If a plant exhibits determinate growth, the plant
A. sends out tendrils to support the plant.
B. stops growing when it reaches its mature size.
C. produces auxiliary roots to assist in stabilization of the plant.
D. produces seeds only at one time during its life.
E. continues to grow until it fills its available space in its habitat.
B. stops growing when it reaches its mature size.
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In mammals, females have two copies of the X chromosome, whereas males have only one copy. Dosage compensation is accomplished in mammals by:
A. females inactivating the X chromosome from the mother in all the cells. B. males inactivating the X chromosome from the father in all the cells. C. females expressing the X-encoded genes at 2 times the level of the male. D. males expressing the X-encoded genes at half the level of the female. E. females possessing a randomly inactivated X chromosome in all cells.
What is an organism's advantage to having a single reproductive event in a lifetime rather than being able to reproduce repeatedly? a. Reach a higher level of reproductive maturity
b. Having to raise only one group of offspring. c. Being able to invest all its energy into the production of offspring. d. Being able to divide energy among growth, reproduction and maintenance.
The white cliffs of Dover, England are composed of the fossilized remains of:
1.diatoms
2.foraminifera
3.euglenoids
4.radiolarians
Fusion would be used to fuse hydrogen atoms to form
a. carbon. b. oxygen. c. nitrogen. d. helium. e. phosphorus.