These act as rivets anchoring adjacent cells together at spots throughout the cell.
A. desmosomes
B. fibronectin
C. hemidesmosomes
D. adherens junctions
E. focal adhesions
Answer: A
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What characteristic does not describe a vertebrate?
a. notochord. b. backbone. c. exoskeleton. d. gills or lungs. e. posterior tail.
The main difference between a mature zygospore and a young zygospore is that the young zygospore is:
a. haploid b. equivalent to a fruiting body c. diploid d. dikaryotic e. fertilized
The laryngeal nerve is 15 feet long in giraffes because
A) a giraffe's throat is located far away from its brain. B) this nerve connects to the spinal cord. C) the nerve is modified from an ancestor that did not have a neck. D) this nerve is a vestigial organ.
Suppose you have many observations of the price of refrigerators, with other characteristics including their energy cost as well as whether or not they are stainless steel. Now, suppose you ran the standard linear regression of price on energy cost: Pricei = ?0 + ?1 Energy Costi + Ui and got an estimate of ?1. Now, suppose you know that stainless steel refrigerators are more popular (i.e., sell for higher prices holding all other characteristics constant) and tend to be in more energy efficient (i.e., lower energy cost) refrigerator models. What should you expect your estimate of ?1 in the following regression Pricei = ?0* + ?1*Energy Costi + ?2* Stainless Steeli + Ui to be?
A. ?1* > ?1 B. ?1* = ?1 C. ?1* < ?1 D. You cannot tell from the information given.