Organisms from all classifications of life are composed of cells
A. true
B. false
Answer: A
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The reason that this insect can ‘skate’ across the water in a pond is _____
1.its legs make covalent bonds with the water
2.cohesion of the water molecules keeps it from sinking
3.the pH of the water is lower than the pH of the insect’s legs
4.salt in the pond buffers the water so the insect does not sink
Binding of a protein hormone may lead to formation of a(n) __________, which relays a signal into the cell. Fill in the blank(s) with the appropriate word(s)
Pioneer plant species are usually characterized by ____
a. small size b. high dispersal rates c. slow maturation d. high dispersal rates and high numbers of offspring e. small size, efficient dispersal mechanisms, and slow maturation
Which of the following polymers of glucose is used as a vehicle to store energy reserves in animal cells?
(a) glucagon (b) glycogen (c) starch (d) glycerol