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NeTakaya
3 years ago
13

BIOLOGY HELP PLEASE!!! 15 POINTS

Biology
1 answer:
Gnom [1K]3 years ago
3 0
Active transport is a process requiring energy in which a substance crosses the cell membrane.  When the nerve cell is in its resting potential, there are the positively charged sodium ions and the negatively charged potassium ions. During depolarization, the neuron fires, wherein the active transport plays its role: the positive ions are forced in and the negative ions are forced out. When depolarization is done, these ions are again back to normal through active transport.<span>
</span>
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Inherited disease can be caused by damage to DNA caused by _________.
never [62]

Answer:

A. DNA Polymerase

Explanation:

It absolutely cannot be C. Ozone or D. Radiation since those two answers are in relation to outside variables affecting health. Not inherited diseases. Therefore, it is in between A. or B.

7 0
2 years ago
Read 2 more answers
What organism is scientist tyrone hayes searching for in the wetlands
Margarita [4]

For biologist and herpetologist Tyrone Hayes, scientific breakthroughs don't begin and end in the laboratory. They also come from the field. Which is why, more often than not, you'll find Hayes wet, muddy, and knee-deep in an African swamp at 2 a.m., the time when the frogs come out.

Hayes grew up in South Carolina, and, as a boy, one of his favorite pastimes was tracking down the region's abundant turtles, snakes, and toads. That abiding fascination led Hayes to earn an undergraduate degree in organismic and evolutionary biology from Harvard University. He later received a Ph.D. in integrative biology from the University of California, Berkeley, where he currently serves as a professor.

Hayes says an interest in frog hormones, specifically those of a tiny reed frog common in Ethiopia and Uganda, sparked his interest in his current fieldwork. "Surprisingly, frog hormones are very similar, and in some cases identical, to human hormones," he says. "So what affects a frog may also affect humans."

It was during a night in the boggy African bush that Hayes's flashlight revealed an unexpected discovery: Several members of the reed frog genus had changed color. Males, which are normally green, had taken on the reddish background and white spots of females.

Seeking to understand why, Hayes arrived at a theory: During the metamorphosis from tadpole to adult, frogs are very sensitive to changes in their environment, including chemicals in the water or in their food supply. So the change in coloration indicated that the frogs' extremely thin, sensitive skin was reacting to contaminants in the water. Thousands of frogs later, Hayes and his research team have proved the theory correct.

Reed frogs, indeed, serve as tiny red flags that can warn when dangerous, even cancer-causing chemicals are present in a water source. These harmful substances may contain or act like hormones, triggering the color transformation. Contaminants include plastic by-products, pesticides in crop sprays such as DDT, and synthetic hormones such as DDS. Because they cannot be broken down during sewage treatment, the toxins flow into marshes and lakes.

"This is the same water people cook and bathe with," Hayes notes. "We've found developmental changes in tadpoles when water contains contaminants 50 times lower than what's allowed in U.S. drinking water. If chemicals in such low concentrations can impact amphibians, mammals may also be affected."

Hayes realized his simple observation could have enormous practical applications: Reed frogs could become a low-cost way to test for water pollution in developing countries. Local residents would only need to raise the frogs in questionable water sources and observe their color as adults to check for contaminants.

Hayes's findings reveal a crucial new link between conservation and health.

7 0
3 years ago
What is the probability of a pea plant with genotype rryy producing a gamete with genotype ry?
andrew-mc [135]

The probability of a pea plant with genotype rryy producing a gamete with genotype ry is 1.

<h3>What would be the probability of a pea plant producing genotype ry from the genotype rryy?</h3>

  • Probability is a measurement used in genetics to forecast the likelihood that a desired trait will be acquired by a child. The most easiest way to calculate the probabilities is to make a punnet square.
  • The genotypes of a specific cross or breeding experiment are predicted using the Punnett square, a square diagram. It bears Reginald C. Punnett's name, who developed the method in 1905. Biologists use the figure to calculate the likelihood that a child will have a specific genotype.
  • If we employ a punnet square for the genotype rryy producing a gamete with genotype ry the probability would be 1. You can refer the diagram for the understanding of the punnet square.
  • F1 genotype: rryy
  • F2 genotype: ry ry ry ry
  • Thus the probability would be 1.

To learn more about genotype refer:

brainly.com/question/22117

#SPJ4

4 0
1 year ago
O avoid compromising your car's aerodynamic properties, you should avoid ________.
Len [333]

Answer:

to carry heavy load on the vehicle's outside

Explanation:

Aerodyanmic properties of a car refer to its interactions with moving air and the properties which govern smooth movement of the car through air. Aerodynamics of a car address the concerns like lowering noise emission, prevention of heavy load and avoiding the luggage dragging.

Now when there will be great load outside the car,the air will resist the movement of car more, so it will be difficult for the car to cut through the air. Moreover, when a car carries huge amount of load outside its body, the frictional force by aerodynamic drag increases greatly. This can badly effect the performance of high speed cars like sports cars but for other normal cars it poses less hazards.

Hope it helps!


8 0
3 years ago
If a rock cuts across another rock, then the rock doing the cutting is A. older than the rock getting cut. B. younger than the r
svlad2 [7]
B.<span>younger than the rock getting cut.

</span>
4 0
3 years ago
Read 2 more answers
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