1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novay_Z [31]
3 years ago
7

According to Moh's hardness scale, your fingernail would be rated as 2.5. Juan and Carol are trying to identify an unknown miner

al. Carol can scratch the mineral sample with her fingernail. Juan and Carol know the mineral MUST be one of these four choices. Based on the scratch test, the mineral is
Biology
2 answers:
Elan Coil [88]3 years ago
5 0
I think it's B., calcite.

Not sure though.

Hope this helps, 
-Tiara
zysi [14]3 years ago
3 0

<u>I think the answer might be B. Calcite because it says it is at 2.5, it can't be gypsum because it's at 2 and when you round 2.5 it's closer to 3 than 2. So it will be B. </u>

You might be interested in
What is the mean height for the grass used as a control? <br> 2 cm.<br> 4 cm.<br> 6 cm.<br> 12 cm.
meriva
Hi.
your answer is 6 cm.
hope this helps!!!

7 0
3 years ago
Question 13 of 20:
IrinaK [193]

the following is formed when a group of tissues works together to perform a common function is called an Organ.

<h3>What is the definition of organs?</h3>

The word organ derives from the Latin term organum (instrument, tool). These structures are objects of physiology, the area of ​​biology that studies how organisms, systems, organs, cells and molecules perform chemical and physical functions in the body.

In this case, is correct to say that an organ is formed when a group of tissues works together to perform a common function.

See more about organ at brainly.com/question/12825206

#SPJ1

5 0
2 years ago
You are growing yeast cells in a culture. After a few days of consistent growth, you notice that cell growth has slowed consider
BigorU [14]

The correct answer is C) There is not enough oxygen in the culture medium. This is because of alcoholic fermentation, and anaerobic process where the yeast transform sugar (glucose) in ethylic alcohol (ethanol) and carbon dioxide. Glucose is decomposed into pyruvic acid which then after turns into CO2 and ethanol. The bubbles described, are produced by the carbon dioxide.

The yeast, as well as some bacteria, use the glucose molecule through "glycolysis"  to obtain a 3-carbon molecule called pyruvates. Glycolysis consists of 10 coupled reactions, in the end, from one glucose (6 carbons) the yeast will obtain two pyruvates (3 carbons each).

Pyruvate can follow three main routes to obtain ATP, end up as lactate, as carbon dioxide (CO2) and water or as ethanol (alcohol) and CO2. Regarding yeast, it can only be used to obtain Ethanol plus CO2 or to obtain CO2 plus water.

The path that follows from here depends on the reaction medium. The cell gets much more energy (38 molecules of ATP) by converting pyruvate into water + CO2 than by turning it into ethanol + CO2 (2 molecules of ATP). Then, whenever possible, the yeast will follow the CO2 + water path. To support this route the cell needs oxygen.  In this case, the cell obtains its energy by breathing when there is no oxygen available, the yeast has a way that allows it to gain much less energy but allows it to survive, the alcoholic fermentation, previously mentioned.

Therefore, A, B, and D answers are wrong for the reasons mentioned above.


8 0
3 years ago
Compartments A and B are separated by a membrane that is permeable to K+ but not to Na+ or Cl-. At time zero, a solution of KCl
DaniilM [7]

Answer:

The electrical and diffusion potentials for K+ will be equal in magnitude and opposite in direction.

Explanation:

The cell potential may be defined as the potential difference between the inside of the cell and outside the cell. This difference is important for the transmission of nerve impulse.

The equilibrium condition may be defined as the condition at which  the exit and the entrance of the ions will be equal. As the information in the question, Only potassium ions will move inward and outward of the cell. The potassium ions will move in opposite direction since the equilibrium has been reached.

Thus, the correct answer is option (D).

5 0
3 years ago
Amphibians have internal fertilization that requires the presence of water. true or false
BaLLatris [955]
False. Amphibians like frogs reproduce sexually like mammals. Where's organisms like the hydra reproduce by budding and organisms like the sea anemone, use water to carry their sperm and eggs.
5 0
3 years ago
Other questions:
  • What is the malthusian limit<br>​
    5·1 answer
  • Small, pinpoint hemorrhages in the skin are known as
    7·1 answer
  • How can a build-up of carbon dioxide in the atmosphere increase Earth's global temperature?
    15·1 answer
  • Which of the following substances is NOT able to simply diffuse across the 1 point
    8·1 answer
  • now inspect the epithysis, the end of the long bone. Notice that it is composed of a thin layer of compact bone enclosing spongy
    15·1 answer
  • Lindsey sees a beautiful red cardinal bird in the backyard eating food from a bird. Lindsey picks up her camara to take a pictur
    7·2 answers
  • The two objects shown are made of the same element. What else is true of
    10·1 answer
  • What TWO answer are they please explain i will be giving brainliest to the correct answer:D
    14·1 answer
  • A blank cell that becomes specialized during development
    12·2 answers
  • Can someone give me the answers and teach me how to do this?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!