Ecological density is a measure of the number of individuals per unit of available living space
Indicate whether the statement is true or false
TRUE
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Why is photorespiration more likely to occur during warm weather?
a. Plants require warm weather (at least 23°C) to drive photosynthesis. b. Plants are more likely to close their stomata in the nighttime than during the day. c. Plants are more likely to dehydrate in warm weather, forcing them to close the stomata to conserve water, thus preventing CO2 from entering the leaf. d. The rubisco enzyme is very temperature sensitive and becomes less efficient in warmer temperatures, allowing it to fix O2 instead of CO2. e. Plants use up the water in their central vacuoles in warm weather, inhibiting the water-requiring light reactions; this in turn alters the activity of rubisco.
Organisms such as lizards that need to maintain body temperature through external means do so by
A. running frequently to warm up. B. sunbathing. C. swimming in geothermal pools. D. eating large meals to provide calories for heat production. E. shivering to produce heat.
Put the following events in the correct sequence for a protein that will be secreted from the cell
A. SRP binds to the growing polypeptide chain and to the ribosome. B. Translation resumes. C. SRP binds to its receptor. D. The signal sequence is cleaved. E. Protein synthesis begins in the cytosol. F. Translation pauses.
You have isolated a cell with a peptidoglycan cell wall. You can safety assume that this cell does NOT have:
A. Flagella B. Capsules C. A nucleus D. A chromosome