A life table
a. is used extensively by the insurance industry.
b. can be used to determine the exact year of death for an individual.
c. for humans does not take into account deaths from accidents.
d. has no predictive value.
e. determines the maximum age a human can reach.
A
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Recall the caterpillar experiment in which caterpillars born in the spring looked like flowers, and caterpillars born in the summer looked like twigs. What is the most likely selective advantage for this difference in body shape?
A) Looking like their food sources allows the caterpillars to move through their environment more efficiently. B) Development into the adult moth form is faster for caterpillars shaped like twigs than like flowers. C) Looking like their food source lets the caterpillars blend into their surroundings, reducing predation. D) Looking like their food source will increase the caterpillars' feeding efficiency; this would increase their growth rate and survival rate.
The relationship between the fungi and algae in lichens is best described as
A. a possible controlled parasitism wherein the fungi withdraw food from the algae and the algae do not benefit from the association. B. a possible controlled parasitism wherein the algae are moistened and protected by the fungi, but the fungi do not benefit from the association. C. a simple cooperative mutualism between normally free-living strains. D. an endosymbiotic transfer of the chloroplasts of algae to the hyphae cells. E. a complete mixing of the genomes of the two groups at the cellular level.
Which of the following is true of a cell membrane?
A. They allow all substances to pass B. It's selectively permeable C. Cell membranes surround plant, animal, and bacteria cells D. It's a bi-layer composed of phospholipids and proteins
Smooth muscle in the bladder contracts to send urine into the urethra.
Answer the following statement true (T) or false (F)