In which of these animals are ingested nutrients NOT degraded by gut microbiota before reaching the small intestine?
a. sloth
b. colobine monkeys
c. horses
d. macropod marsupials
Answer: C
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Points of adhesion between adjacent cells characterized by cadherins interacting with intermediate filaments are referred to as ____
Fill in the blank with the appropriate word.
Which of the following cycles is thought to be most under biological control?
A) oxygen B) phosphorus C) sulfur D) lead
Sympathetic nerves have what effect on systemic arterioles?
A) vasodilation B) vasoconstriction C) vasospasm D) vasoconstriction and vasospasm E) neither vasodilation or vasoconstriction, but may cause vasospasm
You examine a worm that has two genders: males that produce sperm and hermaphrodites that produce both sperm and eggs. The diploid adult has four homologous pairs of chromosomes that undergo very little recombination
Given a choice, the hermaphrodites prefer to mate with males, but just to annoy the worm, you pluck a hermaphrodite out of the wild and fertilize its eggs with its own sperm. Assuming that all the resulting offspring are viable, what fraction do you expect to be genetically identical to the parent worm? Assume that each chromosome in the original hermaphrodite is genetically distinct from its homolog. (a) all (b) none (c) 1/16 (d) 1/256