Answer: False
Explanation: because the Emperor Penguin live in Antarctica and the Galapagos Penguin is the only penguin that lives north of the Ecuador.
Answer:
Cytokinesis is the physical process of cell division, which divides the cytoplasm of a parental cell into two daughter cells.
Explanation:
The limitations of cell size are:
1) Surface area to volume ratio
2) Nucleo cytoplasmic ratio
3) Fragility of cell membrane
What are the cause of limitations on cell size?
The need for a surface area of sufficient area to allow the cells function→.
→If the surface area of cell increase volume increase to the cube of the linear increase.
→ Nuclie contains information needed for protein synthesis . Some cells reduce this limitation to increase the no. Of nucleus called multinucleated.
Examples are muscle cells.
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Answer:
The correct option is D. (Two back-to-back phospholipid layers with the polar heads facing out on both sides)
Explanation:
The plasma membrane creates a barrier between the interior part of the cell and the cytoplasm. It is consisting of proteins and phospholipids and bi-layered in nature. Phospholipids are known as the main component of the plasma membrane.
Phospholipids are composed of alcohol and fatty acids and they are arranged in a specific manner. Each phospholipid molecule contains a water-hating tail that is hydrophobic in nature and a water-loving head which is hydrophilic in nature and the polar heads face the outside.
Answer: B)
Explanation:
The glycoprotein and glycolipid carbohydrate chain forms the hydrogen
bond with water molecules to help stabilize the membrane structure.
When it comes to glycoproteins and glycolipids and their bond we can say that their carbohydrate chain is forming a hydrogen bond with water molecules that are surrounding the cell and thus. In this case, they are helping in the stabilization of membrane structure. They are used as receptor molecules.
