Fleas are tiny insects that you might find on your dog. Fleas bite their skin and suck their blood causing them to itch while the fleas get food and a warm home. This is an example of
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Commensalism

Predation

Parasitism

Mutualism

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

Which organelle breaks down sugar molecules that supply energy to the cell ?