Which of the following is not one of the four supergroups of eukaryotes?

a. Euglenozoa
b. Unikonta
c. Excavata
d. SAR clade
e. Archaeplastida


Answer: a. Euglenozoa

Biology & Microbiology

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What is the organelle shown in this illustration?



a. plant cell
b. thylakoid
c. chloroplast
d. vacuole

Biology & Microbiology

Which type of defense mechanism is not classified as the first line of defense?

a. Chemical barriers b. Skin c. Mechanical barriers d. Physical barriers e. Leukocytes

Biology & Microbiology

Cell walls and cytokines of bacteria are examples of the evolution of resistance to the host immune

response. ____________________ Indicate whether the statement is true or false.

Biology & Microbiology

Scientific study of the population cycles of the snowshoe hare and its predator, the lynx, has revealed that

A) the prey population is controlled by predators alone. B) hares and lynx are so mutually dependent that each species cannot survive without the other. C) multiple biotic and abiotic factors contribute to the cycling of hare and lynx populations. D) both hare and lynx populations are regulated mainly by abiotic factors. E) the hare population is r-selected and the lynx population is K-selected.

Biology & Microbiology