Glucagon is produced by the
a. adrenal cortex.
b. adrenal medulla.
c. thyroid.
d. kidneys.
e. pancreas.
E
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Which animal phylum lacks a network of nerve cells for gathering information from the environment?
A. Porifera - sponges B. Cnidaria - jellyfish, sea anenomes C. Platyhelminthes -- flatworms D. Nematoda - roundworms E. Mollusca - octopus, squid, clams, snails, and other mollusks
Red algae
a. are primarily marine organisms. b. are thought to have developed from green algae. c. contain xanthophylls as their main accessory pigments. d. are mostly unicellular. e. are all of these.
The storage form of sugar in animal cells is.
a) starch b) glycogen c) cellulose d) lactose
Which of the following limitations of the linear probability is not problematic in the event that the only treatment variable in your regression (X or right-hand side), is a binary variable?
A. The errors of the model have to be homoscedastic. B. The errors of the model have to be heteroscedastic. C. The predictions might not fall between zero and 1. D. The coefficients might be negative.