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
Alex
2 years ago
15

Which of the following organisms have existed on Earth for the longest period of time?

Biology
2 answers:
balandron [24]2 years ago
6 0

Answer:

single-celled organisms

Explanation:

Ira Lisetskai [31]2 years ago
4 0

Answer:

cyanobacteria.. single celled organisms

You might be interested in
Match each cell type with its description.
Alexeev081 [22]

Answer:

1. A natural killer cell identifies unusual cells, combines with them, and discharges perforin and molecules of granzyme that stimulates apoptosis.  

2. A basophil comprises huge concentrations of histamine in granules, gets stain with basic dye methylene blue, and helps in inflammation and allergic reactions.  

3. A macrophage refers to a huge agranular phagocyte, which is found within the tissues like lungs and brain.  

4. An eosinophil comprises histamine and major basic protein in granules gets stain with acidic dye eosin and helps in reactions against the helminths and protozoa.  

5 0
2 years ago
The portion of the membrane system in eukaryotic cells that is responsible for the making lipids and breaking down toxic substan
hichkok12 [17]
<span>The answer is smooth endoplasmatic reticulum. Smooth endoplasmic reticulum is involved in the production and metabolism of lipids and in the production of steroid hormones. Also, smooth endoplasmic reticulum converts organic chemicals to water-soluble products and that way detoxifies them.</span>
8 0
3 years ago
Read 2 more answers
ATP and ADP both play a role in cellular reactions involving energy how are these two molecules related
Rama09 [41]
Both are used for energy to the body.
8 0
3 years ago
Which molecule carries the instructions for producing mRNA
harina [27]
<span>the molecule that carries the instruction for producing mRNA is DNA</span>
8 0
3 years ago
Read 2 more answers
What reactions are condensation reactions
Komok [63]

Answer:

Condensation reaction: A reaction in which two or more molecules combine to form a larger molecule, with the simultaneous loss of a small molecule such as water or methanol. While this occurs in many reactions, the term is usually reserved for reactions in which a new carbon-carbon bond is formed.

5 0
2 years ago
Other questions:
  • Genetic engineering has the potential to correct
    13·2 answers
  • If we increase energy, what happens to temperature ?
    11·2 answers
  • Why is it important for organisms to be able to acclimate to changes in abiotic factors?
    10·1 answer
  • Which are repeated, cyclic behavior patterns related to external stimuli? Check all that apply.
    6·1 answer
  • Where does diffusion take place in the body?
    7·2 answers
  • RNA primer constructed during DNA replication needs to be replaced because Rna differs from dna. it contains ( adenine, cytosine
    9·1 answer
  • About how thick os the biosphere?
    14·2 answers
  • PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
    14·1 answer
  • Direction of the Earth’s axis changes over time.The Earth wobbles like a top on its axis 26,000 year cycle
    6·1 answer
  • Explain how a mutation could have no effect on the organism that inherits the mutation
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!