pathogen
Explanation:
pathogen is a bacterium, virus, or other microorganism that can cause disease.
Answer/Explanation:
a. When pesticides is sprayed on the leaf, the population of non-resistant insects reduce drastically as many would not be able to survive or reproduce.
b. Resistant insects that are few initially would be able to survive the spray of pesticides. Overtime, these few resistant insects reproduce more offsprings that carry the resistant genes to these pesticides. As a result, the population of resistant insects become increased more than the non resistant insects.
The correct answer is that the H zone becomes narrower.
The H-band refers to the region of the thick filaments, which is not overlaid by the actin (thin filaments). Within the H-zone is a thin M-line, which is formed of cross-connecting components of the cytoskeleton.
At the time of muscle contraction, the A-bands do not vary in their length, whereas the H-zone and the I-bands shorten. This makes the Z-lines come near to each other.
Epinephrine... The adrenal medulla develops from neural tissue and secretes two hormones,epinephrine and norepinephrine<span>.</span> These two hormones are secreted in response to stimulation by sympathetic nerve, particularly during stressful situations.
Answer:
0.995
Explanation:
Given,
The selection coefficient as 0.005
The question pinpoints recessive homozygotes were selected against, the relative fitness
Fitness is in relation to the level of relative survival
The recessive homozygote being selected against, we use W = 1 - s
The formulae of interest
when recessive homozygotes were selected against, the relative fitness
W = 1 - s
= 1- 0.005
= 0.995 (3 decimal places).
