Decomposers are like the housekeepers of an ecosystem. Without them, dead plants and animals would keep piling up with the nutrients the soil needs trapped inside. Decomposers clean up the dead material by processing it and returning the nutrients to the soil for producers.
Answer:
While researchers have discovered that there are an excessive number of receptor sites for dopamine, it is not the only neurotransmitter involved in schizophrenia.
Explanation:
Answer:
The commensal relationship between the sharks and remoras can be described as although remoras consume parasites, sharks with remoras show no better health or growth than sharks without remoras.
Explanation:
A commensal relationship refers to a relationship where two or more organisms in a habitat neither benefit or harm each other.
- The second option infers that the remoras harm the sharks. This is a parasitic relationship.
- The third option infers that the sharks are harmed by the remoras because the sharks depend on something that the remoras are limiting. This is also a parasitic relationship.
- The fourth option infers a commensal relationship, but falsely describes it. The relationship described by this option is a parasitic relationship (one benefits, the other does not).
Therefore, the answer is the first option: Although remoras consume parasites, sharks with remoras show no better health or growth than sharks without remoras.
Answer:
The radially symmetrical deuterostome invertebrate most closely related to chordates is the echinoderm.
Explanation:
Options for this question are:
- <em>Annelid.</em>
- <em>Echinoderm.</em>
- <em>Arthropod.</em>
- <em>Mollusk.</em>
Echinoderms, like the starfish, are a phylum of organisms derived from deusterotomates, in whose embryonic development the anus is formed first, and characterized by their pentaradial symmetry and the existence of an internal skeleton. Deuterostomy establishes a link between the echinoderms and the chordates, and the possibility that they are both descended from a common ancestor.
The relationship between invertebrates, such as echinoderms, and vertebrate organisms has been studied, establishing that hemicordates are the link that links both types of organisms.
