#Question id: 1989
#Unit 4. Cell Communication and Cell Signaling
Which of the following are T cells of the immune system?
#Question id: 7536
#General Aptitude
#Question id: 1495
#Unit 4. Cell Communication and Cell Signaling
In some breast cancers, estrogen acts as a(n):
#Question id: 3424
#Unit 11. Evolution and Behavior
Which of the following statement is correct?
A. Darwin, theory of natural selection based on better-adapted organisms would acquire more resources and leave more offspring.
B. When population sizes become too small, individuals accumulate deleterious (harmful) mutations, and survival of offspring is threatened
C. Inbreeding is more likely to take place in nature when population size becomes very small and the number of mates is limited.
D. Effective population size can be reduced by harem mating structures
E. The movement of a few individuals between populations can counteract the effects of genetic drift
#Question id: 1924
#Unit 4. Cell Communication and Cell Signaling
Antigens normally expressed only on embryonic cells but also sometimes found on tumors are known as: