Why do organisms that have indirect development produce hundreds of offspring, whereas those with direct development produce relatively few offspring?
What will be an ideal response?
Organisms that have direct development provide more maternal support in both time and nutrients. Organisms with indirect development provide little, if any, parental support and very few nutrients. With the small parental investment, organisms that have indirect development spread their resources across many, many more offspring.
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Which statement is true?
a. Atmospheric nitrogen (N2) is released by decomposers such as anaerobic bacteria and fungi. b. Atmospheric nitrogen (N2) must be converted to other forms before it can be used by plants. c. Nitrogen fixation is the process that transforms nitrates into atmospheric nitrogen (N2). d. Most nitrogen in soil takes the form of nitrous oxide (N2O) or nitrite (NO2-).
We recognize three levels of biodiversity: genetic
diversity, species diversity, and __________diversity. Fill in the blank(s) with the appropriate word(s).
In Drosophila (fruit fly), red eyes is the wild type trait and purple eyes is a mutant version. Normal wings are wild type while curly wings is a mutant version. Which of the following genotype is correct for a homozygous red eyed, curly winged fly?
a) p+/p+ c/c b) p/p c/c c) p+/p+ c+/c d) p+/p c/c
Which statement about Alzheimer's disease is true?
A) Alzheimer's disease is suspected if a patient cannot retain his or her balance. B) Alzheimer's disease is age-related, increasing in frequency as people age. C) Alzheimer's disease often reverses or improves with time. D) Alzheimer's disease frequently involves positive changes in personality.