Answer:
Option B, Mammals and reptiles in the post-dinosaur age.
Explanation:
Adaptive radiation is mechanism through which species evolve very fast from common single ancestors. In simple words two different species are said to have evolved through adaptive radiation when they have descended from a single lineage. This is not the case with mammals and reptiles.
Generally in adaptive radiation, a species evolve when it faces new environmental challenges due to change of habitat or area. For example mammals have evolved from dinosaurs.
Hence, option B is correct
The fusion of the egg cell and Sperm cell.
Answer:
True.
Explanation:
There are four phases which occur during karyokinesis, these are -
- Prophase
- Metaphase
- Anaphase
- Telophase
Telophase is the last phase of karyokinesis. The main events that occur during telophase are-
- Uncoiling of chromosome occurs
- Chromatin is formed
- Spindle breaks down
- Nuclear membrane or nuclear envelope if reformed
Thus it is clear that the events that are mentioned in the question denote truly about the Telophase.
A punnet square is a chart to help figure out the possible genotypes of two organisms' offspring.
hope it helps!
Answer:
Favorable adaptation, which is one condition required for natural selection
Explanation:
A population have both beneficial and harmful variations present in its members. The beneficial variations impart survival advantage and makes the individuals better adapted to the surrounding. Several butterflies in the given population have dotted wings. Since presence of dotted wings keeps the predators away, it is a favorable variation that would be favored by natural selection leading to its increase in the population in subsequent generations.
