Trusted by millions of Kenyans
LoginRegister
Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Browse exam papers
Or go directly to:
Class notes Holiday assignments Topical questions Other resources

Describe the adaptations of a mammalian eye to its functions.

Describe the adaptations of a mammalian eye to its functions.

Answers

Francis
- Conjunctiva is thin / transparent/ tough; to allow light to pass through/protect the eye;
- Sclerotic layer is made up of (collagen) fibres/fibrous; it maintains shape of eyeball/protects the eye;
- Cornea is transparent/curved; thus refracts light rays/ allows light to pass through;
- Choroid (is a layer of a tissue) has black/dark pigments; prevent internal reflections of light in the eye;
- Contains blood vessels; that supply oxygen / nutrients/ ( removes the metabolic) waste from the eye
- Retina has rods / cones; for low vision / for colour/ bright light;
- Yellow spot/Forea centralis/Fovea; has highest concentration of cones; for accurate/visual acuity;
- Blind spot has no cones and rods; place where optic nerve leaves /enters the eye;
- Optic nerve has sensory nerve fibres/ neurons; for transmission of impulse to the brain ( for interpretation)
- Lens is biconvex / made up of elastic/transparent material; adjust to focus far or near objects/ allows light rays to pass through / for refraction of light rays;
franco crick answered the question on January 29, 2018 at 10:06

Answer Attachments

Next: What chemical compound is found in cassava 'root' present at the center making it unrawful.

Previous: Describe the adaptations of a mammalian ear to its functions.

View more Biology Questions and Answers  |  Return to Questions Index

Exams With Marking Schemes

Related Questions