Phages are a positive use of viruses
Answer:
1. hydrogen; 2
2. it means two strands of DNA twisted around each other like a winding staircase
Answer:
CO2 enters the stomata during the day when they are open for photosynthesis. In exchange, O2 exits the stomata. While the stomata are open, there is a risk of water loss resulting in wilting and maybe death. The stomata help to conserve water at night while they are closed. Also, their waxy covering “cuticle” helps minimize water loss. On a very hot day, the stomata May close to preserve water but it comes with a cost, because if they close, photosynthesis slows down.
Explanation:
A
researcher was performing a test to check the effect of induced point
mutation. But the experimental mouse could not survive. The reason
for this is a lethal mutation. This is a mutation in which the
effects can result in the death of an organism carrying the mutation.
It is also known as lethal factor or lethal gene.
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Answer: To get rid of the week and let their kids not be weak.
Explanation:
