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4 years ago

URGENT PLEASE

Biology

2 answers:

____ [38]4 years ago

5 0

Answer:

Part A: Both the parents must be the carrier of the diseases that is, Cc.

Part B: one out of four or 25 percent chances are there that their offspring would have cystic fibrosis.

As cystic fibrosis is an autosomal recessive disorder, the individual needs to carry two copies of the recessive allele that is, homozygous recessive (cc).

It is stated that neither of the parents has the disorder but their offspring show the phenotype, then both the parents must be the carrier of the disorder that is, both must heterozygous (Cc).

The offspring produces by this cross can have three types of genotypes CC, Cc, cc in 1:2:1.

Thus, only one out of four would show the disease.

nirvana33 [79]4 years ago

3 0

A ) Because their parents are heterozygous recessive of cystic fibrosis.

B) there is a 25% chance that child produced by them has the disease !!

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What are the main types of rocks and how are they classified?(I need help!!!!)

KATRIN_1 [288]

Sedimentary

Sedimentary rocks are formed from particles of sand, shells, pebbles, and other fragments of material. Together, all these particles are called sediment. Gradually, the sediment accumulates in layers and over a long period of time hardens into rock. Generally, sedimentary rock is fairly soft and may break apart or crumble easily. You can often see sand, pebbles, or stones in the rock, and it is usually the only type that contains fossils.

Examples of this rock type include conglomerate and limestone.

Metamorphic

Metamorphic rocks are formed under the surface of the earth from the metamorphosis (change) that occurs due to intense heat and pressure (squeezing). The rocks that result from these processes often have ribbonlike layers and may have shiny crystals, formed by minerals growing slowly over time, on their surface.

Examples of this rock type include gneiss and marble.

Igneous

Igneous rocks are formed when magma (molten rock deep within the earth) cools and hardens. Sometimes the magma cools inside the earth, and other times it erupts onto the surface from volcanoes (in this case, it is called lava). When lava cools very quickly, no crystals form and the rock looks shiny and glasslike. Sometimes gas bubbles are trapped in the rock during the cooling process, leaving tiny holes and spaces in the rock.

hope this helps, please mark brainliest :)

3 0

3 years ago

A scientist wishes to test a new type of adhesive to connect two metals together. He tests his hypothesis that the new adhesive

Lana71 [14]

Answer and Explanation:

The scientific method is a research method used to produce knowledge. It consists of systematic observations, measures, experimentation, analysis, and verification of a hypothesis. It is based on two aspects: reproducibility (the capability of reproducing the experiment in any other place by any researcher) and refutability (susceptibility to be refused).

There are different steps to follow in a scientific method:

• Definition and problem statement. The question for which there is not an answer yet.

• Hypothesis formulation.

• Data collection and analysis. This step involves testing the observations.

• Results

• Verification of the hypothesis. This step involves the acceptance or rejection of the working hypothesis.

• Conclusions and Discussion.

In the exposed example:

Let us imagine that the scientist only wants to evaluate the performance of the new adhesive connecting only two previously determined metals: Metal A and metal B. Let us also assume that there is only one exhisting adhesive, apart from the new one that is being tested. Finally, we might also assume that he has already done bibliographic research to know better about the requirements for adhering metals and the properties of the adhesive material needed to do so. The problem might have been related to the need of getting a better adhesive.

Hypothesis: "the new adhesive works better than existing treatments"
Treatment: applying the adhesive to the two metals, sticking them together and seeing how long they stick

Data collection and analysis: He performs this test on his new adhesive, records the time
Results obtention and report

The scientist did not perform the experiment with the existing adhesive. The scientist did not compare the performance of the previously existing adhesive to the new one.

The scientist should have performed the experiment with two treatment groups:

Treatment Group one: applying the existing adhesive to the metals A and B, sticking them together and seeing how long they stick

Treatment Group two: applying the new adhesive to the metals A and B, sticking them together and seeing how long they stick

The scientist also should have repeated the treatment at least two or three times for each group.

Finally, the scientist should have compared results between the performance of the two adhesives before reporting them.

8 0

3 years ago

A group of researchers are monitoring the health of a salt marsh. They

Schach [20]

I’m guessing B because it’s talking about salt water marshes and salt water fish need salt water they could be measuring how Much salt is left for the fish

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3 years ago

Which is closely linked to short-term memory, is like a place for doing mental jobs and allows children and adults to manipulate

Verizon [17]

Answer:

A. Working memory

Explanation:

Working memory is a type of short-term memory that is associated with numerous basic processes and abilities, such as decision making and problem solving. It stores temporary information that will eventually be extremely useful for day-to-day activities such as learning and comprehending both spoken and written information.

However, short-term memory has a limit of information that we are able to store, also known as "limited capacity."

For instance, when we are having an argument with someone, we tend to come up with responses or answers but we have to wait until the other person finishes talking. While they are talking, we are paying attention to the person but we are also remembering our own argument.

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3 years ago

The aorta, which carries oxygen–rich blood from the heart to all parts of the body, is a part of which circulation pathway?. . A

expeople1 [14]

B. pulmonary circulation

This is the circulatory system that brings blood into the heart and pumped it out to the entire body through systems of branching out veins and arteries. The aorta is the primary artery, like a major river, which then flows the oxygenated blood out into smaller arteries and veins.

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3 years ago