Answer:
b and d btw are you taking an exam? Or test?
Explanation:
The OLFACTORY AND THE GUSTATORY SYSTEMS have receptors which die out after sometimes because of direct exposure to the environment.
The olfactory system has to do with the perception of smell while the gustatory system has to do with taste stimuli. For these two basic sense organs, their perception rate is always highest when they are newly exposed to a stimuli, after continuous exposure to the stimuli their receptors die out.
If the choices are:
<span>A. they are all nonrenewable energy sources
</span>
<span>B. they all require an indirect use of sunlight in order to make electricity
</span>
<span>C. they are all considered alternative energy sources
</span>
<span>D. they all require turbines to spin in order to create electricity
</span>
then ans is C
Answer:
The inheritance pattern is of sex-linked
Explanation:
Sex-linked traits are traits that are controlled by genes which are located on the sex chromosomes. Superscripts of the X or Y chromosome are written as the alleles for sex-linked traits chromosome.
In this case, since all of the male offspring have long tail fins, and none of the females possess the trait. Mating two of the F1 fish fails to produce females with the trait. The sex-linked gene that is on the Y chromosome and is possessed only by males is the type of inheritance pattern that occurs here because after mating the two F1 fish no female produced possess the trait.
Semen is alkaline because it contains basic amines like spermine, putrescine and cadaverine. It is as such because it counteracts the acidic environment of the vaginal canal to protect the sperm from denaturation. Fructose level is important because it provides energy to the sperm.