ecosystem

C) habitat

D) pure culture

Answers

An ecological system consisting of all of its biotic and abiotic factors is an B. ecosystem.

Answer:

B) Ecosystem

Explanation:

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