Molecules that are able to store and reproduce genetic information are known generally as ____
a. molecular hard drives
b. molecular replicators
c. DNA
d. RNA
e. ribozymes
ANSWER: b
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The loop of Henle dips into the renal cortex. This is an important feature of osmoregulation in terrestrial vertebrates because _____
A) absorptive processes taking place in the loop of Henle are hormonally regulated B) differential permeabilities of ascending and descending limbs of the loop of Henle are important in establishing an osmotic gradient C) the loop of Henle plays an important role in detoxification D) additional filtration takes place along the loop of Henle
The first line of plant defense against pathogen infection is(are) the:
A. cuticle. B. plasmodesmata. C. stomata. D. pathogens. E. cell walls.
Water is important to the interactions of biological molecules because it ____
a. is a good buffer b. destabilizes temperature c. is a poor solvent for polar and ionic substances d. has weak cohesive properties e. promotes hydrophobic and hydrophilic interactions
Which of the following is present in all chordates?
A) A notochord B) An external skeleton C) A vertebral column D) Chloroplasts E) Four limbs