Members of the class ______ have two stomachs, one of which can reach outside of its body to secrete digestive juices onto its prey to liquify it.
a. Asteroidea
b. Ophiuroidea
c. Holothuroidea
d. Crinoidea
a. Asteroidea
Members of the class Asteroidea have two stomachs, one of which can reach outside of its body to secrete digestive juices onto its prey to liquify it.
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Which of the following is the site of photosynthesis in cyanobacteria?
A) peroxisomes B) mitochondria C) photosynthetic membranes D) outer walls E) thylakoid lumens
Tawny owls (Strix aluco) pair-bond for life, with both members of a pair living and hunting in adjacent, well-defined
territories. Their reproduction is regulated in accordance with the resources, especially the food supply, present in their territories. Tawny owls can best described as: a. r strategists. b. K strategists. c. fecundists. d. life historists. e. scramblers.
The HBV genome is a circular dsDNA molecule that consists of ________.
A. one complete but nicked strand B. one complete but nicked strand and a complementary strand C. a complementary strand D. segmented DNA
Which of the following does not contribute to shifts in our normal microbiota?
A) our general environment B) hormonal changes C) diet D) age E) proper hand-washing technique