The vertebral column, when seen from the side, has 4 curves: 2 convex curves (cervical and lumbar curves) and 2 concave (thoracic and sacral curves). This curves are the feature of the skeleton that allow a child to maintain balance in the upright position eventually.
When we are born we have a single concave curve throughout the whole vertebral column but, as we grow, still in the early months as we try to hold our head, the cervical curve starts to develop, and later, as we try to sit up, stand up, and walk, the lumbar curve aslo starts to develop. In few years we have all curves fully developed.
Answer: When the ball reaches the highest point and stops briefly.
Explanation: All thrown projectiles make a parabola, the peak of the parabola will have the greatest gravitational potential energy.
<span>Flagellates have long flagella, or tails. ...Other protists have what are called transient pseudopodia, which are like temporary feet. ...The ciliates are protists that move by using cilia. ...<span>The sporozoans are protists that produce spores, such as the toxoplasma.</span></span>
Answer:
The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior.
I believe the answer is A
