<span>The answer is A.
Invasive species are species that thrive unregulated
in an introduced environment/ habitat and
affect the biodiversity of the environment.
They boom unchecked mostly due to lack of a natural predator. Therefore, introducing
a predator will limit their growth. </span>
Answer:
(A) Bioaccumulation
Explanation:
When the concentration of certain substances in the bodies of the organisms of various trophic levels keeps on increasing as they pass through the food chain, the process is called bioaccumulation or biomagnification.
Most of the organic non-biodegradable pollutants/chemicals exhibit bioaccumulation. Being insoluble in water, these chemicals are accumulated in the fat tissues of the organisms.
As the predator feeds on the prey having a non-biodegradable chemical in its tissues, the chemical enters the body of the predator.
As these chemicals pass through the food chain, there is a gradual increase in their concentration stored in the living tissues of the organisms. Therefore, the top consumers exhibit maximum bioaccumulation of contaminants in a food chain.
Answer:
After the flood the total number of beetles = number of beetles per hectare × 115 hectares = 8,855 beetles.
The carrying capacity is 14,600 beetles.
Explanation:
Answer: The correct answer is- bone structure of the baleen whale and the hummingbird share common ancestor.
Bone structure of the baleen whale and the hummingbird are the homologous organs.
Homologous organs can be described as the organs of different animals, which possess same basic structure but perform different functions.
For example- The flippers of a whale and forelimb of man, bone structure of the baleen whale and the hummingbird.
Baleen Whales and hummingbirds have a basic tetrapod skeletons, which is inherited from a common ancestor. But their bodies have been modified and they have lost parts through natural selection. This results in different adaptation in the form of their respective lifestyles over many years.
Answer:
B. The hurricane has caused a population bottleneck
Explanation:
When there is a sudden reduction in the size of a population due to some unfavorable environmental conditions, the population is said to have experienced bottleneck. Bottleneck mostly results in genetic drift and changes the allele frequencies in the population. It is caused by some natural disasters or adverse conditions such as a hurricane.
In the given example, the hurricane removed all the birds with green feathers from the population and also has reduced the population size from 1000 to 10. Therefore, it represents the population bottleneck.
