Question

Q: When a cell is placed in a hypotonic solution, water moves by osmosis into the cell, making it swell.

True or False

Q: Diffusion is the movement of molecules from a low concentration gradient to a high concentration gradient.

True or False

Q: Even if you are dying of thirst, you should not drink salt water, as this will dehydrate you further. This is because salt water is a(n) ____________ solution relative to our cells.

A) acidic

B) hypotonic

C) hypertonic

D) isotonic

Q: Which of the following is evidence for the theory of endosymbiosis?

A) Eukaryotic cells have DNA.
	B)	Mitochondria and chloroplasts have their own DNA.
		C)Prokaryotic cells are typically larger than eukaryotic cells.
		D) Eukaryotic cells have organelles.

Q:All plant cells have what feature?

A) Cell wall
		B) Chloroplasts
		C) Centrioles
	D)	Both A and B

Q: Why do cells only grow so large before they must divide?

A) To increase efficiency.
		B) To increase their surface area to volume ratio.
		C) To decrease the time it takes to move materials in and out of the cell.
		D) All of the above

Answer 1

please find the answer q1,2,3,4,5 not 6

Q When a cell is placed in a hypotonic solution, water moves by osmosis into the cell, making it swell.

Answer is true

A hypotonic solution is any solution that has a lower osmotic pressure than another solution. In the biological fields, this generally refers to a solution that has less solute and more water than another solution.

The greatest concentration of water is outside the cell. Therefore, water enters the cell and fills the central vacuole, causing the contents of the plant cell to press against the cell wall. The plant cell swells and stiffens as turgor pressure increases.

Q.Diffusion is the movement of molecules from a low concentration gradient to a high concentration gradient

Answer is false

Diffusion is the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration of substances is uniform throughout. of substances is uniform throughout.

Q Even if you are dying of thirst, you should not drink salt water, as this will dehydrate you further. This is because salt water is a(n) ____________ solution relative to our cells

Answer is c hypertonic

By drinking salt water, the concentration of solutes outside the cells will increase causing the water inside the cell to move out making the cell shrink. The solution outside the cell is hypertonic and can cause dehydration

Q: Which of the following is evidence for the theory of endosymbiosis?

Answer b mitochondria and chloroplasts have their own DNA

The first piece of evidence that needed to be found to support the endosymbiotichypothesis was whether or not mitochondria and chloroplasts have their own DNA and if this DNA is similar to bacterial DNA. This was later proven to be true for DNA, RNA, ribosomes, chlorophyll (for chloroplasts), and protein synthesis.

Q All plant cells have what feature?

Answer is A cell wall

Because cell wall is present in all the plant and chloroplast, chlorophyll, a green pigment that absorbs light energy fo rphotosynthesis. However, chloroplasts are not found in all plant cells. For example, they are not found in root hair cells