To enhance heat loss, humans sweat; this is an adaptation known as
A) insulation.
B) evaporative cooling.
C) irradiation.
D) conduction.
Answer: B
You might also like to view...
The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is
A) 7. B) 10. C) 16. D) 19. E) 24.
The birth control pill is a mixture of ________ that prevent the maturation of the oocyte
a. progesterone and estrogen b. estrogen and luteinizing hormone c. estrogen and follicular stimulating hormone d. progesterone and testosterone e. testosterone and growth hormone
At a biological level, ?A?S heterozygotes suffer fewer cases of malaria than ?A?A homozygotes, and when they do get malaria, their disease is less severe. What is the biological explanation for the heterozygous advantage?
A) The ?A?A homozygotes have a shortened average life span of their red blood cells, and the shorter RBC life spans interrupt the developmental cycle of Plasmodium larvae by causing the parasites to mature and reproduce rapidly. B) The ?A?S heterozygotes have a shortened average life span of their red blood cells, and the shorter RBC life spans interrupt the developmental cycle of Plasmodium larvae by preventing many of the immature parasites from reaching maturity. C) The sickle-cell shape of the RBCs in ?A?S heterozygotes causes the Plasmodium larvae to become stuck in the RBC aggregates, which prevents reproduction. D) The anemia associated with SCD makes the ?A?S heterozygotes less attractive to mosquitoes, so they experience fewer mosquito bites and less opportunity for infection by Plasmodium larvae. E) The ?A?S heterozygotes are bitten by mosquitoes less frequently, and when they are infected, the sickle-cell shape of the RBCs in ?A?S heterozygotes causes the Plasmodium larvae to become stuck in the RBC aggregates, which prevents reproduction.
Keystone species:a
are always symbionts. b. are typically not the most abundant species in the community. c. illustrate secondary succession. d. always form the base of a food chain. e. are only found in tropical communities