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

Biology & Microbiology

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In higher plants, thylakoids are arranged into stacks called ____

a. stroma b. stomata c. photosystems d. grana e. stromal lamellae

Biology & Microbiology

Sex ratio at birth is called the ________ sex ratio.

A) primary B) secondary C) tertiary D) quaternary

Biology & Microbiology

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

Biology & Microbiology

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.

Biology & Microbiology