The answer is (b.) fertilization
The fertilization is the stage where the egg cell or the
so-called ovum fused with the sperm cell which eventually leads the development
of the embryo or the zygote. The Embryogenesis starts when the zygote undergoes
mitotic divisions or also known cleavage process.
cologenese- h<span>ydrolyzes the polysaccharide that holds certain cells together which leads to tissue blackening</span>
Answer:
I believe the answer is A...I'm not completely sure but I tried my best to think.
Answer:
The nuclear membrane dissolves, and spindle fibers form.
Explanation:
This occurs during prophase. the chromosomes become shorter and thicker. The centrioles migrate to the opposite poles. The nuclear envelope is broken down, the nucleolus disappears, and microtubules attach to the chromosomes at the kinetochores present in the centromere. Microtubules that are associated with the alignment and separation of chromosomes are referred to as spindle fibers. Chromosomes visible under a microscope are connected at the centromere. In meiosis, the homologous chromosomes break in their DNA strands at the same point, following a recombination of the fragmented parental DNA strands into non-parental combinations, known as crossing over.
Answer:
Is the Atmosphere always the same? Explain. No, it is Constantly changing w/ Gases Moving in and out of Living things, the Land and Water. ... They are Created when the Downward Force of Air is Greater than the Upward Force of Moving Air and Air Molecules.