Answer is option A.
When organisms eat other organisms, energy is transferred from one organisms to other. According to 10% law of energy transfer, only 10% of the available energy gets transferred to next trophic level of organisms. In this question apex or top consumer have 500 to 1000 kilograms of biomass. To have 500 to 1000 kilograms of biomass at apex level, the producers in food chain must have much lager biomass than 1000 kilograms to support biomass of 500 to 1000 kilograms at apex consumers. It is because most of the energy is lost as heat during transfer of energy from one trophic level to another.
Answer:
The correct answer will be option B.
Explanation:
Plant cell shows distinguishing features from the animal cell which can be easily observed like:
1. Shape: Plant cell is usually rectangular while the animal cell is circular.
2. Membrane : Plant cell posses two layers- outer cell wall and inner plasma membrane while the animal cell only plasma membrane.
3. Vacuole: plant cell contains a single large vacuole whereas animal cell contains small vacuole if any.
4. Ribosomes: plant cell posses more free cytoplasmic ribosomes while animal cell contains more attached ribosomes.
On the basis of this, we can predict that James is preparing a plant cell with balloon shoeing large vacuole and marbles as ribosomes.
Thus, option B is the correct answer.
B they were domesticated shortly after
Answer:
3 main enviornmental problems are pollution, climate change, and deforestation
Explanation:
