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
ioda
3 years ago
12

What is a hard and tough rock that contains large crystals

Biology
1 answer:
frozen [14]3 years ago
5 0
I think the answer is Quartz
You might be interested in
A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 4 picograms of DNA
damaskus [11]

Answer:

b: 8;8

Explanation:

Mitotic or meiotic cell division constitute the m phase of the cell cycle. At the end of the m phase, the new cells enter the interphase stage of the cell cycle. The interphase is further sub-divided into;

  • <em>the G_0 phase,</em>
  • <em>the G_1 phase,</em>
  • <em>the S phase; and</em>
  • <em>the G_2 phase</em>.

The G_0 phase is essentially a resting phase. Cells that do not need to divide except when necessary move into this phase after exiting the m phase.

Actively dividing cells enter the G_1 phase after exiting the m phase. Cell development and growth takes place. From there, the cells enter the S phase where DNA replication/synthesis takes place. The cells then enter the G_2 phase where proteins are synthesized in preparation for division or m phase.

At the S phase, the amount of DNA a cell carries is doubled but the chromosome number remains the same. For example, if a cell enters the S phase with 2 g of DNA containing 10 chromosomes, at the end of S phase, the amount of DNA would have come 4 g while the number of chromosomes will remain 10.

Hence, if the average amount of DNA in the assayed cells immediately after mitosis is 4 picograms, the amount would be 8 picograms at the end of S phase and will still remains 8 picograms at the end of G_2 phase.

The correct option is b.

8 0
2 years ago
Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycl
Studentka2010 [4]
Hi these proteins are called *Cyclins *
Hope this helps you please help me by saying thanks.
8 0
3 years ago
Which wold tell you for sure if you had a sample of real gold​
Advocard [28]

To perform this test to check if gold is real, make a light, tiny scratch on the item using a small nail file. Choose a spot that is not noticeable if possible. Use a dropper to apply a small drop of nitric acid to the scratch. If there is no reaction, then the piece is probably made from real gold.

5 0
3 years ago
Read 2 more answers
Which type of mutation occurs only in reproductive cells
dimaraw [331]

Answer:

Germ line Mutation

Explanation:

4 0
3 years ago
The Karez well system _______.
Xelga [282]

Answer:

c. transported groundwater from a distance

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which organisms contain jaws and limbs
    5·1 answer
  • Prokaryotes and eukaryotes are similar in all of these aspects except
    13·2 answers
  • Color is ________.
    6·2 answers
  • In a family, the father is affected by a genetic disorder. The son in the family has the same disease, but the daughters don’t h
    14·2 answers
  • A parachute uses __ to slow down.<br><br> A. Gravity<br> B. Air Resistance<br> C. Tension
    11·2 answers
  • Where can you find carbon inside an organism?
    6·1 answer
  • Is the thermos considered a conductor or insulator?
    14·1 answer
  • Use your knowledge of osmosis to explain why the mass of each cube increased.
    14·1 answer
  • What are the membrane structures that function in active transport?
    15·2 answers
  • What do plants use to make up their structure?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!