Explanation:
Lateral is from the side; medial is towards the midline (often from a sagittal section); dorsal is looking from above; and ventral is looking from below. Brain Stem: pons, medulla, spinal cord.
There are four phyla or categories of fish, Hagfish, lampreys, cartilaginous and bonyfish.
D) differences between species and their ancestors
This is because of the adaptive mechanism and mutations the organisms have to respond to. <span>Adaptation processes occur to help species survive and thrive in the ecological balance of life. Structural adaptations are physical features of an organism that adapted through time. An example of this are the bills of a bird and the fur of bears that they generally need for their survival; birds for hunting, and bears to protect them from low climate areas.</span>
The eardrum is a thin flap of skin that is stretched tight like a drum and vibrates when sound hits it.
