The Cambrian explosion was the asteroid impact near the Yucatan Peninsula that likely caused a mass extinction of dinosaurs and other species. the sudden diversification of animal life from simple organisms to all of the basic body types known today. the sudden appearance of dinosaurs in the fossil record during the Cambrian period. a sudden burst of change in the fossil record that is inconsistent with the central thesis of evolution.

The cervical region of the vertebral column is $a/an$ scoliotic curvature secondary curvature kyphotic curvature primary curvature Question 48 The pharyngeal constrictor muscles are derived from which arch(es)? Arch 1 Arch 3 Arch $4-6$ Arch 2 1 pts

An example of a highly vascular tissue is __ tissue. An example of a tissue that is not highly vascular is __ An example of a highly vascular tissue is __ tissue. An example of a tissue that is not highly vascular is __

In the context of negative feedback, if you eat yogurt, and your blood calcium rises Your body will release hormones to dissolve bone thus raising blood calcium levels Your body will release hormones to build bone thus removing calcium from the blood Your body will do nothing and allow blood calcium levels to stay high A None of these is correct

Functional Components of Neurons Dendrites in a neuron send outgoing signals to other cells. True or False True False

In pulmonary circulation, veins carry oxygen-rich blood. True False

The Golgi apparatus forms vesicles that contain hydrolytic enzymes, which function in intracellular digestion. These vesicles are called $\square $

Functions of Connective Tissue Cells Plasma cells produce the ground substance that forms the matrix of connective tissues. True or False True False

Properties of Skin Cells Nonkeratinized cells exfoliate from the surface of the skin. True or False True False

What two subunits combine to form the bacterial 70S ribosome? 40S and 60S 50S and 30S 20S and 80S 10S and 60S

Enzymes speed up chemical reactions by lowering activation energy. True False