Answer:
Explanation:
Possible Essays for Life Science:
1. "Explain four management strategies to improve the quality of drinking water. Uncle Two sources of water pollution and Two effect of water pollution on human health.
"
2. "Eutrophication is one of most important water quality problem South Africa. Describe Eutrophication, what causes it and how it affects water quality."
3. "Describe the significance of DNA replication and meiosis and how the foetus is protected and nourished in the uterus."
4. "Describe how meiosis contribute to genetic variation and how
abnormal meiosis leaf to down syndrome and polyploidy. Also
describe advantages of polyploidy in agriculture.
"
Answer:
they form to combine an organ system
Answer: The maximum number of amino acids that could be coded is 2
Explanation:
- A codon in this microorganism is 2 bases instead of 3 bases .
- In order to encode a protein a sequence requires a start and stop codon
- If you assume no start codon: then only 2 bases would make up the stop codon.
- This leaves 4 bases which is 2 codons. This would encode 2 amino acids.
- If you assume a start and stop codon, then each codon would be allocated 2 base pairs each = 4 base pairs
- This only leaves 2 base pairs, a single codon which would only code for 1 amino acid
a. parsimony; simplest; fewest
When selecting among multiple possible phylogenetic trees that fit our data, we commonly use the principle of <u>parsimony</u>, which means we choose the <u>simplest</u> possible hypothesis. In phylogenetic analysis, that means selecting the tree that represents the <u>fewest</u> evolutionary changes or mutations.
Explanation:
Phylogeny describes the evolutionary history of on organism or group of organisms.
A phylogenetic tree structure is used to describe the relationship between various organisms which have originated from common ancestors.
The Principle of Parsimony is best applied while constructing phylogenetic tree.
This principle emphasizes on simple observations on a phylogeny which requires only few changes or variations which explain for the difference between the phylogenic sequences.
This tree structure will only have few specific genetic variations or mutations or evolutionary changes which took place through new appearance of a trait or disappearance of an existing trait.
