Which component of a negative feedback mechanism is responsible for producing the effect that
counteracts the original environmental change away from homeostasis?
a. sensor
b. response
c. effector
d. stimulus
e. integrator
C
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As part of aerobic respiration, O2 is reduced and loses electrons, and glucose (C6H12O6) is oxidized and gains electrons
A. true B. false
Direct repeats can cause mutation when
A) a person encounters a mutagen. B) homologs misalign during meiosis such that the first copy of the gene on one chromosome lies opposite the second copy on the homolog. C) introns are not removed promptly and their sequences are included in the gene product. D) they bond within the same DNA strand, forming loops that disrupt replication enzymes.
The water and minerals absorbed by the roots usually first enter the:
a. pericycle b. vascular tissue c. cortex d. epidermis e. endodermis
In fetal circulation, most blood is shunted away from the lungs. Why is this the case?
A) The lungs don't need any blood. B) The fetus receives oxygen at the placenta, and the lungs are not yet fully functional. C) The lungs do not form until right before birth. D) The lungs have their own circulation.