Which of the above diagrams represents a junction
which will allow ions to move between adjacent
cells?
a. A
b. B
c. C
d. all of these
e. none of these
Answer: c
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The function of vertebrae is to
A. protect the brain. B. protect the nerve chord. C. protect the nerve cord and provide attachment points for muscles. D. provide attachment points for muscles. E. protect the brain and nerve cord.
Matching. Choose the one most appropriate answer
for each. 1. ___ conservation biology 2. ___ coral reef 3. ___ ecoregion 4. ___ endangered species 5. ___ habitat fragmentation 6. ___ habitat island 7. ___ habitat loss 8. ___ hot spot 9. ___ indicator species 10. ___ strip logging 11. ___ riparian zone A. a reduction in suitable places to live B. organisms that give an “early warning” signal of changes in biodiversity C. new method of harvesting trees to preserve diversity D. a field of research whose goal is conservation of biodiversity E. species vulnerable to extinction F. broad land or ocean region defined by climate, geography, and producers G. ocean structure of amazing biological complexity H. locations where species are in greatest danger of extinction I. a national park is an example J. narrow corridor of vegetation along a stream or river K. isolated patches of habitat; this describes an island such as Oahu
A polysaccharide that is composed of modified glucose subunits and that is found in the exoskeletons of insects and crustaceans is known as:
A. glycogen B. starch C. amylose D. chitin
The founder effect is an example of genetic drift in which rare alleles occur at a higher frequency in a population isolated from the general population.
Answer the following statement true (T) or false (F)