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bekas [8.4K]
3 years ago
7

Is there a Genetic Basis for Adapting to Life at High Altitudes? A team of scientists from the United States and China set out t

o answer these questions. They began their search for a genetic basis for high-altitude hardiness by looking for genes that differed between the Tibetan people and closely related, but low-dwelling, neighbors. They collected DNA sequence data from 50 Tibetans and 40 nearby Chinese low-dwellers. For comparison, the scientists also collected DNA sequence data from 200 low-dwelling Danes, a more distantly related population.
Biology
1 answer:
Oliga [24]3 years ago
7 0

Answer:

Looking at tibetan highlanders who thrive at high altitudes- normally that would make us sick- they have adapted, 60% oxygen- could pose huge health issue (live with 10% less oxygen in blood than us)

Explanation:

Evolutionary adaptations- involve a change in the genetic makeup to help individuals survive in environment. Tibetans have adaptations to let them function at high altitudes

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Animals with photoreceptors have good vision.<br> a. True<br> b. False
jarptica [38.1K]
<span><span>Photoreceptors are cells</span><span><span> <span>in the retina</span></span><span> that begin the process of seeing. The retina is the back part of the eye that contains the cells that respond to light. These specialized cells are called photoreceptors. They absorb and convert light into electrical signals. These signals are sent to other cells in the retina and ultimately through the optic nerve</span></span><span> <span>to the brain</span></span><span> where they are processed into the images we see. The answer is true. Animals with photoreceptors have good vision.</span></span>
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3 years ago
The _____ is the main means for transmitting messages between the brain and the body.
kiruha [24]

The correct answer is d. spinal cord.

Spinal cord is a bundle of neurons which starts from the brain and runs down the entire length of the back of the body. The spinal cord acts as a main means to transmit the messages between the brain and the body.

Sensory or efferent neurons carry the information from the perimeter of the body and pass to the central nervous system whereas the motor or efferent neurons act as a communication channel and carry the information from the nervous system to various glands and muscles.

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4 years ago
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In which part of the digestion of protein begin​
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\Huge{\fbox{\red{Answer:}}}

The digestion of protein begins at mouth and it continues at stomach and small intestine.

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7 0
3 years ago
Which of the following samples will have the greatest volume at STP?a. 22 g Neb. 22 g Hec. 22 g O2d. 22 g Cl2 e. All have the sa
sammy [17]

Answer:

22g of He

Explanation:

Volume of gas at STP is given as :

Volume occupied(dm³) = number of moles x 22.4dm³mol⁻¹

In order to solve this given problem, we would first find the number of moles from the different masses of atoms and molecules given.

Number of moles = \frac{mass }{Molar mass}

Now, let us obtain the molar mass of the given atoms and elements:

For Ne; molar mass is the atomic mass = 20gmol⁻¹

      He = 4gmol⁻¹

      O₂ = (16 x2)gmol⁻¹  = 32gmol⁻¹

      Cl₂ = (35.5x2)gmol⁻¹ = 71gmol⁻¹

Number of moles of Ne = \frac{22}{20} = 1.1mol

Volume occupied by Ne at STP = 1.1 x 22.4 = 24.64dm³

       

Number of moles of He = \frac{22}{4} = 5.5mol

Volume occupied by He at STP = 5.5 x 22.4 = 123.2dm³

Number of moles of O₂ = \frac{22}{32}  = 0.688mol

Volume occupied by O₂ at STP = 0.688 x 22.4 = 15.4mol

Number of moles of Cl₂ = \frac{22}{71} = 0.3099mol

Volume occupied by Cl₂ at STP = 0.3099 x 22.4 = 6.94dm³

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A new moon is visible on Earth when the Sun, Moon and Earth are positioned so that the Moon - a is on the opposite side of Earth
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Answer:

d

Explanation:

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