First line defenses have what aspect in common with each other?

a. They involve the production of antibodies.
b. They recognize specific pathogens.
c. They are physical barriers against invading pathogens.
d. They involve unique cells that attack invading pathogens.


Answer: c. They are physical barriers against invading pathogens.

Biology & Microbiology

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. During DNA replication, the ____ strand is assembled in the ____ direction from helix unwinding and is synthesized

by ____ replication

a. leading; opposite; continuous b. lagging; same; discontinuous c. leading; same; discontinuous d. lagging; opposite; continuous e. leading; same; continuous

Biology & Microbiology

At which gestational age does a developing human fetus first look obviously human and not like other vertebrate embryos?

A) 2 weeks B) 4 weeks C) 9 weeks D) 4 months

Biology & Microbiology

The light that passes through the pupil is focused by the lens on the

A. iris. B. sclera. C. choroids. D. retina. E. lens.

Biology & Microbiology

Select all of the following that lower an individual's carbon footprint.A) Heating through passive solar and geothermal energyB) Carpooling or taking public transportationC) Eating a diet rich in beef and dairyD) Eating foods that are grown faraway in other countries

What will be an ideal response?

Biology & Microbiology