The dark middle layer of the eye that prevents
the scattering of light is the
a. fovea.
b. retina.
c. sclera.
d. choroid.
e. cornea.
D
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Ethanol can be easily produced from:a
photosynthetic pigments. b. crystalline cellulose. c. root systems of plants. d. plant sugars. e. all of these.
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and the buoyancy of water provides physical support. What adaptation did plants have to make in taking up gasses without drying out when they moved to dry land?
a. Production of pollen b. Development of stomata c. Development of vascular tissue d. Production of a cuticle e. Production of lignin
Instead of phylum, plants use which category?
a. division b. subspecies c. class d. subkingdom
MacConkey Agar selects for growth of which type of organism?
A) Gram-positive B) Gram-negative