Answer:
Differential reproduction leads to a change in allele frequencies over time. This occurs because of natural selection favoring "successful" individuals that produce more viable offspring.
The sickle-cell allele is maintained in populations exposed to malaria through balancing selection, since heterozygous individuals have protection against the disease.
Answer:C
Explanation:The role a species plays in the ecosystem is called its niche. A habitat is the physical environment in which a species lives.
These structures have the function to move around.
Option: C
Explanation:
Tortoise is one animal who used to hide its body under a protective shell. To move its body parts take sharp bend and move around. It belongs to reptile family. It has four legs. Turtle's leg only appeared when it move on the land surface. It takes much time to move. Whole body remain under the shed of hard shell.
Turtles easily move into the water. They are good swimmer. They faced difficulties in moving on the ground mainly on undulating surface. They move very awkwardly. Their body weight is very heavy that is one of the problem in crawling.
Mitochondria are organelles found in the cytoplasm of the cell that release energy from glucose in the process of respiration. Chloroplasts are organelles that contain chlorophyll, a light-trapping pigment, needed from photosynthesis.
By examining the uses of these organelles and using prior knowledge that photosynthesis requires energy, it can be determined that the relationship between mitochondria and chloroplasts is:
Mitochondria -- Energy Released -- Photosynthesis Occurs -- Glucose Produced
