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SVETLANKA909090 [29]
3 years ago
6

Why does it become difficult to read old fossils?

Biology
2 answers:
notsponge [240]3 years ago
6 0
A is the correct answer
Lina20 [59]3 years ago
4 0
A. is the answer because they are found in the earths crust because overtime dirt and water covered the fossils

if i helped plz make me brainiest
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Explain what it means for a section of DNA to be considered a molecular clock. Be sure to discuss the importance of neutral muta
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  <span>Neutral mutations are neither harmful nor beneficial. 

Therefore, they are invisible to natural selection. (Since they neither improve nor worsen one individual's chances of survival and reproduction over another.) 

However neutral mutations can still spread into the population by just random replications and matings. This is called genetic drift. 

In other words, they are 'silent'. They are mutations that exist and propagate in populations, but seem to have no effect at all. 

The reason they can become important to evolution is that a day can come when they *do* have an effect. In other words, even though an individual mutation may have no immediate effect on survival or reproduction, a *combination* of neutral mutations may provide some new benefit or harm ... at which point natural selection *will* act on that combination. 
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I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
6 0
3 years ago
The muscles found in the front of your thighs are known as what?
pochemuha
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6 0
3 years ago
PLS HELP
KengaRu [80]

Answer:

1. cell walls tend to be more rigid than the cell membrane

Explanation:

Cell walls are called 'walls' for a reason (:

5 0
3 years ago
How does DNA analysis help scientists better understand evolution
SpyIntel [72]
The scientist see the transmission of DNA in Genes
7 0
2 years ago
Label the animal cell diagram given below
diamong [38]

Answer:

1. mitochondria  

2. centrioles

3. lysosome

4. cytoplasm (cytosol)

5. nucleolus  

6. nuclear envelope

7. chromosomes

8. cilia

9. Rough endoplasmic reticulum

10. Golgi apparatus  

11. citoesqueleton  

12. vesicles

13. ribosomes

14. smooth endoplasmic reticulum

15. cell membrane  

Explanation:

Mitochondria are the energy centers of the cell that work to produce ATP. Centrioles are organelles composed of tubulin protein that organize microtubules that serve as the cell's skeletal system. Lysosomes are vesicles that contain hydrolytic enzymes. The cytosol is a thick solution inside the cell which is enclosed by the cell membrane. The nucleolus is an organelle inside the cell nucleus involved in the transcription of ribosomal RNAs. The nuclear envelope is a membrane that surrounds the cell nucleus (in eukaryotic organisms). Chromosomes are linear molecules composed of chromatin (DNA + histone proteins) which contain the genetic material of the cells. The cilia are organelles found on eukaryotic cells involved in the movement of the cell. The rough endoplasmic reticulum is an organelle whose function is the processing of proteins synthesized in the ribosomes, while the smooth endoplasmic reticulum functions in lipid synthesis. The Golgi apparatus is an organelle involved in transporting and packaging proteins and lipids. The cytoskeleton is a dynamic network of protein filaments that act as the skeleton of the cells. Vesicles are membrane-bound structures that transport substances in the cell. The cell membrane is a lipid bilayer that acts to transport nutrients into the cell and waste products out of the cell.

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2 years ago
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