<h3><u>Answer</u>;</h3>
Processes of carbon cycle are;
- Photosynthesis
- Respiration
- Decomposition
- Combustion of fossil fuels
<h3><u>Explanation</u>;</h3>
- Through photosynthesis carbon dioxide from the atmosphere is converted into plant material by plants.
- Organisms such as animals and animals carry out cellular respiration to generate energy and also release carbon dioxide that was trapped during photosynthesis.
- Some organisms undergo decomposition and carbon is stored as wood, soil carbon, sediments or converted to fossil fuels.
- Burning of fossil fuels releases carbon dioxide back to the atmosphere.
The plasma membrane and cell wall are two different structures. The cell wall is the outermost structure of plant cells, providing rigidity. The plasma membrane lies just inside the cell wall.
Answer:
The correct answer is b. recognizes foreign DNA sequences that have previously entered the cell and directs the Cas proteins to destroy them.
Explanation:
Clustered regularly interspaced short palindromic repeats (CRISPER) is the sequences of DNA found in the genome of prokaryotes and archaea. These sequences are added at a crisper locus in DNA by bacteria through capturing bacteriophage DNA during infection.
Then this sequence is used to detect a similar sequence of bacteriophage during subsequent infection and destroy them by Cas9 enzyme. Cas 9 enzyme uses a crisper sequence as a template to destroy similar phage DNA.
So the CRISPER Cas system provides an adaptive defense mechanism to bacteria against foreign DNA coming from bacteriophage. Therefore the correct answer is b.
