Answer:
True
Explanation:
Edg
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.
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.
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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B) A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny.
C) A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one.
D) A monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two generations.
E) A monohybrid cross results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1 ratio.
B) A cat with glowing purple eyes, a trait never seen before.
C) A rare copper snake giving birth to 10 copper colored snakes.
D) A cow with 4 ears giving birth to 3 calves with normal 2 ears.
E) A growth that looks like a 6th finger on a monkey.
Answer:
E.
his genes are mutating
The correct options for the question are as follows:
weaken viral respiration.
destroy viral mitochondria.
reduce the ability of the virus to absorb cells.
prevent the virus from entering cells.
Answer:
The correct answer is - prevent viruses from entering the cell.
Explanation:
Answer:
Within 10 to 24 months
Explanation:
In infants, you may observe soft spots in the head and these are called fontanelles. They are located in different specific areas and they close at varied times.
The posterior fontanelle is the first to close, usually around 2 to 3 months after the infant's birth. The second would be the sphenoidal fontanelle, closing at 6 months. The third would be the mastoid fontanelle, which closes within 6 to 18 months. Lastly, the anterior fontanelle, which closes around 10 to 24 months after birth.