The slowly decaying organic litter from plant and animal tissues that is found in the soil is called ________.
Fill in the blank(s) with the appropriate word(s).
humus
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On which portion of the hemoglobin molecule does carbon dioxide bind?
a. protein chain b. cholesterol side chains c. iron in the cytoplasm d. heme group e. nuclear side chains
Researchers studying an endangered lizard species find a successful population of the lizard in a certain area. The researchers determine that this population has reproduced primarily through parthenogenesis. What are the researchers likely to recommend to conservation officials who are trying to protect the species?
a) move the successful population to a different area where lizard populations are struggling b) remove all lizards from the wild and place them in a captive breeding program c) remove as many predators as possible from the area with the successful population d) try to prevent changes to the environment in the area with the successful population
Which organelle contains enzymes that can oxidize various organic substances?
a) Vacuole b) Peroxisome c) Golgi complex d) Centriole
Which of the following relationships is INCORRECT?
A. maternal effect genes activate gap genes B. segment polarity genes regulate pair-rule genes C. maternal effect genes activate pair-rule genes D. pair-rule genes regulate segment polarity genes E. gap genes activate pair-rule genes