Choose all the answers that apply.

A human .

sperm cell has 23 chromosome pairs
skin cell has 23 chromosome pairs
egg cell has 46 chromosomes
bone cell has 46 chromosomes
gamete has half the chromosomes of a red blood cell

Adistinctive characteristic of mammals that is not observed in other vertebrates is

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

In two sentences explain the differences of neutrophil and macrophage