Answer:
Cleavage is a process in which cell is divided into several parts without increasing in size. There are 4 stages of cleavage i. e. 2-cell, 4-cell, 8-cell and 16 cell stages. 2 cell embryo cleavage occurs after 30 hours of fertilization. 4 cell embryo cleavage occurs after 48 hours. 6 cell embryo cleavage occurs on third day of fertilization. 8 cell embryo cleavage occurs on fourth day of fertilization and more than 100 cells are formed.
- TGA (opal)
Answer:
Explained below
Explanation:
A mutation in a gene that results in total loss of the normal function of the gene product encoded by that gene, resulting in a Null phenotype.
Changes in DNA sequence are termed as nonsense mutation that introduce a stop codon, resulting in a non functional protein. This terminology results stop codons have also worked as nonsense codons.
There are three different stop codon-
In RNA
- UAG (amber)
- UAA (ochre)
- UGA (opal)
In DNA
- TAG (amber)
- TAA (ochre)
- TGA (opal)
The two conditions are: high blood pressure and diabetes. High blood pressures causes damage to the kidneys of the mother and subsequently affect her pregnancy due to increased chances of pre-eclampsia. High blood sugars also affect pregnancy due to abrupt abnormal levels of blood sugars and lack of that can cause birth defects.
Answer:
The circulatory system delivers oxygen and nutrients to cells and takes away wastes. The heart pumps oxygenated and deoxygenated blood on different sides. The types of blood vessels include arteries, capillaries and veins.
Explanation:
It depends on what is wrong with the dam that's causing the problems for the fish. If the problem is pollution, you could take the weekend off to clean the dam. If the problem is too many predators, you could call an agency to kill/move the predators depending on what the predators are.
ex- animal control
