A Russian botanist and biochemist named Alexander Oparin came up with the idea that the first cells in existence might have formed from liquid droplet protocells. He assumes that the protocell can act naturally and form a container without membranes that is concentrated in chemicals
Mutation are two types somatic and germ cell mutation...as there is mutation in germ cell it will alter the normal behavior and produce variation !
random fertilization also causes variation as different setup of genes meets with another different...so chances of variation increases !
and third crossing over is in meiosis when chiasmata forms....so in this two homologous chromosome attach to each other and on separation ... some part exchange so leads to variation !
Answer:
C
Explanation:
The load is the lightbulb just learnt this 1 week ago
Answer:
B
Explanation:
Guanine and Cytosine pair together. So, if 32 percent is guanine, then 32 percent should also be cytosine. This is a total of 64 percent. The remaining 36 percent is split between thymine and adenine. So, Thymine will have half of 36 percent which is 18 percent.
