d. Movement of sodium and potassium across the cell membrane against

1.

• Movement of sodium and potassium across the cell membrane against

their concentration gradients.

2.

• A hypothesis

3.

• urea

4.

• Carbon has an atomic number of 6. Which of the following is true about

isotope c-12?

• C-12 possesses 6 neutrons and 6 protons in its nucleus
• C-12 possesses 7neutrons and 5 protons in its nucleus
• C-12 possesses 7 neutrons and 5 protons in its nucleus
• C-12 possesses 6 neutrons and 6 protons in its nucleus
• Which of the following best describes adaptive immunity?
• The body barrier defences,such as mucous membranes and secretions
• A response to specific traits of specific pathogens.
• The initiation of the inflammatory response
• The initiation of internal defences, such as phagocytes and natural killer

cells.

• The body cavity is subdivided into the thoracic and the

abdominopelvic cavities

• Dorsal

Efferent arteriole, higher

• Ventral
• Cranial
• Vertebral
• The superior thoracic cavity is separated from the rest of the ventral cavity

by the

• Vertebral
• Thoracic
• lungs
• Diaphragm
• Which of the following vessels carries oxygenated blood?
• pulmonary vein
• Inferior Vena cava
• Pulmonary Artery
• Superior Vena Cava
• Which of the following is a property of water?
• Water is made up of one molecule of hydrogen and two molecules of

oxygen

• Water dissolves polar and ionic compounds
• Solid water is more dense than liquid water
• Water requires less heat than ethanol to raise its temperature.
• A student investigating the importance of wavelengths above and below

the visible spectrum for photosynthesis sets up an experiment as follows over a 2-month period, all with illumination at 1 meter distance from plants grown with the same soil and watering conditions.

• Arabidopsis plants exposed to ultraviolet light (UV)
• Arabidopsis plants exposed to infrared light (IR)
• Arabidopsis plants exposed to white light

At the end of the experiment, she finds that the IR treated plants are scorched, the UV treated plants have wilted, but the white light-treated plants are growing normally.

Which of the following statements is most likely to be correct?