Answer:
C
Explanation:
When researching on the lineage of 2 animals from a common ancestor, one can deduce it accurately from DNA samples and various bodily characteristics from the body of the 2 animals in comparison to the common ancestor.
A) Strands of DNA allows for scientist to deduce the percentage similarity between 2 animals. The more similar means that the closer the relatedness is between 2 species.
B) Bones and muscle structure gives one a rough gauge on similarity of both organisms. E.g. Compare human bone, muscle to chimpanzee bone muscle.
C) Comparison of food items is the worst methods as different species may feed on different types of food due to natural selection. E.g. Finch bird example on the galapegos island or sth.
D) growth of embryos of similar animals would have similar developmental stages and changes that is quite distinct to each species, allowing one to deduce the closeness of the 2 animals to a common ancestor.
Answer:
Through different studies scientist have quantified the amount of energy that moves to the next trophic level. Most of the energy is used for metabolic processes and released as heat to the environment.
The amount of energy left for the next level is around 10%, if a herbivore takes 1,OOO Kilojoules the energy left for the next level would be around 100 Kilojoules, this explains why you cannot find a food chain with more than 7-8 levels (ocean) on land is usually between 4-6 levels.
As you didn't state the possible answers I am acting on previous knowlage so don't hate me if its wrong. I would have to say acetlyne.
We need more information on this, specifically the shape of the room. If it's a rectangle, the area is 12m.