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3 years ago

Which type of cells have a high concentration of mitochondria?

Biology

2 answers:

Alborosie3 years ago

8 0

Hmm that’s a good question

frutty [35]3 years ago

6 0

Answer:

nerve cells (a)

Explanation:

it is muscle cells but nerves and muscles go hand in hand

Hope this helped!

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Please help ASAP! Describe at least one way in which each of Earth’s subsystems was altered during the Precambrian era.

trasher [3.6K]

The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.

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4 years ago

Read 2 more answers

The effect of cholesterol on membrane fluidity at physiological temperatures is to Choose one: A. prevent lateral movement of ph

kobusy [5.1K]

Answer:

The correct answer is D. maintain membrane fluidity through its disruption of fatty acid packing.

Explanation:

<u>Cholesterol</u> is a steroid lipid and is a constituent of biological membranes. It regulates the <em>fluidity</em> of the membrane (so, option C is not correct). Since cell membranes are composed of another type of lipids, the phospholipids, which form a bilayer, cholesterol distributes between the phospholipid tails and avoids these molecules pack each other forming rigid clusters. Thus, the option which better explains the effect is <em>D. maintain membrane fluidity through its disruption of fatty acid packing.</em>

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3 years ago

Animal cell map to understand how cells function as the fundamental unit of life, you must first become familiar with the indivi

kodGreya [7K]

Answer:

a-synthesizes lipids

b-assembles ribosomes

c-defines cell shape

d-produces secretory proteins

e-modifies and sorts proteins

f-digests proteins

g-generates ATP

Explanation;

Some organelles and structures that make up the cell include; mitochondria, ribososmes, cell membrane, endoplasmic reticulum, golgi apparatus, lysosomes, among others,

-These organelles play individual roles in the cell; For instance;

Mitochondria-generates ATP

Lysosomes; digests proteins and worn out organelles

Golgi apparatus; modifies and sorts proteins

Ribosomes; Produces proteins

Endoplasmic reticulum; sythesis of lipids

Cytoskeleton; it gives the cell its shape

Nucleolus; manufactures and assembles ribosomes

etc.

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3 years ago

1.research the hjulstrom diagram and provide a paragraph description in your own words.

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Explanation:

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3 years ago

Water has a __, so it takes a lot of energy to change from a liquid to a gas. This helps organisms maintain the amount of water

skelet666 [1.2K]

Answer:

high heat vaporization for the top one

Explanation:

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3 years ago