A solution is aA. combination of isotopes.

B. chemical reaction.

C. mixture in which the substances are evenly spread out.

D. mixture in which undissolved substances do not settle out.

Answers

Answer 1

Answer: (C) because when substances dissolve in it completely, it is called solution which has a even colour all over and no things settled down. But when we see undissolved things that do not settle down, it is called an colloid which make the visibility through it a little opaque and not clear like in the solution

Related Questions

Imagine you are a world famous primatologist, a scientist who studies primates. Anunidentified, complete fossil skeleton arrives at your lab. You suspect that it's a primatefossil. What observations would you make to determine if your suspicions are accurate?
Which type of lava is not associated with a volcanic eruption? basaltic, Rhyolitic, abdesitic,flood basalt
Which fungi group is known as the zygote fungi and produces spores in zygosporangia?
Which of the following is a true statement about tectonic plates?a.they located in the molten layer beneath the earth first. b.all tectonic plates are located at the earth's core c.they're located approximately 10 meters below the surface of the ocean. d.all of the earths landmass rests on tectonic plates.
Are Camels faster than Horses?

Which option correctly describes the structure of cell walls? A)Cell walls are rigid. They block the movement of all molecules. B)Cell walls are flexible. They block the movement of all molecules. C)Cell walls are rigid. Small molecules like water or oxygen can pass through them. D)Cell walls are flexible. Small molecules like water or oxygen can pass through them.

Answers

Answer:The correct option is C) Cell walls are rigid. Small molecules like water or oxygen can pass through them.

Explanation:

Cell walls are found in plant cells and some other organisms. They provide structural support and protection to the cell. The cell wall is made up of a rigid material called cellulose, which gives it its strength.

Cell walls are permeable, meaning that they allow certain substances to pass through them. Small molecules like water and oxygen can pass through the cell wall via small pores or channels. However, larger molecules, such as proteins and carbohydrates, cannot pass through the cell wall.

This selective permeability of the cell wall allows the cell to control the movement of substances in and out of the cell, maintaining its internal environment. It also helps prevent the cell from bursting under osmotic pressure.

In summary, cell walls are rigid structures composed of cellulose. They are permeable, allowing small molecules like water and oxygen to pass through, while blocking larger molecules.

The moon outside is very large, but you cannot see all of it. The calendar shows that the moon was invisible just less than two weeks ago. What phase is the moon in now?

Answers

The time when you can't see any of the moon at all is called "New Moon".

14.77 days later, the phase is "Full Moon".

The increased ranges of plant and insect species resulting from climate change has only negative consequences. Please select the best answer from the choices provideda. True
b. False

Answers

False,
the negative consequences from the climate is irrespective of the increased range of plant and insect species

Answer:

false

Explanation:

How does the contractile vacuole in a single-celled organism function to maintain homeostasis?a. It pumps water into the cell.
b.It pumps water out of the cell.
c.It pumps solutes into the cell.
d.It pumps solutes out of the cell.

Answers

Answer: "Option B- It pumps water out of the cell".

Explanation:

Vacuoles in the cell organism are responsible to maintain the amount of water in the cell body, to get stable in the environment vacuoles either remove or absorb the water through the mechanism of osmosis or osmoregulation.

Homeostasis is the phenomenon of maintaining balance of physical and chemical conditions of organism according to the environmental conditions to survive in it.

In single celled organisms, contractile vacuole pumps out the water from the cell through osmoregulation and excess of water is pumped out by the contractile vacuole.

It's b. When placed in a freshwater environment, the organism is in a hypotonic solution, so water would flow into the organism. To prevent from bursting the vacuole constantly pumps water out to make up for this.

Which metal works best to displace hydrogens from acid? A. Mercury
B. Lead
C. Gold
D. Iron

Answers

The correct answer is Iron. That is because it's higher than hydrogen in the reactivity series, and all other that are there can do it too. This includes things like things like Zinc too. Things that are positioned lower can't do this, which includes the ones you mentioned and others.

the correct answer is D

Which of the following describes a response controlled by the endocrine system?A. Dodging a moving car

B. Release of melatonin to regulate sleep cycle

C. Pulling your hand off a hot stove