Photosynthesis and cellular respiration both somewhat involve each other.
Answer
I think the cause would be unprotected sex and well that would also be how its transmitted.
Explanation:

<h2><u>My </u><u>Answer</u></h2>
In humans, cells other than human sex cells, are diploid and have 23 pairs of chromosomes. Human sex cells (egg and sperm cells) contain a single set of chromosomes and are known as haploid.
I Hope it's Helps ╮(^▽^)╭
<h2>#CarryOnLearning</h2>
Answer:
To make food for the plant.
Explanation: