4. Which of the following infectious diseases are a challenge to form a vaccine for due to their constant mutations? (Choose all that apply)

influenza

U measles

LHIV

polio

the answer is a or when it says crossing over

it's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus

when it is at an intermediate population density