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Anna11 [10]
3 years ago
9

Most fish do not sink in water because of the presence of

Biology
1 answer:
adoni [48]3 years ago
3 0
The correct answer is A. l and ll are correct.
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In this lab, you used a dichotomous key to identify organisms. Why would this skill be valuable to you? Check all possible reaso
Oliga [24]

The reason why a dichotomous key to identify organism is valuable, is because it helps you classify organisms,it helps you identify eco -systems, it helps you analyze an organism's traits.

Explanation:

A dichotomous key is a skill that has been brought about by scientists, to help people to identify and classify organisms.

In Dichotomous key, the main way of identifying an object is by it scientific name.This is because, though two objects might look similar to each other but they might belong to a whole different species.

So, it is is easier to identify the organism from its scientific name, as it will tell us which species it belongs to.

This key is very useful to people who are novice, and don't know much about identifying an organism.

This key also helps identifying, whether an organism belongs to a particular closely related group of organisms or is a separate organism.

It helps one analyze the traits of an organism, and based on their characteristics, it will help you identify and classify the species of the object or organism.

3 0
3 years ago
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Earth’s energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be us
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3 types of energy that could be used in my house would be solar, wind, and normal electric.  The ideal energy source that is not harmful to the environment is solar, as it can power a house, and doesn't use up non-renewable resources.
Brainliest, please?Thanks!

5 0
3 years ago
The minimum amount of energy needed to start a chemical reaction is known as:
nadya68 [22]

Answer:

The correct option is B. Activation energy

Explanation:

The activation energy is usually used to designate the minimum energy necessary for a given chemical reaction to occur, that is, the basic requirement for the reaction to proceed.

For a reaction to occur between two molecules, they must collide in the correct orientation and have a minimum amount of energy. As the molecules approach, their electron clouds are rejected. This requires energy (activation energy) and comes from the heat of the system, that, is, from translational, vibrational energy, etc of each molecule. If the energy is sufficient, the repulsion is overcome and the molecules are close enough for a rearrangement of the bonds of the molecules.

The concept of Activation energy was introduced by Arrhenius in 1889. Arrhenius suggested that molecules must prossess a minimum amount of energy to react. That energy comes from the kinetic energy of the clliding molecules. Kinetic energy serves to cause reactions, but if the molecules move very slowly, the molecules will only bounce when they collide with other molecules and the reaction does not happen. In order for the molecules to react, they must have a total kinetic energy that is equal to or greater than a certain minimum value of energy called activation energy.

6 0
3 years ago
Label the letters in the diagram​
Vera_Pavlovna [14]

Answer:

A- I have not idea sorry!

B- Looks like a vacuole

C- Cell membrane

D- Endoplasmic Reticulum

Explanation:

8 0
2 years ago
Part F
Wittaler [7]

Answer:

The activity factor was modified. Ambulating indicates that the person is active. Even small activities require energy. So, people who can walk around and aren’t bedridden expend more calories than people who need to be on bedrest all day. Also, when the stress factor was changed to severe infection, the caloric requirement increased. This increase is probably because the immune system requires more energy to fight off the infection

hope this helps

7 0
3 years ago
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