What happens when the diameter of an artery decreases?
A) The blood pressure increases.
B) The blood pressure decreases.
C) The heart rate decreases.
D) Its epithelial cells stretch.
E) Its semilunar valves open.
Answer: A
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________ was the first to describe microorganisms, while ________ was the first person to see bacteria
A) Antoni van Leeuwenhoek / Robert Hook B) Antoni van Leeuwenhoek / Robert Koch C) Robert Hooke / Antoni van Leeuwenhoek D) Robert Koch / Antoni van Leeuwenhoek
Which archaeal phylum contains primarily extreme halophiles and methanogens?
A) Crenarchaeota B) Euryarchaeota C) Nanoarchaeota D) Thaumarchaeota
An animal whose body temperature tends to fluctuate with the external environment is an
A. thermophile. B. mesophile. C. amniote. D. endotherm. E. ectotherm.
The chemical components of ribosomes are proteins and ________.
What will be an ideal response?