Answer:E. Adenine and Guanine
Explanation:
They are double <u>double carbon- nitrogen rings with four nitrogen atoms</u> bases found in DNA and RNA. Purines always pair with pyrimidines(cytosine and thymine) to form a double helix structure.This precise paring ensured that the DNA has a complementary structure.
This paring of purines with pyrimidines is by hydrogen bonds. This is to ensure easily unwinding during replication, that is formation of new DNA molecules.
purines bases are also used for cell protein synthesis fro cell division.
-Cumulus
- Stratus
- Cirrus
As a little interesting fact: Nimbus
I hope this helps! :)
They need energy to produce oxygen
Cannot produce a child with Type O blood
Answer:
B. food production
Explanation:
In the example above described, salinity conditions (3%) completely prevented radicle development (0 mm). Salinity conditions may alter plant development by inhibiting the uptake of nitrogen, and by limiting water intake. Moreover, it has been shown that the excessive accumulation of chloride ions in plant cells may have toxic effects on plant growth, causing ionic stress and thus leading to nutrient deficiency.
