The outer membrane of the nucleus is continuous with the membrane of which other organelle?
A. mitochondrion
B. endoplasmic reticulum
C. peroxisome
D. Golgi apparatus
E. endosome
Ans: B. endoplasmic reticulum
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The Panamanian golden frog is in decline because of __________, which are being driven by ____________.
A. outbreaks of a virus, global climate change B. outbreaks of a fungus, deforestation C. introduced species, increased global trade D. outbreaks of a fungus, global climate change E. outbreaks of a virus, deforestation
Which hormone results in the production of more neurons in the higher vocal center of the brains of male, but not
female, zebra finches?
a. testosterone b. estrogen c. octopamine d. epinephrine e. androgen
The important feature of all cells that react to a specific hormone is (are) the
a. type of blood supply they receive. b. proximity of the endocrine gland. c. presence of an appropriate receptor molecule. d. characteristics of their plasma membranes. e. presence of specific genes responsive to the hormone.
Every node in a phylogenetic tree represents a(n) ________
A) common ancestor B) extinction event C) transitional form D) sister species