Register, ask, and answer questions to earn more points and privileges. Some features are disabled for users with few points.
Adaptations of the guard cells to their function include;Have chloroplast (with chlorophyll) to photosynthesize.Thicker inner cell walls than outer wall to (allow for curvature to) form stoma.Bean shaped to allow formation of stoma.
Aspects of light important in photosynthesis are;Light intensityLight durationLight wavelength/quality
Structural adaptation of a mammalian eye to it's function;Has sclera/sclerotic layer that contains inelastic (collagen) fibres to protect/maintain shape of the eye.Cornea is transparent to allow light to pass through or curved to reflect light toward retina.Conjuctiva, (thin) epithelium to protect the cornea.Has choroid which is rich in blood vessels/highly vascularized to supply the retina/eye with nutrients/ oxygen/remove metabolic waste.Has lens that is transparent to allow light to pass through.Iris has redial and circular muscles to alter the size of the pupil/control amount of light entering the eye.Retina contains cones and rods(photoreceptors) to perceive light/where the image is focused/formed.Has optic nerve sensory neurons/nerve cells that transmit impulses to the brain.Fovea has numerous cones (only) for accurate vision/high visual acuity.Pupils a hole/aperture/opening on the iris that lets in light.
Adaptation of lenticels for gaseous exchange include;Cells are loosely arranged to facilitate air circulation.Cells have moist surfaces to dissolve respiratory gases.