The organ system that protects the underlying tissues from abrasion, prevents dehydration, and aids in regulating body temperature.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
E) Integumentary
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Which of the following are the water conducting cells of the xylem?
A. tracheids and parenchyma B. vessels and parenchyma C. sieve tubes and tracheids D. vessels and tracheids E. parenchyma and sieve tubes
Replacement-level fertility requires a total fertility
rate of a. 2.0 b. 2.1 c. 2.4 d. 2.6 e. 2.8
Two Martians fall in love and marry. One Martian is homozygous for red eyes and the other is heterozygous. The recessive eye color is purple. What is the probability that they will have a child with purple eyes?
a. 1/1 b. 1/2 c. 1/4 d. 3/4 e. 0
Which of the following explains why fewer animals live in freshwater than in the ocean?
a. Freshwater is turbulent. b. Freshwater generally contains less food.
c. Freshwater maintains a constant oxygen content. d. Freshwater is generally hypotonic to tissue fluids. e. Freshwater temperatures do not fluctuate much.