BIOLOGY HIGH SCHOOL

Throughout history, many unscientifically based claims have been made. One such claim wasthat some people believed that fleas actually came from dust. Which part of the cell theory
provides a basis for disproving this claim?

Answers

Answer 1
Answer:

It can be deduced that the cell theory that provides a basis for disproving this claim is that all cells are from existing cells.

What is a cell theory?

It should be noted that a cell theory simply means that all biological organisms are made of cells.

In this case, some people believed that fleas actually came from dust. This was proved wrong as the cell theory states that all cells are from existing cells.

Learn more about cell theory on:

brainly.com/question/3966602
Answer 2
Answer:

Answer:

There are no options to this question, however, it can be answered. The answer is:

All cells arise from previously existing cells

Explanation:

The universal cell theory was proposed in 1830's by three scientists viz: Rudolf Virchow, Mathias Scleiden, and Theodor Schwann. The cell theory consists of three major components which are generally accepted and used till date. The components are:

- All living things are made up of one or more cells

- The cell is the fundamental and basic unit in every living thing.

- All cells arise from previously existing cells via cell division

According to this question, many unscientifically based claims including the believe that fleas actually came from dust have been made. This claim has been DISPROVED by the part of the cell theory that states that "All cells arise from previously existing cells via cell division". Hence, fleas do not arise from dust but from other cells according to cell theory.

Related Questions

If the producers in a food web were removed, which of the following changes wouldmost likely occur? (SB5b)A. The populations of the remaining organisms in the food web would increase.B. The entire food web would collapse over time.C. The food web would depend on the decomposers for energy.D. The consumers would begin making energy for the food web.
Coral and sea anemones are botha. sponges. b. flatworms. c. cnidarians. d. roundworms.
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The relative concentration of water in a hypotonic solution is _____.high
low
equal
stable

Answers

Answer: The correct answer for the fill in the blank is High.

Hypotonic solution is the one, which contains less concentration of solute (like salt)  as compared to the solvent (water).

In other words, in a hypotonic solution, the concentration of solvent is higher than the concentration of solutes.

Thus, the relative concentration of water ( which is a solvent) in a hypotonic solution is high.

The relative concentration of water in a hypotonic solution ishigh. The correct answer between all the choices given is the firstchoice. I am hoping that this answer has satisfied your query about and it willbe able to help you.

what happens to the thickness of the uterine lining when the level of progesterone reaches its highest level?

Answers

Answer:

Becomes thick with blood vessels passing through

Explanation:

Progesterone levels are the highest in the middle of the  luteal phase i.e at the eighth or ninth day of menstural cycle. it is the hormone which is released after ovulation. It is produced by the corpus luteum (an area created by the collapsed follicle) which consists of ovulated egg. At this stage the uterus lining gets thick and also estrogen is at high level. If the conception does not takes place the level of progesterone falls as the corpus luteum starts to break.
What happens at that point is that the lining sheds through the vagina otherwise known as the menstrual cycle which occurs if the egg has not been fertilized.

Which two scientists helped to disproved the idea of spontaneous generation?A) Aristotle & Linnaeus
B) Redi & Pasteur
C) Watson & Crick
D) Hooke & Leeuwenhoek

Answers

The answer would be B. Redi and Pasteur
Hope this helps!

Inside a prokaryote such as e. coli, an opera on controls for the production of the amino acid tryptophan. what occurs in the cell in order to turn off the production of tryptophan.

Answers

Trp operon is regulated so, that when tryptophan is present in the environment, the genes for tryptophan are not expressed. 

How do runoff and groundwater differ

Answers

Groundwater is water located in the ground, while runoff is excess water flowing across a surface.

A neuron's sodium channels are malfunctioning and will no longer open. How would this prevent the cell from changing its polarity, and why?

Answers

The cell will not be able to depolarize due to unavailability of sodium ions.

What is the role of sodium gates in action potential?

  • Sodium voltage-gated channels can be either closed, open, or inactive.
  • Voltage-gated sodium channels are closed when at rest. Both an activation gate and an inactivation gate are present in voltage-gated sodium channels.
  • Although the inactivation gate is open, the activation gate is closed. This conformation is closed but capable of opening. Some of the activation gates open as a result of membrane depolarization brought on by a stimulus.
  • Both the activation and inactivation gates will be opened at this point. As sodium ions enter the cells, nearby activation gates will open.
  • A greater amount of sodium will enter the cells as a result, initiating an action potential.
  • Both gates open when certain depolarization thresholds are reached. Action potential increases to its maximum as sodium rushes into the cell.
  • The inactivation gate will gradually close and the permeability of the membrane to sodium ions will decrease. The channel is now in a state known as "closed but not capable of opening."

learn more about depolarization here: brainly.com/question/3040056

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Answer:

it could not depolarize because the cell cannot become more positively charged.

Explanation:

When sodium gates open, depolarization occurs, changes the charge of the ion from negative to positive. Therefore, if the sodium channels no longer open, the flow of sodium into the cell that changes the charge from - to + and depolarization would not occur.

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