The right option is; -the single layer membrane surrounding the outside of the cell allows for the easy removal of waste
The cell membrane is a biological membrane that surrounds a cell and separates the contents of the cell from its external environment. The cell membrane is composed of lipids and proteins and its main function is to protect the cell from its surroundings. The cell membrane also controls the molecules that enter and leave cell.
Answer: Reptiles include snakes, turtles and lizards, while amphibians include toads, frogs and salamanders. One difference between reptiles and amphibians is their relationship with water.
Explanation:
Amphibians:
- Skin is smooth and highly porous.
- The webbed feet help them to swim.
- Their eggs are covered with gel.
Reptiles:
- Skin is dry, hard and scaly.
- They have limbs to facilitate running and swimming.
- Their eggs are covered with a hard protective covering.
The answer is B and that is the same reason that everything stays on the Earth because it has very strong gravity.
Pyramid biomass
<span>Pyramid biomass shows how energy are passed at
each tropics level and it is a graphical representation that shows the extents of
biomass per unit area at different tropic level with an ecological system. Also,
biomass is the food available for the next tropic level in a food chain and
they can be used as a source of renewable energy. </span>
1). secondary; physical and thermal and radiological
2). primary; chemical radiological
3). secondary; physical and biological
