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Luden [163]
3 years ago
15

An electric nerve impulse that travels through a neuron when some "trigger" changes the neuron's charge from negative to positiv

e is a(n)___________.
Biology
1 answer:
svet-max [94.6K]3 years ago
7 0

Answer:

action potential

Explanation:

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Describe the main molecule found in nucleus and explain how it controls the cells functioning​
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The main molecule found in nucleus is called DNA(deoxyribonucleic acid). This molecule is made of subunits called nucleotides. A nucleotide is made of a nitrogenous base that can be adenine, thymine, guanine or cytosine; a five carbon sugar called deoxyribose and a phosphate group. This molecule controns protein synthesis. Proteins are crucial to the cell's function.

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The conchae __________.
Bad White [126]
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At the molecular level, gene duplication often produces novelty in a lineage. This process provides another evolutionary pathway
alukav5142 [94]

Answer:

Bridgham et al. (2006) showed that the interaction between a steroid hormone (aldosterone-M) and its receptor (mineralocorticoid) evolved by Darwinian gradualism. In this work, the authors demonstrated  a primitive affinity between the hormone and its receptor that was initially present in chemically similar but more ancient ligands. This result has implications in understanding the association between gene duplication and the evolution of hormone signaling pathways. For example, in invertebrates, this work reinforces the importance of gene duplication in the existing interaction between paralogous glucocorticoid receptors and their receptor mineralocorticoid genes that were derived from duplication (Thornton 2001).

The publications above cited are the following:

J.T. Bridgham, S.M. Carroll, and J.W. Thornton (2006). Evolution of hormone-receptor complexity by molecular exploitation. Science, 312(5770), 97-101.

JW Thornton. Evolution of vertebrate steroid receptors from an ancestral estrogen receptor by ligand exploitation and serial genome expansions, Proc Natl Acad Sci USA (PNAS), 2001, vol. 98 10 (pg. 5671-5676).

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3 years ago
When the ovule is fertilized what will the ovary turn into?
svetoff [14.1K]
The fruit I think

Hope this helps :))
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How do enzymes lower the activation energy?​
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By manipulating the substrates of the reaction, the enzyme can lower the necessary energy needed to make the reaction occur.

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