Which of the following is an example of a photoautotroph?
A) cyanobacteria in freshwater and marine ecosystems
B) mushrooms growing on the side of a dead tree
C) bacteria in our mouth
D) fungi growing in the refrigerator
E) grizzly bears in Alaska
Ans: A) cyanobacteria in freshwater and marine ecosystems
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In higher plants, thylakoids are arranged into stacks called ____
a. stroma b. stomata c. photosystems d. grana e. stromal lamellae
Sex ratio at birth is called the ________ sex ratio.
A) primary B) secondary C) tertiary D) quaternary
Which of the following is a disadvantage of an
exoskeleton?
a. It does not provide as efficient a muscle anchorage as an endoskeleton. b. It allows for excess water loss. c. It must be shed for its owner to grow. d. It is not flexible enough to allow a full range of movements. e. It is not able to absorb pigments for sufficient camouflage
Pioneers of the American West used the plant called
horsetails a. as pot scrubbers. b. as sandpaper. c. for decoration. d. for kindling. e. for food.