Answer:
it affects the hardness of the shells because calcium has a high reactivity which causes the shell to be hard
Explanation:
<span> descended from land animals</span>. Scientists believed that whales have evolved 50 million years ago from land dwelling ancestors who feed on fish from nearby sea. According to unearthed fossils, the early whale's body was more adapted to land but its relatives are more suited to live in water.
Answer:
Sound waves are refracted when they enter water after traveling through the air.
Explanation:
Answer:
Homozygous recessive
Explanation:
The parents of the individual displaying the sickle cell anemia (SS) are phenotypically normal parents meaning, both parents are carriers of the (AS) gene which is a recessive trait for sickle cell anemia.
The individual took up the SS allele from both parents which makes him/her homozygous recessive. An individual is said to be homozygous recessive if that individual carries two copies of the same recessive allele.
Homozygous dominant is when an individual carries two copies of the same dominant allele (e.g AA).
Answer:
about 50
Explanation:
U.S.A, Britain, China , Soviet Union and France and about 50 other states came together to draw a charter on 24 October 1945, at San Francisco in U.S.A.
