Which of the following statements describe advantages that seeds have over spores?
_____ Seeds have tough walls that allow dispersal through the air.
_____ Seeds are produced in greater numbers.
_____ Seeds are able to store food.
_____ Seeds employ various means of dispersal, allowing colonization of more diverse habitats.
_____ Production of seeds does not require water as a medium for sperm transport.
_____ Seeds have tough walls that allow dispersal through the air.
_____ Seeds are produced in greater numbers.
__X__ Seeds are able to store food.
__X__ Seeds employ various means of dispersal, allowing colonization of more diverse habitats.
__X__ Production of seeds does not require water as a medium for sperm transport.
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Which plant cell structure is comprised of approximately 300 chlorophyll molecules and about 40 carotenoid
pigments, organized together to optimize the capture of light energy?
a. reaction center b. chlorophyll c. antenna complex d. cytochrome complex e. stomata
The longer this structure is the greater is an animal's capacity to conserve water and to concentrate
solutes for excretion in the urine. a. Bowman's capsule b. loop of Henle c. proximal tubule d. ureter e. urethra
Which substance is not a known carcinogen?
A) certain viruses B) ultraviolet light C) cigarette smoke D) pet dander
A recent series of TV commercials promoted the idea that a woman who wants to have a healthy baby must begin to eat well and avoid some medications and alcohol before she knows she is pregnant. Why?
What will be an ideal response?