Recall Stiling and Drake's experiments using chambers with elevated CO2. What are the implications of their experiment for farmers in the coming decades, if CO2 levels rise as predicted?
A. Farmers will see higher crop productivity and less insect damage, but the crops will be less nutritious.
B. Farmers will see higher crop productivity and nutrition, but there will be more insect damage.
C. Farmers will see lower crop productivity and nutrition, in addition to more insect damage.
D. Farmers will see higher crop productivity, but there will be more insect damage and the crops will be less nutritious.
A. Farmers will see higher crop productivity and less insect damage, but the crops will be less nutritious.
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Incomplete dominance is an example of blending of phenotypes, not genotypes
Indicate whether the statement is true or false
A diabetic, who does not utilize insulin properly, will metabolize fats instead of glucose. A condition called diabetic ketoacidosis is a common result of excessive fat metabolism, causing blood pH values of 7.1 or less (normal range is 7.35-7.45). What
has happened to the blood pH and why? A) The pH is above normal (basic) because the ketones are too basic. B) The pH is below normal (acidic) because the buffering capacity was exceeded. C) The pH is not affected because the blood buffers can absorb the excess H+. D) The pH is below normal because buffers can donate OH+.
In which of the following situations would speciation be most likely to occur?
A) A population of juniper shrubs is split in two by a canyon. Every year, strong winds carry a small amount of the shrubs' pollen across the canyon. B) A Japanese mollusk species whose larvae are often carried from port to port in ship bilge (waste) water now flourishes in San Francisco Bay, a busy commercial port. C) Bighorn sheep occupy mountains from Canada to Death Valley in Southern California, interbreeding all the way. The populations at the two ends of the range live in very different environments. D) Seven monkeys escape from an enclosure. To everyone's surprise, they establish a small but viable population, coexisting successfully with humans in a partly suburban environment very different from their native African habitat.
It is possible to make seedless tomatoes by removing the anthers of the flower and putting a hormone (auxin) on the stigma of the tomato flower
Weekly applications are required. Over the course of development, the stigma and style fall off, and the ovary develops into a normal-looking tomato with no seeds. Normally, seed and fruit formation are coordinated using hormone signaling. What does the application of auxin indicate? A) The stigma of a tomato flower produces auxin that is necessary for pollination. B) Auxin stimulates the development of the pericarp into the ovary wall. C) Applied auxin must substitute for an auxin source in a developing seed. D) Auxin is naturally produced by pollen and transferred, along with genetic material, to the flower.