The structure that attaches a leaf to the rest of the plant is the:
A) stoma. B) petiole. C) blade. D) stem.
Answer: B
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Which of the following is true of embryo
cloning? a. It occurs all the time in nature. b. It involves the genetic contribution of two parents. c. It produces identical offspring. d. "Artificial twinning" is a laboratory application of the process. e. All of these are true
DNA carries the genetic material while ____________________ processes the genetic information to build proteins in
cells. Fill in the blank(s) with the appropriate word(s).
A reddish chemical, lipofuscin, is found in greater quantities in cells of older people than in those from younger people. This chemical should be broken down in the cells. Which specific type of organelle is not working as well in the seniors?
A) lysosome B) mitochondrion C) nucleus D) rough endoplasmic reticulum
In the sigmoid growth curve, the number of individuals at any one time is indicated by what symbol?
A. ri B. N C. N/K D. K E. dN/dt