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kykrilka [37]
3 years ago
10

Which best describes the nucleus of an atom?

Biology
2 answers:
Viefleur [7K]3 years ago
7 0

Answer: C. it is the part of the atom with the greatest mass

Explanation: APEX ANSWER

Maru [420]3 years ago
4 0

Answer;

C. it is the part f the atom with the greatest mass

Explanation;

The nucleus of an atom is a small dense region at the center of an atom that contains protons and neutrons.

Almost all the mass of an atom is located in the nucleus, with a very small contribution from the electron shells.

The protons are positively charged which gives the nucleus a positive charge while the neutrons have no charge.

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Select the correct statement about the three-chambered hearts of amphibians and nonbird reptiles. A scheme of blood circulation
Soloha48 [4]

Answer:

The three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart.

Explanation:

In Anatomy, cardiac cycle can be defined as a complete heartbeat of the human heart which comprises of sequential alternating contraction and relaxation of the atria and ventricles, therefore causing blood to flow unidirectionally (one direction) throughout the human body.

Generally, the cardiac cycle occurs in two (2) stages;

I. Diastole : in this stage, the ventricles is relaxed and would be filled with blood.

II. Systole: at this stage, the muscles contracts and thus, allow blood to be pushed through the atria.

All amphibians and reptiles except for crocodiles (having four-chambered heart) have three-chambered hearts, which typically comprises of a partially divided ventricle and two atria.

Hence, the correct statement about the three-chambered hearts of amphibians and nonbird reptiles is that, the three-chambered hearts of amphibians and nonbird reptiles are facultative, allowing variation in blood flow through the heart due to the partially divided ventricle.

7 0
2 years ago
Describe DNA replication. Include all relevant aspects. When does this process occur? and why
ASHA 777 [7]
Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. ... To accomplish this, each strand of existing DNA acts as a template for replication.
3 0
3 years ago
What researches are considered basic science
Leviafan [203]

Answer:

pure research or fundamental research which is a type of reach with the idea of improving scientific theories. :)

4 0
3 years ago
Can someone help with the labels for this ?
JulsSmile [24]

Answer:

Refer to the attached image for correct labeling.

Explanation:

  • The diagram is of a plant cell and its organelles.
  • The nucleus houses the genetic material and controls all life processes.
  • A plant cell contains one large vacuole in the center that stores water and nutrients.
  • Chloroplast is the site for photosynthesis. It captures light and utilizes it and carbondioxide to produce glucose.
  • Mitochondria are called the power house of the cell. Through a process called cellular respiration, they break down the glucose produced in photosynthesis into energy compounds such as ATP as well as oxygen and water.
  • The endoplasmic reticulum is the site for protein sysnthesis. It contains two parts: the rough endoplasmic reticulum (RER) which contains ribosomes that synthesize proteins and the smooth endoplasmic reticulum (SER) which packages the proteins into transport vesicles.
  • The nucleus contains the nucleolus that is the site for ribosome assembly.
  • The cell membrane is a semi-permeable membrane that covers the cell and controls cellular transport.
  • The cell wall is a hard, outer covering that protects the cell and maintains its structure and shape.

6 0
3 years ago
Questions 1 Compare the direction of the currents in the North Pacific Ocean with those of the South Pacific Ocean How are they
serg [7]

Answer:lol

Explanation:

4 0
3 years ago
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