Which of the following is an advantage of
having a four-chambered heart?
a. only oxygen-rich blood flows to tissues
b. blood pressure in the separate circuits is not
independently controlled
c. two separate circuits are possible
d. only with a four-chambered heart are lungs
possible
e. more than one of these is an advantage to
having a four-chambered heart
A
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Which statement best describes parasitism?
a. A parasite is harmful to the host. b. A parasite provides nutrients for the host. c. A parasite does not harm the host. d. A parasite does not receive any benefits from the host. e. A parasite always kills its host.
Sessile organisms predominate on sandy/muddy subtidal habitats
Indicate whether the statement is true or false
Four of the following are typical features of anthropoids. Which one is the exception?
a. diurnal b. good eyesight c. color vision d. carnivorous e. dry nose
A __________ ____________ is a protein that influences the ability of RNA polymerase to transcribe a given gene.
Fill in the blank(s) with the appropriate word(s).