In order for homeostasis to be maintained a(n) ________ must detect a specific stimulus
a. affector
b. sensory receptor
c. gland
d. sensory affector
e. effector
b
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Why does the burning of fossil fuels cause an imbalance within the carbon cycle? What is the consequence of this imbalance? Include a diagram of the carbon cycle to illustrate your answer
What will be an ideal response?
Molecular clocks are usually calibrated based on
A. guesses about the rates of mutations in a particular gene. B. observed rates of mutation in a particular gene. C. the first shared common ancestor for species known from the fossil record. D. comparing the gene to similar genes in other kingdoms. E. the date when two species diverged from a common ancestor.
FSH and LH are secreted by the
a. hypothalamus. b. ovaries. c. anterior pituitary. d. testes. e. uterus.
What cellular structure is unique to plant cells and some photosynthetic fungi?
a. nucleus b. vacuoles c. chloroplasts d. mitochondria e. endoplasmic reticulum