Answer:
Option 3, Chromatids remain attached to one another until anaphase
Explanation:
Centromere lies at the center, end or other points of the chromosome and joins the two sister chromatids. During cell division, the spindle fibers attaches at the centromere and detaches the chromosomes during the anaphase of the cell division to ensure that each daughter cell gets equal number of chromosomes at the end of mitosis. Centromere plays an essential role in the separation of chromosomes.
Hence, option 3 is correct
Answer:
A. Puffins receive energy from herring, herring receive energy from krill, and krill receive energy from phytoplankton.
Explanation:
A food chain represents the unidirectional network or path of the flow of energy and the matter in an ecosystem.
The aquatic food chain begins from the small or microscopic organisms called phytoplankton which is autotrophic therefore are considered the producers.
The phytoplanktons are eaten by a variety of other organisms in which the krills which live in the deep sea feeds on these phytoplanktons. The krills are the primary consumers who are eaten by small fish like herring which acts as secondary consumers. These herring are then eaten by the bird-like puffins and large fish which acts as tertiary consumers.
Thus, Option-A is the correct answer.
The name is : DNA Replication
Answer:
If there is a mutation in the p53 protein then this leads to abnormal cell growth and cell death or apoptosis does not occur.
Explanation:
p53 is a tumor supressor protein.p53 is encoded by TP53 gene.The protein is named so because the protein has a molecular weight of 53 kilo Dalton and this protein helps in programmed cell death or apoptosis.
The mutation in p53 result in the abnormal cell growth due to accumulation of mutated p53 protein, an important sign of development of cancer.