Could both the food competition hypothesis and the sexual competition hypothesis explain why giraffes have long necks? Why or why not?
a. No. In science, only one hypothesis can be correct.
b. No. Observations have shown that the food competition hypothesis cannot be correct.
c. Yes. Long necks could be advantageous for more than one reason.
d. Yes. All giraffes have been shown to feed at the highest possible height and fight for mates.
Answer: c. Yes. Long necks could be advantageous for more than one reason.
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a. megaspore b. sporophyte c. microspore d. gametophyte
An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many protons does boron have? An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many protons does boron have?
a. 5 b. 11 c. 6 d. 16 e. 0
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A. dihaploidy. B. viviparity. C. eusociality. D. haplodiploidy. E. didiploidy.
Exterior to the plasma membrane, plant cells have ________ which protect and support the plant cell.
Fill in the blank(s) with the appropriate word(s).