Why might a speaker choose NOT to use contractions in a formal speech?

A. Contractions are too short.

B. Contractions are rude.

C. Contractions are informal.

D. Contractions are improper.

QUESTION :::::

Which gas is most necessary for plants to do photosynthesis?

A. carbon dioxide

B. nitrogen

C. oxygen

ANSWER ::::

carbon dioxide

To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.

Explanation:

CAN I GET THE CROWN PLEASE I HOPE IT HELPS THANKS

About the question:

You will find the cell image in the attached files

Answer:

b.Store water

Explanation:

Here we are looking at a vegetable cell. And specifically, the X letter is labeling a vacuole, which we can recognize by its size.  

We can find vacuoles either in animal or vegetable cells. They are essential to the correct functioning of the cell.

Now we are going to describe a vegetable cell vacuole.

Usually, they occupy a central place on the vegetable cells. They are big organules, representing almost 90% of the total cell volume. They are the biggest-sized organelle of vegetable cells.

Vacuole formation is thanks to the fusion of many vesicles release by the Golgi complex, and sometimes, with the RER intervention. There are different types of vacuoles according to their function, and many times, a single cell might carry different types of vacuoles. These organelles harbor diverse fluids, among which there are water and enzymes. Eventually, they can also contain solid substances such as proteins, salts, and sugars.

Vacuoles accomplish different functions. The main one is to keep turgor, store waste elements, and substance degradation. Here we are going to focus on the turgor function that involves water storage.

Turgor is a measure of hydrostatic pressure against the cell walls and controlled by these organelles. Vacuoles incorporate substances in their interior such as ions, creating an osmotic environment variable concerning the cytoplasmic one. This environmental variability produces a water flow from inside to outside and vice-versa. The capability of water storage is crucial for vegetable cells.

Answer:

D. A nitrogen base has been added to the DNA molecule.  

Explanation:

You can see that the sequence for the nitrogen bases are in the exact same order after the exposure, this rules out A.  You can count how many bases there are, 7 before and 8 after so it cannot be B. Lastly, given that they are in the same order as were before and that a base has been added, you can see that no bases were replaced (so not C) and that D is your answer.  

Answer: Periodic table

Explanation:

Answer: Periodic table of the elements

The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.

Answer:

false

Explanation:

The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. For example, turning on a light would seem to produce energy; however, it is electrical energy that is converted.

Hope this helps get an A for me kay!!!

Answer:

It looks at the role of adenosine triphosphate, or ATP, a chemical that can be released by red blood cells and is believed to cause blood vessels to dilate during exercise, when muscles demand more oxygen.

Explanation:

Hope this helped Mark BRAINLIEST!!!