Approximately how many species have biologists identifiec so far? 3 million extant 3 million living and fossil species 2 million extant species 2 million extinct species 2 million living and fossil species

A fuel molecule which contains a glycerol backbone and three fatty acids would be called: a triglyceride a cholesterol a tertiary protein a carbohydrate

Even though it is not funny, the bone in the upper portion of the arm is called: humerus radius julna

This bone is commonly referred to as the tailbone. cranium sternum coccyx sacrum

According to class what specialized organ do male mosquitoes use to detect wing vibrations of females? Tympanic organs Chordotonal organs Johnston's Organ Setae

What is the role of enzymes? Concentrate products of chemical reactions. Speed up the rate of chemical reactions. Combine with smaller molecules to make larger ones. Act as substrates for chemical reactions.

The esophagus differs from the standard arrangement of the alimentary canal in that it has __ gastric glands stratified squamous epithelium Brunner's glands villi

Herbivores which only consume plants Secondary Consumers Primary Consumers

Which of the following is a vital function of the skin? The skin converts modified epidermal cholesterol to vitamin D. The skin absorbs vitamin C so that the skin will not be subject to diseases. The skin aids in desiccation The skin aids in the transport of materials throughout the body. The cells of the epidermis store glucose as glycogen for energy.

When our sensory receptors notice a specific stimuli, they convert that energy to an action potential and send that to the central nervous system. What is this process called? Sensation Perception Transduction Absolute threshold

The region of the brain stem positioned closest to the spinal cord is the: Medulla oblongata Midbrain Pons