Natural selection should favor plants producing small seeds in wet environments and plants that produce larger seeds in dry environments
Indicate whether the statement is true or false
TRUE
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The contractile unit of a skeletal muscle fiber is a(n) ____
a. myofibril b. sarcomere c. myosin filament d. actin filament e. Z line
__________ covers and protects the outer surfaces of primary plant parts. Fill in the blank(s) with the appropriate word(s)
The onset of puberty is triggered by maturation of the brain, which stimulates the hypothalamus to secrete
A) testosterone. B) progesterone. C) gonadotropin-releasing hormone (GnRH). D) luteinizing hormone (LH). E) chorionic gonadotropin (CG).
Which of the following are central ideas explaining the benefits of sexual reproduction?
a. Sexual reproduction raises the fitness of populations by allowing diseases to spread faster therefore becoming less virulent. b. Sexual reproduction purges deleterious mutations. c. Sexual reproduction leads to recombination. d. Sexual reproduction strengthens coadapted gene complexes. e. B and C.