Which of the following explains why arteries have thicker walls than veins?
a. because arteries carry oxygenated blood
b. because veins carry deoxygenated blood
c. because arteries carry high pressure blood from the heart
d. because veins also carry blood from the lungs into the heart

The procces of farming organism from the sea is ?

6. in domesticated cats, the following are independently assorting: normal ears (t) is dominant to tufted ears (t); curved whiskers (c) is dominant to straight whiskers (c); the presence of six toes (s) is dominant to five toes (s); gene for hair length is an x-linked codominant. the three phenotypes for hair length are long (xhxh), medium (xhxh), and short (xhxh); medium is the heterozygous condition. given two parents: ttccssxhxh x ttccssxhy how many different gametes could be formed in the female cat with respect to these four traits? how many phenotypes are possible in the offspring from this mating?

2. which is the last step in the scientific method?