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
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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
Which blood vessel is next to living cells in nearly all body tissues?
a. venules b. arterioles c. capillaries d. veins e. arteries
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
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.