<span>A group of cnidarians that provide food and shelter for many kinds of animals are the ( </span>D. Corals )
I would agree with your answer of C. As there would need to be calcium to start with and they seem to come from the sarcoplasmic reticulum
<span>Due to the fact that horses and zebras can be bred to produce any offspring means that they belong to the same genus (Equus). However the offspring that comes about as a result of this cross breeding (zebroid/zorse) is not a fertile offspring. From these results we can conclude that the zebra and the horse are classified into different species. A horse has 64 chromosomes while a zebra has 46 or 32 chromosomes depending on the species. Their offspring often ends up having 54 chromosomes. This difference in chromosomes dictates that the female offspring not sufficiently fertile and the male sterile.</span>
Answer: The correct option is D, because a person having sickle cell anemia must be homozygous for the trait.
Explanation: Sickle cell disease is autosomal inherited disease. In this disease the shape of red blood cell change from round to crescent shape, as a result it become unable to carry oxygen because it can not pass through capillaries. When
Glutamine amino acid is replaced by
Valine the shape of hemoglobin become sickle shaped.
Genetics of Sickle cell anemia:
This disease appears in homozygous recessive from. Genes for sickle cell is represented by
"S" while for normal it is represented by capital
"A". If a carrier man marry a carrier woman then 50% of child will be sickle celled, 25% will be normal and 25% will be carrier for disease as shown in the figure