Answer:
a. histones. is the correct answer.
Explanation:
In a nucleosome, the DNA is wrapped around eight histones proteins to create strong loops termed nucleosome.
A nucleosome is the structural subunit of the chromatin.
Chromatin is a fiber polymer of double-stranded DNA which is composed up of a nucleosome core. The nucleosome core is made of histone proteins
Each nucleosome is composed of DNA enclosed around eight histone proteins which are called histone octamer.
Answer:
Cones and rods in our eyes
Answer:
The mRNA molecule will be synthesized running in the 5' to 3' direction.
Explanation:
From the DNA sequence:
5'-ATCGTACCGTTA-3'
3'-TAGCATGGCAAT-5'
mRNA sequence is
5'-AUCGUACCGUUA-3'
Amino acid sequence will thus be:
Ileu-val-pro-leu.
Answer:
1. D (In population genetics, gene flow is the transfer of genetic material from one population to another.)
2. C (Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. It can also cause initially rare alleles to become much more frequent and even fixed. When there are few copies of an allele, the effect of genetic drift is larger, and when there are many copies the effect is smaller.).
3. A and also E (Individuals with inherited characteristics that allow them to best compete for limited resources will survive and have more offspring than those individuals with variations that are less able to compete. Because characteristics are inherited, these traits will be better represented in the next generation.)
4. D (Gene flow can increase fitness but if it happens in another environment, it decreases the adaptability. If alleles are advantageous, the offsprings' inheritance increases.
5. B (Mutations are the main source of alleles)
Answer:
A light pole
Explanation:
A light pole does not contain any areas in which an organism could inhabit
A hydrothermal vent contain many bacterias which can survive under those conditions, similar to an abandoned mine
The Kowloon Walled City can be considered an ecosystem only because within the City there may be many areas in which an organism could inhabit
