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DerKrebs [107]
1 year ago
10

Which of these best describes the tiny leg bones that some whales have, which do not aid in their movement or serve any other fu

nction?
O structures that grow and improve in function as they are used
O structures that function at certain times of the year or under certain conditions
O structures that will become adaptations when the environment changes
O structures that have lost all or most of their function over evolutionary time
Biology
1 answer:
Ainat [17]1 year ago
6 0

Answer:

D. structures that have lost all or most of their function over evolutionary time

Explanation:

the question states that the leg bones are almost entirely unused because of evolution

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In a certain plant, yellow leaves are dominant (Y) and red leaves are recessive (y). A plant with genotype Yy and a plant with Y
agasfer [191]
<span>Based on a simple Punnett square, you could predict that one of the offspring (with the genotype yy) would present with red leaves. The other three offspring would present the phenotype of the yellow leaves, because the dominant gene (Y) is present (genetypes Yy, yY, and YY).</span>
6 0
1 year ago
What feature of both true mosses and ferns makes it most surprising that they can survive for many generations in dry deserts? U
FromTheMoon [43]

Answer:

The correct answer will be option-A

Explanation:

Desert biomes are characterised by the presence of the arid conditions or with few or less amount of rainfall.

The plant groups called the bryophytes and pteridophytes are dependent on the water for their fertilization which allows completing their life cycle.

In the desert conditions provided in the question, the mosses and ferns survived for many generations as these plant groups produced sperms with flagella which helped the sperms to swim in the water provided by the 10-inch rainfall per year and reach the female gamete and fertilize the egg cell.

Thus, option-A is the correct answer.

6 0
1 year ago
You visit a huge city with millions of people. If you were to start sampling the cystic fibrosis allele from one generation to t
lys-0071 [83]

Answer:

The frequency would be stable.

Explanation:

Based on the most common symptoms of cystic fibrosis, the disease only appears on adults and elderly. This feature means that the frequency of the disease would not drop or raise because they would still reproduce and pass the allele from generation to the next, maintaining the frequency stable.    

6 0
2 years ago
You want to test which size of soccer (football) ball is easiest to juggle with your feet. You test a size 3, size 4 and a size
Semenov [28]

Answer:

<u>independent variable:</u> size of soccer ball

<u>dependent variable</u>: period of time the balls stay in the air

<u>control variable</u>: parts of the body used to juggle the ball

Explanation:

The independent variable is the manipulatable variable supplied into an experiment. It is a variable that directly affects the dependent variable.

The independent variable is the outcome variable. It is the variable that is primarily measured from experiments whose value depends on the value of the independent variable.

The control variables are those that are kept constant throughout the course of experiments. In other words, they do not directly affect experimental outcomes.

Hence, in the illustration;

<u>independent variable</u>: size of soccer ball

<u>dependent variable</u>: period of time the balls stay in the air

<u>control variable</u>: parts of the body used to juggle the ball

4 0
2 years ago
Which two statements about first-person narration are generally true? The narrator can be a witness or a reteller of events. The
nirvana33 [79]

Answer: The narrator can be a witness or a reteller of events.

Explanation:

A first-person narration is a way of storytelling in which the storyteller narrates the first hand experiences. The narrator recollects or recounts the events specific for  a story through own point of view introducing oneself as first person. The narrator might have witnessed of all the events had taken place in past before telling the story.

7 0
1 year ago
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