Steroids are among the lipids with no _____
a. double bonds c. hydrogens
b. fatty acid tails d. carbons
B
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The organ system that is responsible for the physical and chemical breakdown of food and for the absorption, processing, and release of digestive products.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
The origin of replication in bacteria is called OriC
Indicate whether the statement is true or false
The nematode Caenorhabditis elegans is important to human medicine because:
A. It causes elephantiasis, a disease of the lymph glands that causes the legs of humans to swell. B. It is an intestinal parasite in human digestive tracts. C. It has programmed cell death and therefore is useful in cancer and AIDS research. D. It causes an infection that produces severe anal itching. E. It is transmitted by mosquitoes and causes high fevers.
Attribute one of these statements to the blastopore.
A. it occurs in both protostomes and deuterostomes. B. it is the opening from the coelom to the outside of the animal. C. it is the opening from the archenteron to the coelom. D. it can develop into the brain in some animals. E. it can develop into the gut in some animals.