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Step2247 [10]
3 years ago
12

The numbers represent the change in energy for a chemical reaction. They are calculated by subtracting the energy of products fr

om the energy of reactants. Which number would result from an endothermic reaction? -212 0 -1 800
Biology
1 answer:
Scorpion4ik [409]3 years ago
6 0

Answer:

800

Explanation:

its an endothermic reaction, to energy is being absorbed

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How has pliable whale bone been used over the centuries?
stira [4]

Answer:

Many of the baleen eyeglass frames seen in advanced collections probably date from the late 17th to the very early 19th century. ... Whalebone is easy to carve and shape since it has a pliable almost plastic-like property. As such it was used in various manufacturing industries as a forerunner of plastic.

Explanation:

hope this helps :)

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8 0
3 years ago
Parts of the earth that are utilized in the nitrogen cycle
miskamm [114]

Answer:

Atmosphere and geosphere is the part of the earth which is utilized in the nitrogen cycle.

Explanation:

In nitrogen cycle, the nitrogen which is present in the atmosphere comes down to the earth surface through rainfall. This nitrogen is absorbed by the earth and taken by roots of plants. Some amount of nitrogen is taken by many bacteria such as denitrifying bacteria which converts the soil nitrogen into atmospheric nitrogen and the nitrogen goes again to the atmosphere.

7 0
3 years ago
A patient has taken levodopa [Dopar] for Parkinson's disease for 2 weeks but reports no improvement in the symptoms. Which respo
Elan Coil [88]

Answer:

Option-D

Explanation:

Parkinson's diseases are a neural disorder which affects the movement of the human body. The disease is caused by the low production or no production of dopamine by the neurons which thus interfere with the impulse transfer and thus movement.

In the given question, the patient with Parkinson's disease is provided with levodopa but no improvement is observed therefore the prescriber must change the drug regimen, for example, the levodopa should be given in combination with carbidopa. These medications enter the blood-brain barrier and get converted to the dopamine.

Thus, Option-D is the correct answer.

8 0
3 years ago
Quaking aspen trees can send out underground stems for asexual reproduction. Sexual reproduction is not as common, but when it d
Doss [256]

Answer:

38

Explanation:

  • Sexual reproduction happens when there is the involvement of two parents to give rise to the offsprings.
  • For the production of offsprings, each of the parents produces a haploid gamete and it is by the fusion of these two haploid gametes that a diploid organism is produced.
  • In the given situation, there are 19 chromosomes present in the haploid gametes this means that a diploid individual will have 2X19 = 38 chromosomes.
  • Now the underground stem cells are not gametes but somatic cells and the somatic cells are diploid and hence, they will have 38 chromosomes.
3 0
3 years ago
There is a net gain of how many ATP molecules for each molecule of glucose processed to pyruvate via glycolysis:
Elina [12.6K]

Answer:

2

Explanation:

Glycolysis or EMP pathway is first stage of cellular respiration that occur in the cytoplasm of every living cell. It is a common process of both anaerobic and aerobic respiration. During glycolysis glucose, a 6 carbon sugar is converted into two molecules of pyruvate, a three carbon sugar. During this conversion 4 ATP molecules are produced. Two oxidise glucose to pyruvate, 2 ATP molecules are also required or used up. Thus, a net gain of 2 ATP molecules at the completion of glycolysis.

3 0
3 years ago
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