If a DNA molecule was a spiral staircase, what would the steps of the staircase be?​

Answers

Answer 1
Answer:

Answer:

Nitrogenous bases

Explanation:

DNA is a nucleic acid molecule that acts as the genetic material of the organisms. The structure of DNA is made of two strands of nucleotides that are linked together and form a helical structure. The helical structure is known as the double-helical model with a ladder-like appearance.

The backbone of the ladder is composed of the sugar and phosphate groups at alternate positions whereas the staircase of the ladder are made of the different type of nitrogenous bases (A, G, T, C)  joined by the hydrogen bond.

Thus, Nitrogenous bases is the correct answer.


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Suppose that the genetic map distance from A to B is 8 map units, from B to C is 10 map units and from A to C is 2 map unit. A true-breeding wild type parent was crossed with a true breeding mutant parent. A three-point testcross has been performed using an F1 heterozygote, and 1000 progeny were obtained. How many of the test-cross progeny do you expect to be double crossover?

Answers

Answer:

This question includes the following options to choose from:

A) 2     B) 12     C) 8     D) 9     E) 10  

3 point testcrosses focus on analyzing the inheritance blueprints of alleles by crossing triple heterozygotes with triple recessive homozygotes, allowing therefore to find out the distance between the alleles, and also their location order on the chromosome.

And it all comes down to the frequency of recombination, in this case such frequency between C&A is 0.02, in the same fashion that it's 0.08 between A&B; thereby the answer is A). 2

What was an unintended negative environmental consequence of improved technology in agriculture?A. Farmers went bankrupt purchasing expensive equipment.
B. Modern technology allowed for larger expanses of land to become cultivated, so farming took over many natural areas that were important for wildlife
C. Machines took away jobs commonly performed by farm workers
D. Machines diminished the quality of the crops.​

Answers

The correct answer is B. Modern technology allowed for larger expanses of land to become cultivated, so farming took over many natural areas that were important for wildlife.

Explanation:

In the last decades, the creation of agricultural technology has increased the efficiency of growing crops. This means now, all the process is more efficient, which leads to more products to be sold and an increase in profit. However, the possibility of large scale agriculture has caused more land is used for this purpose. This often implies natural ecosystems such as forests are destroyed and the land of these ecosystems, which is usually rich in minerals, is used for extensive agriculture. This is a negative consequence of agricultural technology as natural areas important for wildlife are taken for human profit.

Answer:

B

Explanation:

Penn Foster

Genral Science

Page 14

5 a.
Describe the disease malaria and its precautions​

Answers

Answer:

Malaria is a parasite transmitted by mosquitoes that invades the red blood cells, creating fevers, chills & sweating after a couple weeks of being bit.

Explanation:

Precautions you can take to avoid this would be to apply insect repellent on clothing/skin, using a mosquito net & spraying pyrethrin or other insecticides in your room before heading to bed.

Which change to the ramp would be the best way to increase its medical efficiency (ME), and why?

Answers

Answer:

make it lower

Explanation:

because then it would be easier to maneuver

Why are emperor penguins considered a species?

help please

Answers

Answer:

there are diffrent type of emperor penguins so they are considered a species

Explanation:

What’s a everyday object that acts like a animal cell?

Answers

Answer:

Screen door

Explanation:

Because it holds things out but let air in.

Final answer:

A plastic bag is an everyday object that behaves like an animal cell. The bag itself represents the plasma membrane of a cell, while the items inside the bag represent the different organelles, each with its distinct function.

Explanation:

An everyday object that acts like an animal cell could be a plastic bag. Let me explain why. The plastic bag acts like the plasma membrane, which is the outer lining of an animal cell. It holds everything inside, much like the way a plastic bag holds whatever you put into it. Then, you have your belongings inside the bag resembling the organelles, the functional components of an animal cell. Each item in the bag has a different purpose, similar to how each organelle in a cell has a unique function.

Learn more about Animal Cell Analogy here:

brainly.com/question/36271067

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