The California populations of the Northern elephant seal are descendants from a very small population of seals that was overhunted in the 1890s. Heterozygosity in this population would be expected to be ________ due to ________.
A. great; a bottleneck effect
B. slight; a bottleneck effect
C. great; assortive mating
D. slight; the founder effect
E. great; disruptive selection
Answer: B
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Which of the following statements concerning the properties of ligands for intracellular receptor systems is correct?
A) Steroids are produced from cholesterol. B) Changes in the composition of your diet can affect the concentration of some of these ligands in your body. C) Some ligands are bound to specific proteins when carried in the blood. D) both choices A and C E) choices A, B, and C
Sponges (phylum: Porifera) are animals that possess feeding cells called collar cells. These cells have a central flagellum surrounded by a collar of microvilli. The collar filters organic matter out of the water column. Which protist shares a more recent common ancestor with the poriferans?
A. Ciliates B. Rhodophyta C. Choanoflagellates D. Radiolarians E. Myxomycota Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about Porifera? How does it relate to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Memories are associated with which brain regions?
a. parietal lobe of the cortex b. frontal lobe of the cortex c. parietal-temporal-occipital association cortex d. limbic association cortex e. prefrontal association cortex
Which brain structure is associated with muscle atonia?
-the pons -the cerebellum -the amygdala -all of the above (as all are part of the hindbrain)