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
Zinaida [17]
2 years ago
9

Over the past century, several scientists around the world have made the following observations:

Biology
1 answer:
prohojiy [21]2 years ago
3 0

Mitochondria and plastids were once free living bacteria that underwent endosymbiosis inside a eukaryotic cell, which helped with cell respiration

You might be interested in
Organic molecules usually contain
choli [55]

Answer & Explanation:

An organic molecule is one which contains carbon, although not all compounds that contain carbon are organic molecules. ... Although carbon is present in all organic compounds, other elements such as hydrogen (H), oxygen (O), nitrogen (N), sulfur (S) and phosphorus (P) are also common in these molecules.

4 0
2 years ago
Can someone plss help me fill out this Taxonomic Key please
tia_tia [17]

Answer:

Following the instructions would give the following:

3. B - Minnesota

4. A. Mississippi

   B. Missouri

5. B Iowa

7. A. Louisiana

8. B. Arkansas

9. A. Tennessee

   B. Kentucky

10. A. Wisconsin

     B. Illinois

12.  A. New York

     B. North Carolina

13. A. California

     B. Colorado

4 0
2 years ago
Is a elk a producer consumer or decomposer
g100num [7]
An Elk is a consumer; it eats plants.
3 0
2 years ago
Which does NOT affect a molecules ability to cross a cell membrane?
aivan3 [116]

Answer:

b concentration insid e and out side the cell

3 0
2 years ago
Read 2 more answers
How can minerals crystallize from materials dissolved in water? (Select 2 choices )
Lynna [10]

Answer:

The correct options are:

2. From solutions that evaporate

4. From hot water solutions when the solution cools

Explanation:

The substances that can form minerals can be dissolved in the water to form a solution. Solution can be described as as a mixture in which a solute is dissolved in a solvent. When a particular dissolved solute evaporates from the solution, crystals of minerals might form. The mineral halite was formed when seas evaporated over a period of time.

The minerals can also be formed when a hot water solution gets cooled.

6 0
2 years ago
Read 2 more answers
Other questions:
  • According to Engelhardt, the phenomenon of bioethics should be understood as a late-modern intellectual undertaking that is abou
    13·1 answer
  • Humans are often referred to as "carbon-based" life forms. given that humans breathe oxygen, shouldn't humans be referred to as
    15·2 answers
  • Carbon is unique due to the carbon atoms?
    12·1 answer
  • The main building blocks of tissues and organs are
    13·2 answers
  • What are some of the immune functions <br> of the lymphatic system?
    7·1 answer
  • 18.
    6·1 answer
  • How many Hydrogen atoms are in 4H2SO4 ?
    8·2 answers
  • Which is the most efficient way to avoid DNA mutations from UV radiation?
    15·2 answers
  • What causes cohesion in water?​
    14·1 answer
  • Where do the decomposers come in the food chain if the pyramid gose like
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!