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Vlad1618 [11]
3 years ago
5

An object with a kinetic energy of 200 J and Potential energy of 300 J, has a mechanical energy of what?

Biology
1 answer:
True [87]3 years ago
4 0

Answer:

500 J

Explanation:

Emechanical=U+K,i.e., the mechanical energy Emechanical is the sum of the potential energy U and kinetic energy K.

So, the object has a mechanical energy of 200+300=500 J.

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natita [175]

Answer:

1) genetics

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3) easy to grow, can be shown year, used for similar studies

4) we are the parents produce offspring that would carry the same phenotype

5) he removed the anthers from the flowers

6) a trait or character is a feature of an organism.

7) the basic physical and functional unit of heredity

8) one of the possible forms of a gene

9) the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction.

10) “P” for parental generation.

11) F1 generation refers to the first filial generation

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6 0
3 years ago
How many things are in a plant cell​
Kipish [7]

Answer:

40 Trillion.

Explanation:

About 40 trillion!

4 0
2 years ago
Read 2 more answers
The DNA sugar phosphate structure carries an overall negative charge due to the pKa of one of the phosphate groups being much le
vodomira [7]

Answer:

B. positive

Explanation:

Histones are proteins that bind to the DNA in order to form highly compacted structures named nucleosomes, the basic structural units of DNA packaging in eukaryotic genomes. A nucleosome is a segment of DNA wound around an octamer (8) of histones, i.e., two copies each of the histones H2A, H2B, H3, and H4. These histones are positively charged in order to interact with the negatively charged DNA molecule. During transcription, reducing histone positive charge decreases the interaction between DNA and histones in the nucleosomes, thereby opening the chromatin to favor the access of the transcriptional complex and thus facilitates gene expression.

5 0
3 years ago
Which 3 of the following are examples of feedback mechanisms which helps maintain homeostasis?
kari74 [83]

Answer: The correct answer is-

C. Insulin secretion in response to high blood sugar.

D. Increased heart rate in response to exercise.

F. Proton pumping to maintain a proper pH level.

Homeostasis can be described as a tendency of living organisms to maintain a state of stable internal environment. In other words, it is the tendency to resist any change in the optimal conditions for survival.

It is brought by several regulatory mechanisms in the body such as regulation of body temperature, regulation of pH, regulation of osmolarity etc.

  • Whenever there is high blood sugar level, insulin hormone is secreted from pancreas that reduces the blood sugar level.
  • Heart rate is increased in response to exercise so that more oxygen is transported through blood circulation and more amount of energy is harvested through cellular respiration in the form of ATP ( required in exercise).
  • Pumping of proton maintains a proper pH level ( such as in lysosomes, where pH is highly acidic, high proton concentration is regulated through proton pumping).

Thus, option C), D), and F) are the examples of feedback mechanisms  that help in maintaining homeostasis.


7 0
3 years ago
Select the right coronary artery. This artery and its branches supply blood to the right ventricle and the right atrium. It exte
Bogdan [553]

This artery and its branches supply blood to the right ventricle and the right atrium. It extends from the <u>right anterior aortic sinus</u> and runs to the right of the <u>coronary sulcus</u>.

The right coronary artery components the right atrium, the right ventricle, the posterior one-1/3 of the interventricular septum, and the inferior portion of the septum.

right coronary artery (RCA). The right coronary artery components blood to the proper ventricle, the right atrium, and the SA (sinoatrial) and AV (atrioventricular) nodes, which alter the coronary heart rhythm.

The proper coronary artery (RCA) is certainly one of the primary coronary vessels that deliver the myocardium (the other being the left coronary artery). It originates from the right aortic sinus of the ascending aorta and runs within the right part of the atrioventricular groove (coronary sulcus) wrapping across the right side of the coronary heart.

Learn more about coronary artery here brainly.com/question/14693643

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6 0
2 years ago
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