Hemoglobin is a respiratory protein. Its function is to
A) increase the oxygen-carrying capacity of blood.
B) provide structural integrity to red blood cells.
C) remove toxins from plasma.
D) attract lymphocytes to damaged tissues.
E) assist in blood clotting.
A
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In Gibson’s experiment with small mammal populations in the tropical forest, ____
a. most species disappeared from small islands within the first 5-7 years after fragmentation b. all species disappeared from small islands within the first 5-7 years after fragmentation c. populations increased 25 years after fragmentation d. most species disappeared from small islands, but quickly recolonized after 5-7 years e. fragmentation had no affect on small mammal species
Cells of multicelled eukaryotes have receptors
that can recognize around ___ PAMPs.
a. 10 b. 100 c. 1000 d. 10,000 e. 100,000
Hospital data shows that human infants born with an intermediate birth weight have a better chance of survival than those that weigh much less or much more. Larger than normal babies may have a difficult delivery, while smaller than normal babies may not be fully developed. What type of selection is occurring? Is the variability in birth weight in human populations increasing or decreasing?
What will be an ideal response?
Desert plants often have ________ in their seed coats that keep them dormant until there is enough rain to complete their life cycle
A) digestive enzymes B) cold-sensitive compounds C) drying agents D) water-soluble chemicals E) wetting agents