Which statement describes one feature of chemical changes? They never change a substance’s properties. They change a substance’s identity. They can usually be reversed. They keep a substance’s arrangement of atoms the same.

Answer: C

Explanation:

A keystone species helps to  define an ecosystem. The correct answer is option C.

It is that they help to hold the systems together. It will be difficult for the certain species to adapt to the changes that environment goes through.  

Keystone species are species which has the  significant and a large influence on community structure with the characteristics.  It is often considerably  with the  lower  abundance and  the biomass in comparison to dominant species. If  removed  such species can  cause  a serious disruption in  the structure with the function of  a community.

In  marine ecosystem  or other type of  an ecosystem in that case  a keystone species defines an  organism which helps to  hold system together.  Excluding such species, ecosystems will sound very different. Some of them might  not  adapt to environmental changes and  if the keystone species disappeared.

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Answer:

I believe the answer is polarity, though I am unable to find an exact statement.

Explanation:

I believe it is polarity because of the way water moves through a plant and its relation to gravity.

Answer:

Phloem

Explanation: Phloem is the vascular tissue responsible for transporting organic nutrients around the plant body, carries dissolved sugars from the leaves (their site of production) or storage sites to other parts of the plant that require nutrients.

Answer:

Correct answers:

1

Gogli apparatus

2

nucleolus

3

endoplasmic reticulum

4

mitochondrion

5

ribosome

6

lysosome

Explanation:

just took the test hope this helps :)))))

The terms that correctly identify the indicated structures in this sketch of a cell viewed under a microscope are as follows:

A Microscope may be defined as a type of laboratory instrument which is utilized to observe small things that are too small to be visualized by the unaided eyes. This type of instrument is typically used to view cellular functions and structures.

A large central vacuole accounts for almost 90% of the plant cell volume. The Cell wall of the plant is made up of cellulose. Mitochondria deliver energy that is needed by the cell in order to accomplish metabolic activities. A Chloroplast is a membrane-bound cell organelle that facilitates the process of photosynthesis.

Therefore, the terms that correctly identify the indicated structures in this sketch of a cell viewed under a microscope are well mentioned above.

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Answer:

delay or stifle the emergence of the perspective

Explanation:

I hope this helps :)

Answer:

7

Explanation:

The atmosphere is comprised of layers based on temperature. These layers are the troposphere, stratosphere, mesosphere and thermosphere. A further region at about 500 km above the Earth's surface is called the exosphere.

Answer:

a centimeters

Explanation:

I think this is right. has both centimeters and millimeters but centimeters are labeled

Answer:

A) centimeters.

Explanation: