In complex land plants, the diploid stage is resistant to adverse environmental conditions, such as dwindling water supplies and cold weather. The diploid stage progresses through which sequence?
a. gametophyte ? male and female gametes
b. spores ? sporophyte
c. zygote ? sporophyte
d. zygote ? gametophyte
e. spores ? gametophyte
c
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Which law of thermodynamics explains energy inputs and outputs in chemical reactions?
1.the first law of thermodynamics: energy cannot be created or destroyed
2.the second law of thermodynamics: energy tends to spread out spontaneously.
Which of the following statements is NOT true about
the reproductive behavior of voles? a. Oxytocin induces monogamy in female prairie voles. b. Monogamous species have fewer oxytocin receptors than promiscuous species. c. ADH receptors in the brain play a role in monogamy. d. Mountain voles are more promiscuous than prairie voles. e. Male meadow voles are not monogamous.
A malignant melanoma is caused by ____
a. heredity b. viruses c. chemical carcinogens d. radiation e. weakened immunity
What is the likely explanation for the observation that during mass extinctions the size of a taxon's range is no longer positively correlated with its chance of survival?
What will be an ideal response?