Which of the following is NOT an example of a human activity that directly threatens the biodiversity of species?

a) the destruction of habitats
b) the picking of flowers
c) the introduction of invasive species
d) the overexploitation of resources
e) the burning of fossil fuels


Answer: b) the picking of flowers

Biology & Microbiology

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What type of pathogen is targeted by a cytotoxic T cell?

A. an encapsulated bacteria B. an opsinized pathogen C. a virus-infected host cell D. All of the answer options are correct.

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What is the major protein in the myofilament that is composed of two intertwined strands?

a. actin
b. chromatins
c. lamins
d. tubulins
e. lamellae

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If a muscle cell of a typical organism has 32 chromosomes, how many chromosomes will be in a gamete of that same organism?

a) 64 b) 8 c) 32 d) 16

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A young farmer purchases some land in a relatively arid area and is interested in earning a reasonable profit for many years. Which of the following strategies would best allow the farmer to achieve such a goal?

A) establishing an extensive irrigation system B) using plenty of the best fertilizers C) finding a way to sell all parts of crop plants D) selecting crops adapted to arid areas

Biology & Microbiology