Answer: option c
Sieve tubes element are use to transport sugars through out the plants.
Explanation:
Sieve tubes element are elongated and specialised living cells found in the phloem of a flowetlring plant.
They help the phloem to function very well.
Their main function is to transport carbohydrates especially sucrose in the plants. E.g transporting of sucrose from leaves to the fruits.
Answer:
The correct answer is option A) "All living organisms use energy".
Explanation:
Even though living being use different strategies to obtain energy, an unifying principle among them is that all living organisms use energy to live. Plant use photosynthesis, which allows them to use sunlight, carbon dioxide and water to obtain energy. This classifies plant as producers, whereas animals that consume plants are primary consumers, animals that consume the animals that consume plants are second consumers, and so on.
The answer is A. Oligotrophic lakes are clear and hence
have little vegetation in them (hence no net primary production) that
could initiate the process of eutrophication. Eutrophication is brought about when bacteria
break down the high amount of organic matter hence reduce the oxygen supply in
the waters.