Answer:B
Explanation: because having one dominant allele is all the child needs to have brown eyes
What viral disease now thought to only exist inside a laboratory caused the death of many American Indians after europeans arrived in north American?
smallpox
No, it's not stamen is a male part the actual answer is A:carpel
<h2>A
dvantage of Microbes </h2>
Explanation:
Microbes
- <em>Microbes are all around us</em>, making life conceivable through <em>symbiotic connections</em>.
- In humans, useful microbes help assimilation and help prevent invasion by <em>harmful microbes</em>
- Microbes are used to create <em>proteins for industries</em>. A few enterprises likewise<em> utilize the microorganisms</em>
<em>Three kinds of human environment interaction</em>
- The manner in which individuals depend upon the <em>earth for food, water, timber, gaseous petrol etc</em>
- The way individuals adaption the earth to satisfy their own needs
- The manner in which environment adjust the earth positively or <em>negatively like drilling holes, building dams</em>
Answer:
1. 25% percent of daughter molecules are composed of hybrid DNA after 3 generations
2. 0% of daughter molecules would be composed of hybrid DNA if DNA exhibited conservative replication
Explanation:
1. According to semi conservative model of replication, the two DNA strands separate during replication and each gives rise to a new DNA strand. So in a newly synthesised DNA molecule one strand is old and one stand is new.
Here, the medium contained 15N so all DNA molecules had 15N in beginning. Then they were transferred to 14N medium. After first round of replication all the molecules will be 15N14N hybrid since 14N will be used now for replication. After second round of replication 50% of molecules will be 14N14N and other 50% will be hybrid. After third round of replication, 75% molecules will be 14N14N and 25% will be hybrid.
2. According to conservative model of replication, parental DNA strands stay together after replication so a newly synthesised DNA molecule will have both new strands. In this case, a hybrid will never be formed since the 15N15N strand will always remain together and all the subsequent DNA molecules will have 14N14N composition.