What is direct economic value?
What will be an ideal response?
Answer: Humans depending on plants and animals for food, clothing, energy, medicine, and shelter.
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A pine tree is called a sporophyte because it
a. develops from a germinated spore. b. produces spores by meiosis. c. is haploid. d. undergoes fertilization. e. reproduces by both sexual and asexual means.
Which of the following is not a function of the placenta?
a. exchanges blood between mother and fetus b. secretes hormones to maintain pregnancy c. provides oxygen for the fetus d. eliminates wastes from the fetus e. provides nutrients for the fetus
If you inflate a balloon and then let it go, the air rushing out moves the balloon in a way that is similar to the way that a ________ moves
A) snake B) kangaroo C) squid D) shark
Separation of the chromatids at the end of metaphase leads into the next phase, which is:
A) anaphase. B) post-metaphase. C) telophase. D) interphase. E) prophase.