Answer:
<em>The correct option is A) The chemicals in the pesticides could run off into water sources and contaminate them, which would kill many aquatic species.</em>
Explanation:
Although pesticides can be helpful in eliminating the pests which thrive on crop plants, yet the usage of pesticides can be harmful in a number of ways. Increase in the usage of pesticides can be harmful for humans when they utilize food from such crops which is loaded with pesticides. Also, increased usage of pesticides causes the pesticides to run off in nearby rivers and lakes due to conditions such as a flood. The toxic pesticides kills the aquatic life present in that lake or river.
I think the answer is "ARE NOT"
Answer:
The bacterial fission occurs by the following method:
The DNA replicates. The replicated DNA is copied and it moves to the opposite sides of the cell. The length of the parent cell increases. The cell divides from the center with distribution of equal amount of DNA. After this, the cell wall is formed.
In protist fission: In protist fission, the nucleus of the parent cell divides many times. After this cytoplasm separates and forms around the daughter nuclei.
Answer:
B. Stabilizing selection.
Explanation:
In a population, natural selection can favor one of the many phenotypes present. Directional selection is the phenomena where one of the extreme phenotypes is favored. Disruptive selection is the phenomena where both the extreme phenotypes are favored over the average phenotype. In stabilizing selection, the extreme phenotypes are not preferred so that maximum organisms fall under the average category.
Here, low spine number cacti are being eaten by peccaries and high spine number cacti are being eaten by a parasite. Both of these extreme phenotypes are under attack which will favor the cacti with average number of spines to survive. Hence, this is an example of stabilizing selection.
