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3 years ago

Which of the following best describes an atom

Biology

2 answers:

Natali [406]3 years ago

6 0

The correct answer is option C, that is, a core of protons and neutrons surrounded by electrons.

An atom refers to the smallest component unit of usual matter, which exhibits the characteristics of a chemical element. Each of the liquid, solid, plasma, and gas comprises of ionized or neutral atoms. Each atom comprises of the nucleus and one or more electrons enclosing the nucleus. The nucleus comprises one or more protons and usually an identical number of neutrons.

Angelina_Jolie [31]3 years ago

5 0

C. your core will be made of protons will be made of protons and neutrons while being surrounded by "shells" of electrons.

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What part of the cell increases as the cell becomes smaller?

Nata [24]

Answer:

Surface area

Explanation:

The surface area to the volume ratio gets larger as the cell gets smaller and vice versa.

8 0

2 years ago

Can you identify the class of organic molecule to which these molecular structures and examples belong? Part A Sort these items

sattari [20]

There are four classes of organic molecules that are essential to all living organisms.

1. Carbohydrates:

Components: monosaccharides. Functions: energy for cell, raw material, energy storage, and plant cell support Ex: glucose, starch, glycogen, cellulose

2. Lipids (dont form polymers): Components: glycerol, fatty acid, components of a fat molecule Functions: energy storage, cell membrane components, and hormones Ex: fats, phospholipids, and steroids

3. Proteins:

Components: amino group, carboxil group, R group, and amino acid Function: enzyme, structural protein, movement, transport, communication, defense, storage, receive signals Ex: lactose, hair, tendons, muscles, hemoglobin, signal proteins, antibodies, egg albumin, receptor protein

4. Nucleic acids:

Components: phosphate group, nitrogeneous base, ribose or deoxyribose, nucleotide Functions: heredity, DNA

Ex: code for proteins, DNA and RNA

5 0

3 years ago

Mention about the four events of a occur during a binary fission in amoeba

Dafna1 [17]

Answer

The 4 events that occur during amoeba are:-

It sees the food particle.Then by pseudopodia (the finger like projections from amoeba) traps the food particle.
The finger-like extensions of the cell surface fuse over the food particle forming a food vacuole.
Inside the food vacuole, complex foods are broken down into simpler ones which then diffuse into the cytoplasm.
The remaining undigested material is moved to the surface of the cell and thrown out. [Egestion].

7 0

3 years ago

All cells of the body age and are replaced in a natural order. When RBCs age, they are destroyed in the spleen. During this proc

Ad libitum [116K]

Answer:

Bone marrow.

Explanation:

Hematopiesis may be defined as the formation of the blood cells by the precursor stem cells. This process occurs in the bone marrow, thymus and liver.

The red blood cells are enucleated cells with the minimum span of around 120 days. These cells are processed and destroyed in the spleen. The iron is recovered from the red blood cells and sent again into the bone marrow for the production of new blood cells.

Thus, the answer is bone marrow.

4 0

3 years ago

Which term describes cycles of hot and cold temperatures which expand and contract rock in combination with constant wind and wa

marishachu [46]

The correct answer is option C, that is, physical weathering.

The weathering resulting due to the influences of changing temperatures on a rock, making the rock to split apart is known as physical weathering. There are two main kinds of physical weathering, that is, exfoliation and freeze-thaw.

Physical weathering takes place mainly in the locations, where few plants grow and little formation of soil occurs, like hot deserts and mountain regions. It takes place either via repeated freezing and melting of water or via contraction and expansion of the rocks surface layer, which is baked by the sun.

4 0

3 years ago

Read 2 more answers