BIO 373 EXAM 2 CORRECT 100%
Which statement best explains why tropical plants may lose function at temperatures
as high as 10°C, while alpine plants can function at temperatures close to freezing?
Water in the soil flows from points with high soil-water potential energy to points of
lower potential energy. How many of the following processes are influenced by the
soil water potential?
- Plant water extraction rate,
- Drainage amount,
- Upward water movement (capillary rise),
- Soil temperature changes,
- Contaminant transport rates
1 - ANSWER5
Which of the following is NOT a heterotroph?
Chemosynthetic archaea synthesizing carbohydrates
Bacteria consuming dissolved organic compounds
Parasitic protozoa living in the gut of a pig
Fungi feeding on soil detritus - ANSWERChemosynthetic archaea synthesizing
carbohydrates
-The enzymes of tropical plants become denatured at 10°C, whereas the enzymes of
alpine plants do not.
-The membranes of alpine plants have a higher proportion of unsaturated lipids,
making them less sensitive to lower temperatures.
-The metabolic coordination of alpine plants makes them able to withstand lower
temperatures.
-The alpine plants can function even when their membranes have solidified, whereas
the tropical plants cannot. - ANSWER-The membranes of alpine plants have a
higher proportion of unsaturated lipids, making them less sensitive to lower
temperatures.
A mouse is sitting in the sun. Solar radiation provides a net intake of energy of 30
Joules per minute, and infrared radiation provides an additional net input of 8 Joules
per minute. Conductive and convective outputs are a combined 55 Joules per
minute. There is no detectable change in heat from evaporation. Assuming that the
mouse is maintaining a constant temperature, how much heat must it be generating
per minute?
17 joules
25 joules
33 joules
Which statement best explains why tropical plants may lose function at temperatures
as high as 10°C, while alpine plants can function at temperatures close to freezing?
Water in the soil flows from points with high soil-water potential energy to points of
lower potential energy. How many of the following processes are influenced by the
soil water potential?
- Plant water extraction rate,
- Drainage amount,
- Upward water movement (capillary rise),
- Soil temperature changes,
- Contaminant transport rates
1 - ANSWER5
Which of the following is NOT a heterotroph?
Chemosynthetic archaea synthesizing carbohydrates
Bacteria consuming dissolved organic compounds
Parasitic protozoa living in the gut of a pig
Fungi feeding on soil detritus - ANSWERChemosynthetic archaea synthesizing
carbohydrates
-The enzymes of tropical plants become denatured at 10°C, whereas the enzymes of
alpine plants do not.
-The membranes of alpine plants have a higher proportion of unsaturated lipids,
making them less sensitive to lower temperatures.
-The metabolic coordination of alpine plants makes them able to withstand lower
temperatures.
-The alpine plants can function even when their membranes have solidified, whereas
the tropical plants cannot. - ANSWER-The membranes of alpine plants have a
higher proportion of unsaturated lipids, making them less sensitive to lower
temperatures.
A mouse is sitting in the sun. Solar radiation provides a net intake of energy of 30
Joules per minute, and infrared radiation provides an additional net input of 8 Joules
per minute. Conductive and convective outputs are a combined 55 Joules per
minute. There is no detectable change in heat from evaporation. Assuming that the
mouse is maintaining a constant temperature, how much heat must it be generating
per minute?
17 joules
25 joules
33 joules
