Sperm whales have vestigial hip bones, and a small percentage of sperm whales also have vestigial hind limbs. Which of the following statements best explains the presence
of these vestigial structures in sperm whales?
A. Sperm whales evolved from ancestors that walked on land.
B. Sperm whales are in the process of evolving into land mammals.
C. These structures are acquired by each individual sperm whale during its lifetime.
D. These structures resulted from sperm whales having a long period of embryonic
development

Sperm whales evolved from ancestors that walked on land.

Explanation:

A vestigial structure is a body part that is present in an organism, but serves no function  due to evolution over time. An example of a vestigial  structure would be a human's tail bone.

Sperm whales contain vestigial hip bones, meaning that the organisms once had legs. Therefore, the answer that is the most accurate is that sperm whales evolved from ancestors that walked on land.

a. The factor changing among groups = The color of the light

b. The independent variable in this experiment = Color of light

c.  The quantity measured at the end of the experiment = The height of the plant

d. The dependent variable is the height to which the plants grow

e. The control group is the Plant Group C, because they are subjected to normal light

f. The parts of the experiment kept constant are;

Temp

Humidity

Water Daily

Daily Light Exposure

g. The amount of nutrient available and atmospheric gases

h. The growth rate of plant is dependent on the color of the light in which the plant grows

Explanation: