A population ecologist is studying the demographics of American bison living on a grassland in North Dakota. She
captures, marks, and releases 100 bison. Later, she recaptures 100 bison and discovers that 50 were previously marked
and half of those marked are of reproductive age. What is the population ecologist’s estimate of how many bison in the
total population are of reproductive age?
a. 200
b. 50
c. 100
d. 20
e. 10
ANSWER: c
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Different transport systems for the same nutrient that are part of the same organism are usually regulated in different ways.
Answer the following statement true (T) or false (F)
A water-vascular system is characteristic of the
phylum a. Arthropoda. b. Annelida. c. Chordata. d. Mollusca. e. Echinodermata.
What is the maximum number of electrons in a shell?
a. 0 b. 2 c. 6 d. 8 e. 12
Nearly all marsupials are found in ________
Fill in the blank(s) with correct word