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leva [86]
3 years ago
6

Which type of lens can be rotated to select different magnifications?

Biology
1 answer:
stich3 [128]3 years ago
4 0

Answer:

objective lenses

Explanation:

objective lenses with different magnifications, screwed into a circular "nosepiece" which may be rotated to select the required lens.

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What type of bonds form between the nitrogenous bases? Why are these bonds important?
Bond [772]

Answer:

The bonds that are formed between nitrogenous bases are Hydrogen Bond.

Explanation:

When a hydrogen atom interract with an electronegative atom such oxygen,fluorine hydrogen bond forms,

              A single hydrogen bond is weak noncovalent bond but collectively they exerts  very strong interraction.

            Hydrogen bonding occurs between complementary base pair .For exam An adenine base forms 2 hydrogen bonds with thymine base whereas guanine forms 3 hydrogen bonds with cytosine base.

             The hydrogen bonding between complementary is very much important to stabilize the structure of DNA .

6 0
3 years ago
An _________________ is a consumer that eats both plants and animals.
Rudik [331]

Answer: Omnivore

Explanation: A Carnivore eats meat, an Herbivore eats plants, and an Omnivore eats both

5 0
3 years ago
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Which process is most likely used to transport glucose into a muscle cell?
anyanavicka [17]

Answer:

Glucose Transport

Explanation:

Glucose Transport is a highly regulated process accomplished mostly by facilitated diffusion using carrier proteins to cross cell membranes.

<em>Hope this helped! if so, please mark as brainliest!</em>

8 0
3 years ago
How is the mass number calculated for an element? A. The difference between the mass and the protons B. There is no calculation.
Nana76 [90]

The best answer is D.

The mass number of an element is the sum of the number of protons and the number of neutrons. Protons and neutrons both weigh about one atomic mass unit or amu.

The nucleus of an atom is made up of protons and neutrons. Both these two types of particles are almost the same size.  Almost all the mass of an atom (99%) is in the nucleus. Atomic mass therefore is really a measure of the size of the nucleus.


3 0
3 years ago
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Because water is a polar molecule, it makes an excellent solvent for polar and compounds found within cells and tissues
taurus [48]
Because water is a polar molecule, it makes an excellent solvent for polar and ionic compounds found within cells and tissues. 
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