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
antiseptic1488 [7]
3 years ago
15

Coal and natural gas are examples of

Biology
2 answers:
DIA [1.3K]3 years ago
8 0
Coal and natural gas are examples of A) nonrenewable resources. Those are resources that cannot be used again and again and can run out if their supply runs out. 
goblinko [34]3 years ago
4 0

The right option is; A. nonrenewable resources  

Coal and natural gas are examples of nonrenewable resources.

Nonrenewable resources are resources that are available in limited supply and will run out after some time. The use of these resources is not sustainable and they cannot be readily replaced in the earth (their formation requires billions of years). Non-renewable resources include fossil fuels such as coal, natural gas and oil.

You might be interested in
g Describe the structure of Hemoglobin. Does the binding of oxygen involve the direct interaction with the polypeptide chain
Scorpion4ik [409]

Answer:

Hemoglobin is an iron-containing protein present in the blood that functions for transportation of oxygen to different body cells..

Each hemoglobin molecule have tetrahedral structure consist of four heme groups surrounded by a globin group. Heme, is composed of porphyrin (ringlike organic structure) which is attched to an iron atom. There are four iron atoms in each molecule of hemoglobin that binds with four oxygen atoms and globin carry two linked pair of polypeptide chain.

The oxygen reversibly binds with the polypeptide chain and the process called oxygenation.

7 0
3 years ago
DNA within the cell is wrapped around nucleosomes to form chromatin. When chromatin is in the form of a 30 nm fibril, how many c
vodomira [7]

Answer:

The correct answer is option b. "20 H1, 40 H2A".

Explanation:

Chromatin is a complex that protects and condenses the genetic material comprised of DNA and proteins. When chromatin is in the form of a 30 nm fibril, nucleosomes have a regular positioning along the DNA. This means that each nucleosome is associated with a single H1 molecule. Therefore a chromatin containing 20 nucleosomes will have 20 copies of H1 and 40 copies of H2A, because each nucleosome has 2 copies of the core histone H2A.

8 0
3 years ago
​immediately before passing into the large intestine, the food mass must pass though the ____. ​ileocecal valve ​pyloric sphinct
N76 [4]
​immediately before passing into the large intestine, the food mass must pass though the <span>ileocecal valve.
</span>This muscle valve is part of the gastrointestinal system and separates the small intestine and the large intestine. The valve <span>opens when a bolus of food passes from the small intestine into the large intestine (your inner sewer pipe) during peristalsis.</span>
8 0
3 years ago
Citrus trees create their seed by a method of asexual reproduction by a process called
Nesterboy [21]

Answer:

Some plants can produce seeds without fertilization. Either the ovule or part of the ovary, which is diploid in nature, gives rise to a new seed. This method of reproduction is known as apomixis. An advantage of asexual reproduction is that the resulting plant will reach maturity faster.

Explanation:

7 0
3 years ago
Read 2 more answers
An educated guess that is a possible explanation for an observation
Crazy boy [7]

Answer:

yes

Explanation:

yes

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is leucoplasts?<br> Any body can define it?
    15·1 answer
  • "Do you believe that GMO's should be widely available to consumers around the world or should GMO's acceptance continue to be li
    14·1 answer
  • if you were given a slide containing living cells of an unknown organism .how would you identify the cells as either plant or an
    15·2 answers
  • Where does the heating process begin in a hot water heater system?
    9·1 answer
  • Producers transform light energy into chemical energy. True or false
    7·1 answer
  • Which is an example of a chemical change?
    5·2 answers
  • Green algae contain the same photosynthetic pigments found in
    14·2 answers
  • 30 POINTS! NEED HELP ASAP
    8·1 answer
  • Scientists create models to help make sense of the natural world. Models are powerful tools that help scientists predict how
    13·1 answer
  • Question 1 of 10
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!