Answer:
mechanically gated channels; sensory receptors
Explanation:
Answer/Explanation:
We are not told if the plant has 20 chromosomes in total or 20 pairs of chromosomes. E.g. a human has 23 chromosomes, but we are diploid, so there are 46 chromosomes present in most cells.
An exception to the rule is the gametes, or the sex cells, where we are haploid. We have 23 chromosomes in these cells.
Pollen cells in plants are the sex cells. Therefore, they are haploid. If we assume that 20 chromosomes is the haploid number (and there are therefore 20 pairs of chromosomes) then the pollen will have 20 chromosomes.
If we assume that 20 chromosomes is the diploid number (and therefore there are 10 pairs of chromosomes), then the pollen will have 10 chromosomes.
B. Harmful to humans if used improperly, is the correct answer.
A, C, and D are all positive effects of technology. However, we are looking for the negative effects of technology. Thus, B is the correct answer.
B. nucleus which is the brain of a cell
