Answer:
usatestprep answer is D) mutant
Explanation:
Mutant individuals, or those that carry genetic abnormalities, often supply the variety that is necessary to survival of a population. It is the variation in genetic code which gives some individuals a unique advantage - larger capacities, ability to resist disease, etc.
Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Active transport uses ATP and does not require a carrier protein; facilitated diffusion does neither.
Facilitated diffusion uses ATP and requires a carrier protein; active transport does not.
Answer:
Active transport uses ATP and moves substances against the concentration gradient; facilitated diffusion does not.
Explanation:
Active transports moves against the concentration gradient (hence why it needs energy or ATP to do so, its going "against the grain"). Facilitated diffusion does not require ATP but does something require carrier proteins during passive transport.
• Truck 1 started from rest at the top of a 22-meter hill and coasted toward the intersection.
.
Truck 2 was on a flat stretch of road at the bottom of the hill directly in front of Truck 1.
At the bottom of the hill, Truck 1 was going 20 m/s; Truck 2 was going 35 m/s.
.
There were no skid marks left by Truck 2. The collision occurred at the stop sign where Truck 2 had
stopped
• After the collision, both trucks moved together in the same direction at 10 m/s before slowly rolling
to a stop.
You must now push Truck 2, using 1,000 N of force, 8 meters off to the side of the road so no one
else gets hurt.
1. What was the potential energy of Truck 1 at the top of the hill? 2. What was the kinetic energy of each truck before the began braking? 3. A. How much energy did truck 1 lose from the top to the bottom of the hill? B. Where do you suppose that energy went?
Answer:
1) Kinetic energy of the truck 1 is 600,000 joules.
Kinetic energy of the truck 2 is 1,837,500 joules.
2 a)Potential energy of truck 1 is 646,800 Joules.
b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.
Step-by-step explanation:
Mass of the truck 1 and truck 2,m = 3000 kg
Velocity of the truck 1, = = 20 m./s
Velocity of the truck 2, = 35 m./s
1. Kinetic energy of the truck 1:
Kinetic energy of the truck 2:
2.a) Energy loose by the truck 1:
Initial height of the truck on the hill = 22 m
At that height potential energy will be maximum:
Potential energy of truck 1 at that height =
b) Energy lose by the truck 1 just got converted into heat and sound energy during the collision.
\
The potential energy of Truck 1 at the top of the hill is 646,800 J. The kinetic energy of each truck before they began braking is 600,000 J for Truck 1 and 3,712,500 J for Truck 2. The energy lost by Truck 1 from the top to the bottom of the hill is 646,800 J, which is converted into kinetic energy and transferred to Truck 2 during the collision.
1. The potential energy of Truck 1 at the top of the hill can be calculated using the formula PE = mgh, where m is the mass of the truck, g is the acceleration due to gravity, and h is the height of the hill. Plugging in the values, PE = (3,000 kg)(9.8 m/s^2)(22 m) = 646,800 J.
2. The kinetic energy of each truck before they began braking can be calculated using the formula KE = 0.5mv^2, where m is the mass of the truck and v is the velocity. For Truck 1, KE = (0.5)(3,000 kg)(20 m/s)^2 = 600,000 J. For Truck 2, KE = (0.5)(3,000 kg)(35 m/s)^2 = 3,712,500 J.
3.A. The energy that Truck 1 lost from the top to the bottom of the hill can be calculated by subtracting the potential energy at the top from the kinetic energy at the bottom. Therefore, energy lost = PE(top) - KE(bottom) = 646,800 J - 0 J = 646,800 J.
3.B. The energy is converted into kinetic energy and transferred to Truck 2 when they collide. The collision between the two trucks results in an increase in kinetic energy for Truck 2 and a decrease in kinetic energy for Truck 1.
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b. Human
c. Porpoise
d. Bat
a. 1 only
b. 2 and 2
c. 1 and 2
d. 1, 2, and 3
B. Angiosperm
C. Water and warmth
D. Animals and wind
Answer:
C. water and warmth, hope this helps :)
A. A microbiologist with the U.S. Geological Survey grew crescent-shaped fungal spores in a lab on refrigerated plates.
B. A specialist with the New York State Health Department, on an exploration, found dead bats with white noses.
C. A specialist with the New York State Health Department detected crescent-shaped fungal spores when examining a sample swabbed directly from a living bat with a white nose.
D. A microbiologist with the U.S. Geological Survey grew crescent-shaped fungal spores in a lab at room temperature.
Answer:
The correct answer are option A. "A microbiologist with the U.S. Geological Survey grew crescent-shaped fungal spores in a lab on refrigerated plates" and option C. "A specialist with the New York State Health Department detected crescent-shaped fungal spores when examining a sample swabbed directly from a living bat with a white nose".
Explanation:
Doctor Blehert and Doctor Behr are two scientists that are studying the relationship between fungal disease and the development of the bat white nose syndrome. In order to prove that bat white nose syndrome is caused by a fungal disease Blehert and Behr first took samples in the field and later analyzed the samples in the laboratory. First, a specialist with the New York State Health Department detected crescent-shaped fungal spores when examining a sample swabbed directly from a living bat with a white nose. Later, the samples taken from the shaped fungal spores were grew in the laboratory on refrigerated plates by a microbiologist with the U.S. Geological Survey. After analyzing the samples, the scientists conclude that the bat white nose syndrome is caused by a fungal disease.
The pair of statements that represent a direct field observation and a reinforcing lab observation are 'A specialist found dead bats with white noses' and 'A microbiologist grew crescent-shaped fungal spores in the lab'. These statements show how an initial field observation of bats' white noses led to a lab study where the associated fungus was grown, solidifying the link between the two.
The correct pair of statements representing an observation made directly in the field and then reinforced in the lab are B and A respectively. Let's understand why:
B. A specialist with the New York State Health Department, on an exploration, found dead bats with white noses. This constitutes an initial observation in the field of study. The specialist observed that bats in their natural habitat had contracted a peculiar condition (white noses) and were subsequently dying. This spurred the need for further investigation.
A. A microbiologist with the U.S. Geological Survey grew crescent-shaped fungal spores in a lab on refrigerated plates. After the field observation, the phenomena was then studied in a controlled lab setting. The microbiologist was able to grow the similarly crescent-shaped fungal spores, that were suspected to cause the white noses, in lab conditions. This confirmed the field observation and further strengthened the potential link between the observed white-nose condition in bats and the presence of this particular fungus.
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