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Volgvan
3 years ago
9

(select all that apply.) the four organic molecules common to organisms are _____.

Biology
1 answer:
harkovskaia [24]3 years ago
6 0
<span>In order to sustain life, all organisms must contain the following organic molecules; proteins, nucleic acids, carbohydrates and Lipids.</span>
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The most plentiful gas in the atmosphere is …
frosja888 [35]

Answer:

By far, the most abundant gas in the Earth's atmosphere is nitrogen, which accounts for about 78% of the mass of dry air.

Explanation:

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2 years ago
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Explain how the woolly lousewort has adapted to the cold climate of the tundra?
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<span>The woolly lousewort has dense hairs that surround its flowers. These hairs trap the heat from the sun and allow its temperature to be maintined, keeping the flower at a warm enough temperature for it to germinate its seeds.

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3 years ago
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Iven the equation representing a nuclear reaction in which x represents a nuclide: which nuclide is represented by x?
kaheart [24]

The nuclide represented as X is thorium and this is an alpha decay where an alpha particle is removed off.

<h3>What is nuclide?</h3>

A kind of atom or nucleus which is represented by a specific number of protons and neutrons.

The equation given represents an alpha decay. In an alpha decay, an alpha particle is removed off.

The atomic number of the parent nuclide is more than the daughter nuclide by two units and the mass number of the parent is more than that of the daughter nuclide by four units.

Thus, the x is thorium.

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8 0
2 years ago
How does cell differentiation contribute to the formation of new, different types of skin cells?
ch4aika [34]

During cell differentiation, new proteins are expressed

During cell differentiation, some genes are silenced while some or expressed. Different cells differentiate differently depending on the type of cell is going to become. This is why even though all the cells in a multcellular organism have the same DNA, they become different organ systems that look different.

Explanation:

Different differentiated cells produce different proteins because they express different genes. For example Cells of the epidermis of the skin express the genes for producing keratin (the pigment molecule) while those in the dermis do not express this protein because this gene is silenced in dermis cells. In  addition, in dark-skinned people, these genes are more expressed that in people with light skin.

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3 years ago
How many photosystems are there in photosynthesis?
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Answer:

2

Explanation:

There are two kinds of photosystems: photosystem I (PSI) and photosystem II (PSII) (Fig. 3.3).

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2 years ago
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