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Ede4ka [16]
3 years ago
7

The calcium that triggers muscle contraction is stored in synaptic vesicles. the motor neuron. the mitochondria. the endoplasmic

reticulum.
Biology
1 answer:
Galina-37 [17]3 years ago
8 0
The calcium that triggers muscle contraction is stored in synaptic vesicles called endoplastic reticulum. that is not the only function of  the endoplastic reticulum it is also a network of a membranous tubules within the cytoplasm of a eucryotic cell continuous with the nuclear membrane.
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Why do scientists consider many factors when assigning an organism to a species?
marusya05 [52]
The reason why is a few things, first, they have to make sure that the organism is related, and that they can see that. They don't wanna assign a bird as an insect on accident, so they do tests and then determine. Second, the more factors the better, if you consider all the species in the world, and what makes them different from eachother you would have a very long list. And that is it.
I hope this helps. If you need clarity or anything just ask.
8 0
3 years ago
Where do you find the DNA in our cells?
lidiya [134]

Answer:

Nucleus.

Explanation:

All DNA is stored in the nucleus of the cell (eukaryotes), unless it is a prokaryotic cell.

If it is a prokaryotic cell, the DNA/RNA floats in the cytoplasm.

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2 years ago
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3 years ago
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GrogVix [38]

The geologic features that help scientists to determine the relative ages of rocks by their positions include index fossils, intrusions, and cross-cutting relationships (Option d).

<h3>What does geological age mean?</h3>

The expression geological age refers to the relative age of a given rock and or fossil (i.e. a piece or trace of dead organism) in a geological time scale.

In conclusion, the geologic features that help scientists to determine the relative ages of rocks by their positions include index fossils, intrusions, and cross-cutting relationships (Option d).

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5 0
2 years ago
Some of the chemicals that make up living organism have only few structures (like DNA) other have many different structures (lik
elixir [45]

Answer:Proteins have many different functions, while DNA has limited functions.

Explanation:

Chemicals that make up the living organisms consists of more protein than DNA. This is because proteins have different functions while the function of DNA are limited. Excluding water and fat, the human body is made up almost entirely of protein. Most of the structural framework of the body such as bones, muscle, organs, skin and nails are made up of protein.

Protein are responsible to do most of the work in cells by acting as enzymes, hormones and carriers. Proteins are largely required for the structure, function, and regulation of the body's tissues and organs.

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