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
sergey [27]
3 years ago
11

What are the two classes of pure substances?

Biology
2 answers:
Viefleur [7K]3 years ago
8 0

Elements and compounds

Alenkinab [10]3 years ago
5 0

Answer:

Elements and compounds

You might be interested in
Define adult stem cells. Explain the pros and cons of Adult Stem Cells
WARRIOR [948]

Answer:

hi hope this helped you

3 0
3 years ago
Typically, where would we expect to find older fossils?
melomori [17]
Africa, Australia, etc because they are the oldest ones.
6 0
3 years ago
A plant has dominant and recessive traits for flower color. The dominant color is amethyst (A), and the recessive trait is white
telo118 [61]
Answer:A
Homozygous means both alleles are the same. This leaves A and B
Only choice A has heterozygous(different) alleles for offspring,so it is the right answer
3 0
3 years ago
Read 2 more answers
How do the circulatory and endocrine systems work together?
slavikrds [6]
The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
7 0
3 years ago
Read 2 more answers
Hey everyone I will be choosing brainliest for the best answer and pls no scamming.
vladimir1956 [14]

Answer:

There are four steps in solving a stoichiometry problem:

Write the balanced chemical equation.

Convert the units of the given substance (A) to moles.

Use the mole ratio to calculate the moles of wanted substance (B).

Convert moles of the wanted substance to the desired units.

Explanation:

(https://socratic.org/questions/how-to-solve-the-problems-of-stiohiomerty-what-is-the-formula-of-stiohiomerty) This site will give you all the info you need on how to solve it! Gives examples too!

4 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is an enzyme? lactose adenosine protease phosphate
    10·1 answer
  • The rough endoplasmic reticulum has a rough appearance because:
    15·1 answer
  • The heritable variation among members of a population comes about because of
    8·2 answers
  • The Structure of the Neuron Neurons: Nerve cells, the basic elements of the nervous system Have a cell body that contains a nucl
    5·1 answer
  • Which trophic level has the least available energy in kilojoules in this food web?
    6·1 answer
  • The Colorado Plateau is an example of blank mountains
    5·2 answers
  • Can transcription and protein synthesis in eukaryotes occur simultaneously? Why?
    6·1 answer
  • Which of the following increases genetic variation by forming entirely new alleles?
    13·1 answer
  • What is the type of asexual reproduction that occurs in yeasts?
    13·2 answers
  • Which of these may be caused by an interaction between the hydrosphere and geosphere?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!