Answer: d. exoskeletons are external to the soft tissues, and endoskeletons are internal
Explanation:
The skeleton can be define as the body part of the living beings which act as a supporting structure which maintains the posture and provides the supporting framework to the body. The exoskeleton is the skeletal structure that protects the body from outside. It encloses within it the soft tissues and organs of the body. It is the characteristic feature of the invertebrates. It is the external feature of the body. It also provides protection against the predator. The endoskeleton is the skeletal structure which serves as a attachment point for the muscles. It is the internal feature of the body.
The optimum range seems most applicable,
Answer:
the mutations aren't heritable if they aren' in reproductive cells.
Hi!
Coral and zooxanthellae have a mutualistic relationship, where they both benefit. These organisms work together in order to benefit each other and their own survival.
The coral provides a safe protective place for the zooxanthellae, so they can perform photosynthesis. =)
