You take a break from raking your lawn to examine a leaf. While turning it over in your hands, you are struck by the way the veins in the leaf resemble a tree with many branches. You’re not sure which plant dropped this leaf, but there’s one thing you do know about it. What is that?
a. The plant’s leaves are sessile.
b. The plant’s phyllotaxy is whorled.
c. The plant is a dicot.
d. The plant is coniferous.
c. The plant is a dicot.
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What is the nature of the genetic mutation that causes lactose intolerance?
A. It is a dominant mutation that prevents lactase production. B. It is a dominant mutation that causes a decline in adult lactase levels. C. It is a recessive mutation that prevents lactase production. D. It is a recessive mutation that causes a decline in adult lactase levels. E. It is an X-linked mutation that prevents lactase production.
Most chordates are ________
A) invertebrates B) vertebrates C) insects D) None of the above
________ has the same optical qualities as glass and thus prevents refractive loss of light as it passes from the slide to the objective lens.
Fill in the blank(s) with the appropriate word(s).
What factors produce genetic diversity in bacteria?
A) mitosis B) crossing over C) mutation and gene transfer D) crossing over and independent assortment