What do rod and cone cells do in the eye?
What will be an ideal response?
Both are photoreceptors in the retina. Rods use the photo pigment rhodopsin to detect the brightness of the light. In humans, there are three different kinds of cones, each with visual pigments to detect red, green, or blue light. Color vision depends on which type(s) of cones are stimulated and how much.
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Certain plants have been genetically modified to secrete citrate, which helps
A. make the phosphate in soils more soluble. B. plants make necessary micronutrients. C. reveal mineral deficiencies in a plant. D. make hydroponic growth possible. E. plants add metals to the soil in which they are growing.
The volcanic island Selkirk arose from the North Atlantic off Iceland in 1948. The first organisms to start living there are said to be ________
A) central species B) climax species C) pioneer species D) rogue organisms
The digestion of proteins, lipids, and carbohydrates is completed in the ________
Fill in the blank(s) with correct word
You created a worm that expresses a human Bcl-2 transgene, and you are crossing the transgene into a homozygous ced-9 mutant background. However, you inadvertently used a clone of Bcl-2 with a mutation in the BH domain, which is essential for function. What results do you expect for the ced-9 mutants with the mutant Bcl-2 transgene?
A. All 1090 cells will live. B. All 1090 cells will die. C. 131 cells will die. D. 959 cells will die.