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Mice21 [21]
2 years ago
8

Discuss the ways in which characteristics that suit a species for survival are transmitted from one generation to the next (disc

uss cells, chromosomes, DNA, and genes).
Biology
1 answer:
mina [271]2 years ago
8 0

      Well, the first thing you need to understand to answer this question is Darwin's theory.

      What happens is that, for example, a species of giraffe has a small neck, what happens to it is that this species can't get the food on top of the trees, and then, this species will most likely die in a couple of time. But through mutation, this species can generate another one that fits well into that environment, being capable to get food on the ground or even with a bigger neck, and by that, the survival of the species is guaranteed for now. Let's think about humans for a second, we are a species that went through evolution as well as all the species on earth right? But how did that happen?           It's easy, if one of our ancestors for example, didn't have the right DNA/genes that gave us a feature that protected us from some diseases, we would probably be dead.

        And be careful, a gene can be anywhere in a chromosome, that's why it's so hard to study and map it. The same thing happen to cells, if they dont adapt well, they die or adapt on the next generation.

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this part of the stomach contains thick muscle to mix the food and move the food into the duodenum. it is called _____.
Alla [95]

Answer:

Pylorus

Explanation:

The stomach is a J-shaped organ which is a part of the digestive system. The digestive system on one end is attached to the oesophagus and on the end to the small intestine.

The pylorus structure of the stomach is composed of thick muscles which help to mix or agitating the food in the stomach and controls the movement of the food to the duodenum which is the first part of the small intestine. The movement is controlled by the ring of muscles in the pylorus called pyloric sphincter.

Thus, Pylorus is the correct answer.

6 0
2 years ago
Did trilobites and dinosaurs live at the same time? What is your evidence?
IrinaVladis [17]

Answer:

No because Trilobites are older because they are in the deepest rock layer and the dinos aren't plus Two species of trilobites found in the Southwestern United States. Trilobites went extinct 250 million years ago, long before the appearance of the first dinosaurs.

Explanation: because i love talking about fossils

8 0
2 years ago
What would be the best negative control to use when testing for any organic compounds
ra1l [238]

Explanation:

A similar question was asked online, here is the answer it gave:

'“Negative control” is a treatment that by definition is expected not to have any effect (neither positive effect, nor negative effect). “Positive control” is treatment with a well-known chemical that is known to produce the expected effect with the assay that you are studying. Application of an antagonist is not a negative control in your case. “Negative control” is condition that should be treated with the same solutions or buffers as your “treatment” condition, with the only difference that instead of the chemical that you investigate you should add just the solvent that was used to dissolve you chemical in the respective final concentration that you have in the “experimental treatment” condition. For example if your chemical is dissolved in DMSO – than the correct negative control will be to add to the medium/buffer just DMSO in the same final concentration that you reach with your “treatment” condition. One of the reasons of using such negative control is to verify that the solvent is having no effect in your assay. Note that among all treatment conditions (“negative control”, “positive control”, “experimental treatment you are investigating”) the volumes and the composition of the treatments that you are doing should be uniform: always treat with the same volume of medium or buffer, always containing the same concentration of the used solvent (e.g., DMSO). The only difference should be the presence or absence of the defined compound-treatments (agonist, antagonist, the chemical for the experimental investigation etc.).'

My best advice is to use the textbook you have, or use examples of a negative control when testing organic compounds because you have to find something that you can assign, like a worm in a box of dirt, the worm could have enough food to survive, so that is your negative control, but when it comes to finding the best, that would have to rely on something within the parameters of being self sufficient like a plant getting its energy from photosynthesis, etc.

Atanasov, Atanas. (2013). Re: Positive control and negative control. Retrieved from: https://www.researchgate.net/post/Positive_control_and_negative_control/515968f2d039b1fe50000025/citation/download.

7 0
3 years ago
What part of the nervous system is known as the mini brain of the gut
dezoksy [38]
The Enteric Nervous System is known as the mini brain of the gut.
5 0
3 years ago
What precautions need to be taken in order to euthanize mice by carbon dioxide inhalation while ensuring the least amount of str
Mekhanik [1.2K]

Be using a flow rate that moves 30% to 70% more volume through the cage or chamber each minute precautions need to be taken.

Inhale- To breathe in is to inhale. In contrast to "exhale," which is to breathe out, it is the reverse. Through our lips and nostrils, we take air into our lungs when we inhale, and breathe out again.

Lungs- The two spongy, pinkish-gray organs in our chest are our lungs. Air enters our lungs during inhalation, and oxygen from that air travels to our blood during breathing. Additionally, a waste gas called carbon dioxide travels from the blood to the lungs where it is expelled. 

To know more about the Inhalation, click on the below link,

brainly.com/question/6991606

#SPJ4

3 0
1 year ago
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