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3 years ago

Which statement best explains why the atmosphere is considered an open system?

Biology

2 answers:

solong [7]3 years ago

7 0

the answer is b. energy and matter can enter and leave.

Reil [10]3 years ago

5 0

Answer:

B. Energy and matter can enter and leave

Explanation:

An open system is one that can exchange matter and energy with its surroundings.

The atmosphere is the layer of gas that is surrounding a celestial body, it has properties that are related to its chemical composition and physical state. To maintain its properties, external processes and interactions are required that help maintain or alter its characteristics. Among these processes we can highlight the temperature, pressure and movement. These processes, in which exchanges occur, are what make the atmosphere not a closed system.

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In a study of genetic variation of the Graceland gene, a researcher finds that there are two alleles in a population. In a large

Licemer1 [7]

Answer:

Option 1, No. The highest frequency of heterozygotes under Hardy-Weinberg equilibrium is 0.5

Explanation:

As per Hardy Weinberg’s equilibrium principle, the maximum frequency of heterozytotic individuals occur only when half of the population is dominant and recessive homozygous.

In other way when the sum of frequency of dominant and recessive species is equal to 0.5, only then the frequency of heterozygotes is maximum which in any case would not be higher than 0.5.

Hence, option 1 is correct

7 0

3 years ago

What are the parts of phospholipid molecule?

ki77a [65]

Hydrophilic heads, hyrdophobic tails. Heads are made of phosphate and the tails are made of lipids.

8 0

2 years ago

Read 2 more answers

Many researchers think that the first eukaryotic cells obtained energy for life-sustaining functions from organic compounds. Giv

astra-53 [7]

Answer: Chloroplast

Explanation:

The presence of chloroplast would have been the last organelle which appeared in the eukaryotic cell. Chloroplast helps in photosynthesis which means prepare food from the inorganic compounds.

But here the cell obtains energy from the organic compounds which states that there is no need of chloroplast in the cell as they obtain energy by hetero tropic mode of nutrition.

Hence, chloroplast is the correct answer.

5 0

3 years ago

PLEASE NO LINKS

Annette [7]

Considering the definition of probability, the correct answer is third option: the approximate probability of a moth being brown and yellow respectively is 33% and 21%

Probability is the greater or lesser possibility of a certain event occurring.

In other words, probability establishes a relationship between the number of favorable events and the total number of possible events.

Then, the probability of any event A is defined as the quotient between the number of favorable cases (number of cases in which event A may or may not occur) and the total number of possible cases. This is called Laplace's Law.

$P(A)=\frac{number of favorable cases}{total number of possible cases}$

In this case, you know that in a moth population, 48 are brown, 30 are yellow, and 67 are black. So, the total number of possible cases is calculated as:

total number of possible cases= 48 + 30 + 67= 145

The number of favorable cases for a moth to be brown is: 48

Then the probability that a moth is brown is calculated as:

$P(A)=\frac{48}{145}$ = 0.33= 33%

On the other side, the number of favorable cases for a moth to be yellow is: 30

Then the probability that a moth is yellow is calculated as:

$P(A)=\frac{30}{145}$ = 0.21= 21%

In summary, the correct answer is third option: the approximate probability of a moth being brown and yellow respectively is 33% and 21%

Learn more about probability:

brainly.com/question/23297275?referrer=searchResults

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2 years ago

After sunlight hits photosystem II, which is the best description of what happens?

erastova [34]

Answer:

D glucose is formed from carbon dioxide

5 0

3 years ago