The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).
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Answer:
Only about half the energy available in an organism is transferred to the consumer that eats it.
Explanation:
In an ecosystem energy flows in a linear fashion or in one direction. Energy from sun is fixed into chemical energy by green plants. The stored chemical energy from green plants is transferred to the herbivores then to carnivores who eat herbivores. During energy transfer, a part of energy is used for the growth and development of the organism and large amount of energy is released as heat into the environment and only 10 % of the energy stored in the organisms at each trophic level is transferred as a food for the next trophic level to support life. This is called ‘10 % law of energy transfer’.
Answer:
Co-evolution
best describes the type of relationship shown below
Explanation:
Co evolution can also be termed as the common adaptation of two or more species, their genes, traits and the as a group or pair of organs. Due to the same pressure on both the species it occurs, when they undergo same natural selection. The humming bird is also the same example, which has been adapted to the various shapes of the beaks that are used to extract the nectar and flowers are evolved to generate tasty nectar for these humming bird.
Cells in an organism can develop in different ways to perform different tasks.