Which of the following are derived from mesoderm?  

_____  blood
_____  epidermis of skin
_____  heart
_____  kidney
_____  lining of the digestive tract
_____  lining of the respiratory tract
_____  muscles
_____  nervous system
_____  skeleton
_____  somites


__X__  blood
_____  epidermis of skin
__X__  heart
__X__  kidney
_____  lining of the digestive tract
_____  lining of the respiratory tract
__X__  muscles
_____  nervous system
__X__  skeleton
__X__  somites

Biology & Microbiology

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True or false: The benefit of asymmetric meiotic division during oogenesis is that it allows most of the cytoplasm to be retained in a single cell

A. true B. false

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Which blood vessel is next to living cells in nearly all body tissues?

a. venules b. arterioles c. capillaries d. veins e. arteries

Biology & Microbiology

According to the accompanying figure, global warming would result from an increase in which of the labeled components?


a. 1 and 2
b. 2
c. 2 and 3
d. 3
e. 4

Biology & Microbiology

Which of these would a paleontologist most likely do to determine if a fossil represents a reptile or a mammal?

A) Look for the presence of milk-producing glands. B) Look for the mammalian characteristics of a four-chambered heart and a diaphragm. C) Use molecular analysis to look for the protein keratin. D) Examine the teeth.

Biology & Microbiology