"<span>Chelicerae" is the mouth appendage in which these venom glands of the spider are located. The correct option among all the options that are given in the question is the second option or option "B". The other options given in the question are incorrect. I hope that this answer has come to your help.</span>
As the vast Pangea continent broke apart due to tectonic
movements, the movement of animals was restricted to their continent hence gene flow
between populations was reduced. As the tectonic plates moved across latitudes, their climate
changed and consequently, the fauna on
the continents. This necessitated for speciation of the offspring population from parent
population so as to adapt to the
new habitats. Some animals were unable to adapt
while others such as the reptiles, adapted well.
Contraction of skeletal muscles against the lymph vessel
The lymph usually move in the body in its own vessel and travels from the interstitial spaces to the subclavian veins at the neck area. The lymphatic system does not have a heart to pump and move the fluid. The movement of lymph depends on the movements of the muscles and joints in the body. In this mechanism upward movement is possible. It will move towards the neck where it will be filtered and will go again into the subclavian veins.
