Answer:
The researcher centred on the potential uses of biochar, charcoal primarily used for agricultural and to improve the quality of post mining sites.
A method called mountaintop removal was used by mining firms. This means that they remove rock and mineral deposits off the top of the mountain to gain access to within the coal seams. The resulting soil is infertile and strongly acidic. The compacted soil after mine proves harder to bring seed into the soil.
The researchers try to use biochar to help reforest the soil at the post-mining site. Before it was reseeded and replanted, they got permission to add a layer of biochar to a post-mining site. the team created “planting cells” of biochar‐enhanced soil on the post‐mining site and that showed improvment in the sapling growth.
Explanation:
All insects belong to the kingdom Animalia and more specifically to the C “phylum” Arthropoda.
Explanation:
Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring. The doctrine, proposed by the French naturalist Jean-Baptiste Lamarck in 1809, influenced evolutionary thought through most of the 19th century. Lamarckism was discredited by most geneticists after the 1930s, but certain of its ideas continued to be held in the Soviet Union into the mid-20th century.
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.
Ếch đồng (Hoplobatrachus rugulosus) là một loài ếch trong họ Dicroglossidae. Nó được tìm thấy ở Campuchia, Trung Quốc, Hồng Kông, Lào, Ma Cao, Malaysia, Myanmar, Philippines, Đài Loan, Thái Lan và Việt Nam. Môi trường sống tự nhiên của nó là đầm lầy nước ngọt, đầm lầy nước ngọt ngắt quãng, đất nông nghiệp, đất đồng cỏ, vườn nông thôn, vùng đô thị, ao, đầm nuôi trồng thủy sản, đào lộ thiên, đất tưới tiêu, đất nông nghiệp bị ngập lụt theo mùa, kênh và mương. Chúng sinh sản vào mùa xuân đến đầu mùa hè.