The deccan traps in ______ happened at the same time as the cretaceous mass extinction.

Biology

1 answer:

Anon25 [30]3 years ago

5 0

The deccan traps in Jurassic times happened at the same time as the cretaceous mass extinction.

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How can oxygen be both an element and a molecule

fgiga [73]

Answer:

Oxygen in the atmosphere is a molecule because it contains molecular bonds. It is an element because it is made from atoms of only one element - oxygen.

Explanation:

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3 years ago

Poor measurement practices are likely to lead to data that are

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Cell biologists studying the mobility of plasma membrane proteins fused mouse and human cells together, creating a heterokaryon.

m_a_m_a [10]

Answer: Fluorescence microscopy

Explanation:

A protein is substance that is the essential constituent of living cells because it forms part of its structure. They are also found in plasma membrane, where they assist substances to cross the membrane. Proteins can be:

Integral: permanently attached within the plasma membrane.
Transmembrane: it spans the entirety of the cell membrane.
Peripheral: are only temporarily associated to the membrane.

Some integral proteins can act as cellular receptors. Other proteins are responsible for cell adhesion (binding of a cell to another cell or to a surface). On the outside of the cell membranes, attached to other proteins, are the carbohydrate chains that act as labels identifying the type of cell.

A heterokaryon is a multinucleate cell and in this experiment the scientists fuse a human cell and a mouse cell, each of them will have their own proteins. At first, the human and mouse proteins where found in separated halves of this heterokaryon. But after a while, those proteins where mixed and could no longer be identified.

A fluorescent chemical called a fluorophore is able to be absorb light of specific wavelengths and then emit light of longer wavelengths. The proteins can be modified and marked with different colored fluorophores to detect them, even if they are mixed in the heterokaryon. Then, they can be seen with a Fluorescence microscopy, to identify them through different colors.

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3 years ago

In a food weh, which type of organism receives energy from the other three types?

Karolina [17]

Answer:

decomposers receive energy from the other three types

Explanation:

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2 years ago

Which of the following ions is a polyatomic ion?

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The correct answer is option $NH{{+} \atop {4}} \right.$ .

The $NH{{+} \atop {4}} \right.$ is an ion made up of two atoms nitrogen and hydrogen.

The polyatomic ions are those ions, which are formed by the binding of the two or more elements, which has a charge and act as an ion. As all others are formed by a single atom, they are not polyatomic, only $NH{{+} \atop {4}} \right.$ is formed by two atoms, hence, it is an polyatomic ion.

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3 years ago