Answer:
Grafting can be defined as a surgical procedure that involves the removal of skin from area of the body to another part of the body in the same person or another person.
It is done in case of burns or injury. Grafting can be classified into following types.
Autograft: The donor and the recipient are from the same individual.
Allograft can be defined implanting tissue or organ from another individual of same species.
Isograft can be defined as implanting tissue or organ from genetically identical individual.
Xenograft can be defined as implantation of tissue or organ from different species.
Answer:
1. 20 chromosomes
2. 10 chromosomes
3. 10 chromosomes
Explanation:
1. The process of mitosis results in the two daughter cells from the same parental cell with exactly the same genetic material. Thus the two cells contain the same number of chromosomes as the parent cell. Therefore if a cell with 20 chromosomes undergoes mitosis will result in the 20 chromosomes.
2. During meiosis I two daughter cells are formed with different ploidy levels as the number of the chromosome reduces to half. Therefore the cell with 20 chromosomes results in two cells with 10 chromosomes.
3. During meiosis II, the two daughter cells formed from meiosis I result in the formation of two more daughter cells with an exact number of chromosome number that is 10 chromosomes.
<span>This hyperpolarization is due to the exiting of potassium ions or the influx of chloride ions through the channels in the neuron. During this time, the neuron enters a refractory period (approximately 2ms), during which an action potential is unable to be transmitted. After this timeframe, the neuron resets to around -70mV and the cell becomes able to re-transmit an action potential.</span>
<span>C. Phagocytosis is the process that the amoeba is exhibiting.</span>
Answer:
Sharks, in their basal form have been on Earth for hundreds of millions of years. They were the first to develop a stream-like, torpedo shaped body and created a niche for themselves. Their aerodynamic body shape has evolved to allow for efficient and dynamic movement in water. Having a cartilage instead of bones allowed them to grow large and still be relatively light and buoyant . After they've evolved flexible, protruding jaws, there wasn't much to change. They were able to adapt and exploit all the water habitats as the world was changing.
Explanation: