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zmey [24]
3 years ago
12

What's the answer to this question

Biology
1 answer:
Flauer [41]3 years ago
7 0
The answer is C. Thermal energy is transferred to her face by radiation, and thermal energy is transferred to the bottoms of her feet by conduction. 

Conduction is a method of transferring heat by using the collision of molecules and free electrons (depending on the material). Heat is usually transferred by conduction if both objects are in contact with each other that way the molecules can collide and spread the kinetic energy thus raising their internal heat. So, since the feet and the sand are in contact, so the heat should be transferred by conduction. However, air is a very poor heat conductor, it cannot transfer heat efficiently, therefore, the first answer is not conduction. 

Radiation is a method of transferring heat too but using electromagnetic waves. It works great even in the air, or even with vacuum space. The sun shining from outer space to earth through the vacuum space is also by radiation. So, the first answer is radiation. 

The answer is C, hope it helps!
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A diploid somatic ("body") cell has 2n=20 chromosomes. At the end of mitosis, each daughter cell would have ______ chromosomes.
Nostrana [21]

Answer:

1. 20 chromosomes

2. 10 chromosomes

3. 10 chromosomes

Explanation:

1. The process of mitosis results in the two daughter cells from the same parental cell with exactly the same genetic material. Thus the two cells contain the same number of chromosomes as the parent cell. Therefore if a cell with 20 chromosomes undergoes mitosis will result in the 20 chromosomes.

2. During meiosis I two daughter cells are formed with different ploidy levels as the number of the chromosome reduces to half. Therefore the cell with 20 chromosomes results in two cells with 10 chromosomes.

3. During meiosis II, the two daughter cells formed from meiosis I result in the formation of two more daughter cells with an exact number of chromosome number that is 10 chromosomes.

7 0
3 years ago
Why will these changes make it more difficult for the plants to grow
frutty [35]

Explanation:

In contrast to a popular conservative argument, a new study has found that increased atmospheric carbon dioxide isn’t necessarily a boon to plant growth — instead, it causes plants to have a more difficult time absorbing nitrogen, a nutrient critical to plant growth and health.

Published in the journal Global Change Biology, the study found that as carbon dioxide levels in the air increase, the concentration of nitrogen in plants decreases, thus decreasing the plant’s protein levels and growth ability. The team of international researchers studied the impact of increased atmospheric carbon across multiple types of ecosystems — from grasslands for forests — by looking at large-scale field experiments conducted in eight countries across four different continents.

“For all types of ecosystem the results show that high carbon dioxide levels can impede plants’ ability to absorb nitrogen and that this negative effect is partly why raised carbon dioxide has a marginal or non-existent effect on growth in many ecosystems,” Johan Wedding, senior lecturer at the Department of Biological and Environmental Sciences at the University of Gothenburg and lead researcher on the project, said in a press statement.

Among conservatives — and some scientists — there has been a long-held hope that climate change could actually stimulate plant growth in the short term, as the atmosphere becomes richer with carbon dioxide. Sen. James Inhofe (R-OK) has said that climate change has “contributed to increasing agricultural productivity,” arguing that “CO2 is a fertilizer.” And while some studies have supported Inhofe’s claim, others — like this most recent one — have found the opposite to be true.

“The findings of the study are unequivocal. The nitrogen content in the crops is reduced in atmospheres with raised carbon dioxide levels in all three ecosystem types. Furthermore, we can see that this negative effect exists regardless of whether or not the plants’ growth increases, and even if fertilizer is added. This is unexpected and new,” Wedding said.

The study found that for both wheat and rice, increased carbon dioxide in the atmosphere led to less nutritious crops. Wheat and rice are two of the most important crops globally — alongside maize, wheat and rice provide over 50 percent of the world’s plant-derived energy, according to the International Development Research Center.

Past studies have also seen reductions in nitrogen content for plants grown in a high-carbon environment, but have traditionally attributed it to a kind of dilution — the idea being that as carbon stimulates plant growth and the rate of photosynthesis increases, nitrogen uptake simply wasn’t able to keep up. That theory, Wedding said, has now been called into question.

“The findings of this study show that this interpretation is simplified and partly incorrect. We are seeing reduced nitrogen content even when growth has not been affected. Moreover, the effect is there in trials with powerful fertilizer, which indicates that it is not down to limited access to nitrogen in the soil,” Wedding said. “Future studies should look at what is causing the effect, but it appears to be linked to plants’ capacity to absorb nitrogen rather than to changed levels in the soil

3 0
3 years ago
Read 2 more answers
Which of the following is not a characteristic of all living organisms? A)energy utilization B)complex yet organized C)capable o
muminat

<em>Lets take a look at all the choices:</em>

A) Energy utilization

All organisms require energy to survive. That question is out for sure!

B) Complex Yet Organized

All living organisms are complex, and if they weren't organized, well, they wouldn't exist or they would have some serious problems!

C) Capable of Self-Reproduction

Simple: Not all organisms are able to reproduce asexually, for example, humans. We do not reproduce asexually. Therefore it is not a characteristic of <u>ALL</u> living organisms

D) Composed of Multiple Cells

No-brainer! All living organisms are composed of multiple cells!!!!!!!!!!!!


Therefore, the answer is C) Capable of Self-Reproduction  


5 0
3 years ago
IQ tests are said to have "reifled" intelligence; this means that IQ tests
Stolb23 [73]

Answer:

a. are a valid way to measure a person's inborn intelligence

Explanation:

IQ testing is an important tool for measuring an individual's innate intellectual abilities, as long as its content is not limited to just one area of knowledge. Cognitive ability is related to hereditary and cultural characteristics that can be inherited or developed throughout life. Over the years, experts have developed techniques for measuring individual intellect.

The tool is used to obtain an intelligence indicator for different purposes. Following the original idea of the test, its application may be necessary to identify children with attention deficit or who are in a more advanced learning process than other students.

The IQ test is also used to diagnose issues related to an individual's behavior and conduct, and to support a job selection process.

8 0
3 years ago
What was Griffith’s explanation for the experiment’s results
Serjik [45]

Answer:

Griffith concluded that the R-strain bacteria must have taken up what he called a "transforming principle" from the heat-killed S bacteria, which allowed them to "transform" into smooth-coated bacteria and become virulent.

Explanation:

5 0
3 years ago
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