Unlike the younger Earth, we have a thick atmosphere full of millions of chemicals that keep the oxygen we breath in, and protects us from space junk from colliding with us. Also, the earth we know today isn't insanely hot. The younger Earth had a surface temperature that was not possible for sustaining life. But now, it's just right!
Also, we have vast salty oceans. The younger Earth had a kind of ocean, but these were made of molten metals and other rocks.
I hope this helps!! :)
Answer:
The correct answer is: Variation in nucleotide sequences are located in those regions of the gene which do not affect the sequence of the protein due to genetic code degeneracy.
Explanation:
- Proteins are encoded from the genes located in the chromosomes.
- The genes are made up of the heritable DNA (Deoxyribonucleic Acid) sequences.
- These genes are transcribed by the enzyme called RNA polymerase into mRNA (messenger Ribonucleic Acid) sequences in the nucleus.
- The mRNA is then translated into protein sequences by the Ribosome in the cytoplasm or the RER (Rough Endoplasmic Reticulum).
- The Ribosome reads the mRNA code in form of triplets, that is, three consecutive nucleotide are read as a single code that encode for a single amino acid. This triplet code that responsible for coding for a single amino acid is called a Codon.
- The Codons are degenerate in nature. This means that among the three nucleotide in a codon the first two nucleotide is specific for a particular amino acid. The third nucleotide is "wobble" in nature. This means that whatever may be the nucleotide in the third position it will not change the amino acid coded by the first two nucleotide.
- Hence, a single amino acid is coded by more than one codon.
- So, gene sequences showing variation in the wobble nucleotide position will encode for the same protein.
Answer:
Both A and C is the right
The answer is A
If not then its C
Answer:
Answer is option B, i.e. ecological succession.
Explanation:
Ecological succession can be understood as a slow process of change that takes place in the ecology or ecosystem over a given period of time. One species takes over the other species naturally and gradually with changing condition that falls favorable for the former. Here, in the above mentioned case, the Raspberry plants took over the habitat of Pine trees after they were knocked down by the winds. With the passage of time and favorable conditions for the pine seedling, they took over the plantation area again.