Some trichomes function as protective stinging needles.

As acidity increases, how does this affect the affinity of hemoglobin for the oxygen it carries?

A) Oxyhemoglobin affinity decreases.
B) Oxyhemoglobin affinity increases.
C) Oxyhemoglobin affinity remains the same.
D) Hemoglobin loses its affinity for oxygen.
E) None of the choices are correct.

function predominantly in the sense of smell and taste

A) chemoreceptors
B) mechanoreceptors
C) thermoreceptors
D) photoreceptors
E) pain receptors

In low nitrogen soils, rhizobacteria secrete ____ to help root hairs recognize them.

A) cytokin
B) flavonoids
C) nod factors
D) calcium
E) water

The prevalence of iron-sulfide cofactors in organisms supports the hypothesis that life arose _____.

A) in outer space
B) on tidal flats
C) near geothermal vents
D) in the upper atmosphere
E) in volcanic springs

Platelets ________.

A) are the precursors to leukocytes
B) have multiple nuclei
C) stick to damaged areas of blood vessels and help seal the break
D) none of the above

Amino acids are metabolized by reactions in which the amino group (2NH₂) is first removed, this is known as ________.

A) anaerobic respiration
B) fermentation
C) deamination
D) phosphorylation
E) redox reactions

The subdiscipline of conservation biology that seeks scientific ways to return ecosystems to their state prior to habitat degradation is called

A) organismal ecology.
B) historical ecology.
C) ecosystem ecology.
D) restoration ecology.
E) population ecology.