Answer:
Frequency of the allele "r"causing the disease on Tristan da Cunha
%
Frequency of the allele "r"causing the disease in the original population of 15 colonists 
%
Explanation:
Frequency of the allele "r"causing the disease on Tristan da Cunha
Given -
Out of 240 descendants on the island, 4 had retinitis pigmentosa (rr).
As per Hardy Weinberg's equllibrium equation
The frequecy of recessive individual in a given population is represented by 
And q represents the frequency of allele r
So, in this case q is equal to
%
Frequency of the allele "r"causing the disease in the original population of 15 colonists
As it is given in the question statement , the frequency of allele "r"causing the disease in the original population of 15 colonists is ten times the frequency of the allele "r"causing the disease on Tristan da Cunha
i.e
%
The right option is a. variations.
Variations are the differences between the individual organisms of the same species which is as a result of genetic differences or the influence of environmental factors on the expression of the genetic abilities. Variation may be expressed in behavior, physical appearance, learning, and metabolism. The two types of variations are somatic variation and germinal variation.
Question 1
A. They are both unicellular
Question 2
B. there are three types of cells, prokaryotic, eukaryotic plant, and eukaryotic animal.
Easy ribosomes I hope this helps a lot
Answer:
Nucleus: an organelle that is in most eukaryotic cells that contains genetic material for the organism
Ribosome: particles consisting of RNA and proteins that perform protein synthesis
Endoplasmic Reticulum: a network of membranous tubules within the cytoplasm that has ribosomes connected to them, involved in protein and lipid synthesis
Golgi Apparatus: a complex of vesicles and folded membranes within the cytoplasm, involved in secretion and intracellular transport
I hope this helps you!
