Which of these biomes are maintained by fire?
A) temperate broadleaf forests and chaparral
B) chaparral and savannas
C) deserts and chaparral
D) savanna and temperate grasslands
B
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Suppose you traveled back in time and located the first animals to have evolved feathers
You found that these animals were tree-dwelling ectotherms, able to run quickly but unable to fly. You also noticed that only males had feathers. Which hypothesis of feather evolution would these data most support? Feathers initially evolved in a role associated with _____. A) flight B) insulation C) sexual selection D) gliding
Why would an iron deficiency result in anemia?
What will be an ideal response?
F1 offspring of the cross AA x aa are _____
a. all AA b. all aa c. all Aa d. 1/2 AA and 1/2 aa
The control over milk "let down," labor in childbirth, and water balance are mediated by the ____
gland. a. pineal b. anterior pituitary c. posterior pituitary d. parathyroid e. thyroid