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
tatiyna
2 years ago
14

Microbial cells first evolved on earth approximately ________ billion years ago.

Biology
1 answer:
melamori03 [73]2 years ago
7 0
Answer: <span> 3.8 to 3.9 billion years ago


</span>
You might be interested in
Compare the properties of the gas giant planets as a group with properties of Earth
____ [38]
The planets Venus, Earth, Venus, and Mars, are viewed as earthbound planets. Jupiter, Neptune, Saturn,  and Uranus are a piece of the gas monsters gathering. One contrast is that gas goliaths are comprised of hydrogen and helium and the earthly planets are comprised of carbon dioxide.
8 0
2 years ago
I need five parasite facts,they help me?please​
Elza [17]

Answer:

1. They are weird insects and the rest you could look it up

8 0
2 years ago
Read 2 more answers
Who proposed that traits acquired during one lifetime could be oassed to the next generation
aleksklad [387]

Answer:

Jean-Baptiste Lamarck

Explanation:

Just look it up

4 0
2 years ago
What determines the function of a protein​
Sauron [17]

Answer:

The sequence of amino acids. - The three-dimensional shape of the folded protein. - If the coding sequence has a mutation that leads to a change in the amino acid sequence, the protein may have a different three-dimensional shape, reducing its activity.

Explanation:

3 0
2 years ago
What are the primary atoms that make up the scents that we smell? 2. is scent subjective? why or why not? 3. what are the two di
aleksandrvk [35]

Answer: seen below

Explanation:

1) The olfactory receptor can recognize and respond to different ordor, For humans, most odorant molecules are made up of combinations of 5 kinds of atoms: these are, carbon, hydrogen, oxygen, nitrogen, and sulfur.

2) yes, scent is subjective. This is because there is likely variation in people's sensitivity to odor or personal appreciation of different odors. Not everyone smells the same thing.

3) The two proposed theories for the mechanics of scent recognition are; vibration theory and shape theory which is also called the lock and key model. The main problem with one of Turin theories is that we can't currently predict odor character from vibration any better than we can from shape. That is we are still terrible at predicting ordor character from molecular structure.

4) Science has contributed to the creation of scented products and perfumes by having chemical Mixtures Tested in labs and addition of substances for smell.

5) Scents or fragrances are used in cosmetology as perfumes, lotions, shampoos, face washes, body cream, conditioners, etc. Cosmetologist need to be aware of scents and fragrances because if a perfume had a scent that did not smell right then no one would want to purchase their product.

3 0
3 years ago
Other questions:
  • Which part of the sperm cell contains mitochondria necessary to power its trip through the reproductive system?
    13·2 answers
  • The client is diagnosed with primary hypertension. the nurse is educating a client about dietary changes that help decrease bloo
    9·1 answer
  • Classify the planets!!!!
    7·1 answer
  • Why do many scientists work in groups?
    15·1 answer
  • Samples of rejuvenated mitochondria are mutated (defective) in 3% of cases. Suppose 18 samples are studied, and they can be cons
    8·1 answer
  • A friend comes to you extremely agitated and says her husband beat her last night.She says she doesn't know what to do.You Can S
    15·1 answer
  • LIST OF 50 LIVING THINGS ​
    13·2 answers
  • In a muscle, __________. In a muscle, __________. the origin that elevates a structure is generally located above that structure
    12·1 answer
  • In Culinary class, Jennifer roads a recipe that noods wited spinach and decides to use salt to propare the leaves. She places th
    5·1 answer
  • How do organisms acquire the energy they need to live?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!