The only effective way to store bacterial cultures for short periods of time is to arrest their metabolism by freezing
Indicate whether the statement is true or false
FALSE
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What do you think would result if nitrogen-fixing cyanobacteria populations suddenly declined?
A. Aquatic primary production would decline, particularly in regions not subject to fertilizer runoff. B. Legumes would cease to grow, but other types of plants would be unaffected. C. Both the aquatic and terrestrial populations of autotrophs would collapse. D. Populations of denitrifying bacteria would expand to take over their role, creating only a temporary disruption. E. More nitrogen would become available for other aquatic autotrophs.
Crossing over occurs during
A) prophase I. B) metaphase I. C) prophase II. D) metaphase II.
Describe the path that the blood takes as it travels through the kidney, and the changes that take place in its composition as it moves through each structure of the kidney
What will be an ideal response?
Which of the following is an example of positive feedback?
A) A rise in body temperature stimulates sweat. This causes the body to cool down to normal temp. B) Eating a sugary donut raises blood sugar. This stimulates the pancreas to release insulin. C) Your blood pressure falls below normal, so the nervous system increases heart rate to bring blood pressure back to a normal range. D) During childbirth, increasing levels of oxytocin hormone is released to increase the strength of uterine muscle contractions.