Circle the word that best completes the statement about cell theory.

Biology

1 answer:

e-lub [12.9K]3 years ago

4 0

Question reformatted:

Circle the word that best completes the statement about cell theory.

6. The cell theory states that:

i. All organisms are made of organelles / cells.

ii. All existing cells are produced by other living / dead cells.

iii. The atom / cell is the most basic unit of life.

7. Cell theory is one of the great unifying theories of biology / chemistry

Answer:

6. The cell theory states that:

i. All organisms are made of cells.

ii. All existing cells are produced by other living cells.

iii. The cell is the most basic unit of life.

7. Cell theory is one of the great unifying theories of biology 

Explanation:

Cell theory is one of the central theories of biology and is universally accepted. It states that all organisms are cellular - that is they are made of cells. It also states that all living things come from other living cells (not spontaneously, or from dead cells). The cell is the most basic unit of life, organisms can be unicellular, but no living thing is 'less' than that.

You might be interested in

A scientist has a very small sample of DNA. To analyze the DNA, which would be the MOST USEFUL first step for the scientist to f

Karo-lina-s [1.5K]

Answer:

B. Use the polymerase chain reaction (PCR) to make multiple copies of the DNA.

Explanation:

The scientist is to analyze a small sample of DNA, the most useful step to start this would be first the use of polymerase chain reaction to make various copies of that DNA sample. PCR is essential and quick process that gives a lot of copies within few hours. It uses the sample or target DNA, according to which the primers are designed. Taq polymerase and DNA polymerase are also used in the process, it consist of various cycles in which copies are made. There are three basic steps 'Denaturation', 'annealing', and 'extension'.

5 0

4 years ago

When food moves through the esophagus, the muscular contractions are wave-like. nutrients are absorbed in the esophagus. skeleta

sveticcg [70]

The answers are;

The muscular contractions are wave-like

The muscular contractions are entirely involuntary

This action is called peristalsis. It is powered by the expansion and contraction of the smooth muscles present in the esophagus. It is controlled by the sympathetic activity of the autonomic nervous system hence the movements are involuntary.

8 0

3 years ago

In the northern hemisphere, when does the phytoplankton biomass peak in the polar region? why?

White raven [17]

Given what we know about phytoplankton biomass peaks in the polar region of the northern hemisphere, we can confirm that this occurs in the spring.

As the polar regions are tilted away from the sun, days there are short, sometimes these regions even enter month-long periods of darkness. Due to this, sunlight is not always strong enough to penetrate deep into the water.

In the Northern Hemisphere, the phytoplankton biomass peaks in the spring given that during this time the sun is high enough in the sky for sunlight to penetrate deep into the water and provide a food source for the plankton to thrive.