Answer:
True
Explanation:
A paired homologous chromosomes are called bivalents or tetrads (as one pair has four chromatids). During anaphase I, the homologous chromosomes of a bivalent separate from each other. These homologous chromosomes move to the opposite pole of the cell. Anaphasic movement of homologous chromosomes is assisted by spindle fibers. The shortening of spindle fibers pulls the homologous chromosomes to the o[opposite poles.
The more isolated an island is, the lower its species richness will be. An island's size also affects its biodiversity, since larger islands will have a wider variety of habitats, so species that arrive on the island will diversify to fill up the available niches.
The correct answer is option B (Microevolution)
Microevolution is defined as a change is allele frequencies observed within a population. In contrast to macroevolution it can be observed within a short period of time even within a same generation.
Microevolution can occur due to following reasons:
- Gene flow or Gene migration
- Genetic drift
- Mutation
Answer: repeated
Explanation: Redundancy in the genetic code means that most amino acids are specified by more than one mRNA codon.
