Why Have Biologists Hypothesised That the First Land Plants Had

question 53

Multiple Choice

Why have biologists hypothesised that the first land plants had a low, sprawling growth habit?

• A) They were tied to the water for reproduction, thus needing to remain in close contact with the moist soil.
• B) The ancestors of land plants, green algae, lacked the structural support to stand erect in air.
• C) Land animals of that period were small and could not pollinate tall plants.
• D) There was less competition for space, so they simply spread out flat.

Distinguish between monocular and binocular cues for depth perception.

Identify the role of motion in perceiving depth, including motion parallax and optic flow.

Recognize the contributions of size, texture, and interposition as depth cues.

Demonstrate an understanding of perceptual constancy and how it maintains stable perceptions despite changes.

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Definitions:

Plasma Clearance

A measure of the rate at which a substance is removed from the blood by the kidneys or other organs.

Plasma Osmolarity

The concentration of solutes in the blood plasma, important for the regulation of water balance and blood pressure.

Glomerular Filtration Rate

A test used to check how well the kidneys are filtering blood, indicated by the rate of glomerular filtration.

Plasma Clearance

A measure of the rate at which a substance is removed from the blood by the kidneys, liver, or other organs.