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topjm [15]
3 years ago
8

Pollen cores are commonly used to characterise previous changes to vegetation and climate. Explain why pollen is useful for this

purpose, giving examples.
Geography
1 answer:
grin007 [14]3 years ago
7 0

Answer:

Explanation:

Pollen shows a particular type of plant species and a particular type of environmental condition or habitat condition under which it was living. This type of study of pollen and spores called palynological study.

This type of study comes under the microfossil study, and now it is a very trending topic in determining the paleo-climate. Microfossil study is having more benefits because here we can do both qualitative and quantitative study.

Generally, nowadays we are doing a pollen study to know the glacial and inter glacial events. Because we know under different climatic condition different types of plant will grow. After their death, their pollen's get preserved under sediments and now we are analyzing them to construct the paleo-environment. But remember pollen preservation requires a very quick burial of sediments otherwise they are so susceptible that they can't be preserved .

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3 years ago
Predict the product sequence for DNA replication,transcription and translation process using DNA template of TATAATGAAGTTCCGAGGA
Rina8888 [55]

Answer:

  • Replication: 3' ATATTACTTCAAGGCTCCTATC 5'
  • Transcription: 3' AUAUUACUUCAAGGCUCCUAUC 5'
  • Translation: AUA UUA CUU CAA GGC UCC UAU

Explanation:

First of all you need to know that DNA is formed by nitrogenous bases represented by letters (ATCG). The sequence that these letters present in the DNA are the basis for the establishment of the processes of replication, transition and translation. This is because these bases complement each other and make connections between themselves as follows:

  • Adenine (A) is complementary and makes connections with Timine (T) in DNA and with Uracil (U) in DNA and vice versa.
  • Guanine (G) connects and is complemented by cytosine (C) and vice versa.

Based on that, we can use the sequence 5'TATAATGAAGTTCCGAGGATAG-3 as a model for DNA replication we can say that the sequence of the new DNA strand would be 3 'ATATTACTTCAAGGCTCCTATC 5', since the new strand is built based on the complementarity of the bases nitrogenous.

This same sequence, when used in replication, for the formation of an RNA molecule, would also use the base complementarity, forming an RNA molecule with the sequence 3 'AUAUUACUUCAAGGCUCCUAUC 5'.

The translation, in turn, would use the RNA sequence to form the amino acids that would form a protein. Each amino acid would be formed by the joining of three nitrogenous bases of the RNA sequence, thus the protein would be formed by the amino acids AUA UUA CUU CAA GGC UCC UAU

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