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3 years ago

What is the scientific method? is there just one universal scientific method? why or why not?

Biology

2 answers:

blondinia [14]3 years ago

8 0

Answer:

A system for conducting a scientific investigation

Explanation:

other answers indicate moral beliefs a single step or bias which is wrong

IgorLugansk [536]3 years ago

5 0

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation

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marishachu [46]

The answer would be D, the carbon-12 atom.

6 0

4 years ago

Read 2 more answers

Sequence the following events involved in skeletal muscle cell contraction.

Sedbober [7]

Muscle contraction occurs when a motor neuron sends a signal (Ach) to the muscle cell, depolarizing it, and triggering contraction. The correct option is A. 2,4,3,1,5.

<h3>How does muscle contraction occur?</h3>

Just before muscle contraction occurs, there is a sequence of events that involve motor neurons, neurotransmitters, and ion flow.

1) The central nervous system generates an action potential that travels to the muscle fiber activating the calcium channels.

2) Calcium triggers vesicle fusion to the presynaptic membrane releasing acetylcholine (Ach) into the synaptic space.

3) Once released, Ach moves forward to the postsynaptic membrane of the skeletal muscle fiber where it binds to its receptors causing ion channels to open.

4) Positively charged sodium ions cross the membrane to get into the muscle fiber (sarcoplasm) and potassium leaves the cell.

5) The difference in charges caused by these ion transport charges positively the muscle fiber membrane. It depolarizes.

6) The action potential enters the t-tubules depolarizing the inner portion of the muscle fiber. Contraction initiates.

The correct sequence is as follows,

2. impulse reaches axon's synaptic knob.

4. Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis.

3. Ach binds to receptors on the muscle cell membrane.

1. sodium channels open and sodium flows in.

5. If enough sodium moves in to the muscle cell, an impulse (action potential) develops.

The correct option is A. 2,4,3,1,5.

You can learn more about muscle contraction at

brainly.com/question/13640988

brainly.com/question/24936815

brainly.com/question/13521730

brainly.com/question/23874288

#SPJ1

8 0

2 years ago

Compare and contrast the TWO classes of "seeded "plants.

atroni [7]

Answer:

The seed plants are often divided arbitrarily into two groups: the gymnosperms and the angiosperms. The basis for this distinction is that angiosperms produce flowers, while the gymnosperms do not.

Explanation:

The seed plants are often divided arbitrarily into two groups: the gymnosperms and the angiosperms. The basis for this distinction is that angiosperms produce flowers, while the gymnosperms do not. This is poor form, since it defines the gymnosperms by the absence of a character, and not by any features that the organisms actually share. The gymnosperms do share a number of features, but, as should be obvious from the above cladogram, they are not more closely related to each other than to the angiosperms (Anthophyta). The features shared by gymnosperms were likely present in the early ancestors of the flowering plants as well. It should also be noted that the "progymnosperms" are represented by a box of a different color, in order to make it clear that they are not actually seed plants, but rather are included here because they are believed to be the closest relatives of the seed plants.

Systematics within the seed plants is poorly understood. Part of the problem is that most of the major groups have gone extinct, and several of the groups alive today consist primarily of plants with highly derived morphologies. The above cladogram is based largely on the work of Jim Doyle, a professor at UC Davis, and Michael Donoghue, currently at Harvard, and is therefore somewhat preliminary. It includes some questionable groupings not explicitly supported in their papers.

7 0

3 years ago

Some cancers are caused by mutations that stop certain proteins from working. The inactivation of what kind of protein could lea

SSSSS [86.1K]

Answer:

Some cancers are caused by mutations that stop certain proteins from working. The inactivation of what kind of protein could lead to cancer?

One that speeds up the cell cycle.

Explanation:

7 0

3 years ago

a scientist finds an organism that has a single cell without a nucleus this organism was found in pond water in which kingdom do

Fantom [35]

Answer:

Protista

Explanation:

In biology, there are said to be six different kingdoms that an organism can be classified under. They include Animalia, Plantae, Fungi, Protista, Archaea/Archaebacteria, and Bacteria/Eubacteria.

With this in mind, you say that a unicellular (single-celled) organism without a nucleus was found in pond water. This would point to the Protista kingdom, which are also known as protists. These organisms are single-celled beings with no big nucleus that are typically found in environments like ponds.

Hope this helped! I will take my 100,000 dollars via wire transfer (or just give this answer branliest)

6 0

2 years ago