Answer:
- Because soil has lost nutrients.
- To provide the right nutrients needed by a particular plant to grow.
Explanation:
Due to regulkar use of soil, the nutrients in the soil have been constantly used by the plants grown on it.
Due to this, soil has lost its value.
Application of fertilizer is one wey through which farmers artificially provide nutrients to the soil.
Therefore, application of fertilizers becomes neccessary for improved crop productivity.
Answer:
Scientists use the fossils around the new fossil to find its relative age.
Explanation:
13. Ear canal
14. Vibrates
15. Auditory ossicles (malleus, incus, stapes)
16. Cochlea
17. Auditory
18. Texture and temperature
19. CNS
Explanation:
First, think about which base pairs arise in complementary strands of DNA:
DNA → DNA
adenine → thymine (A → T)
thymine → adenine (T → A)
cytosine → guanine (C → G)
guanine → cytosine (G → C)
However, mRNA does not consist of the same four bases as DNA. While DNA has the ATCG nitrogenous bases, RNA replaces thymine with uracil, making its bases AUCG.
So, that means that whenever DNA has adenine, instead of pairing this with thymine, RNA will use uracil instead.
DNA → RNA
adenine → uracil (A → U)
thymine → adenine (T → A)
cytosine → guanine (C → G)
guanine → cytosine (G → C)
Giving us the corresponding sequence:
