21)

a. crossing over results in the exchange of genetic material of homologous chromosomes.
b. fertilization produces offspring with varied genetic combinations.
c, chromosomes are randomly assorted into gametes.
d. at the completion of meiosis, all four gametes differ.
e. no two offspring can ever be identical.
meiosis produces gametes during sexual reproduction. as seen here, meiosis results in four haploid gametes. review the process as well as the results of meiosis, paying particular attention to the green circled area. what statements, in the prompt, accurately describes what is modeled here?
a) a - e
b) a - d
c) a - c
d) a and b

the scientific method.

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

i got you i did it ya know what it is just needing to fill this in for a quick task!