Question 1
What is active transport.
Answer
- Movement of molecules against concentration gradient
Question 2.
Give three adaptations of animal dispersed fruits and seeds
Answer
i) Hooks on the ovary walls or on the calyx
ii) Succulent/brightly coloured and scented
iii) Seed coats of some are hard and resistant to digestive enzymes so that they pass through the gut undigested
ii) Succulent/brightly coloured and scented
iii) Seed coats of some are hard and resistant to digestive enzymes so that they pass through the gut undigested
Question 3
State three functions of golgi apparatus
Answer
- Packaging of synthesized material;
- Secretion of packaged material; eg glycoprotein etc.
- Transport of the packaged material;
- Secretion of packaged material; eg glycoprotein etc.
- Transport of the packaged material;
Question 4
- What is the difference between Darwinian and Lamarakian theories of evolution
- Distinguish between convergent and divergent evolution
Answer
- In Darwinian theory, environment determines the changes and which organisms to survive and reproduce or perish; while in Larmakian theory, organisms change in order to survive in their environment; Alt; In Darwinian, environment only determines the direction evolution will take while in Larmakian environment determines variation
- Divergent evolution – one from of a structure gives rise to various different forms;
convergent evolution – structures have different embryonic origins but are evolved to perform similar functions
Question 5
State the characteristics that can separate the following organisms into respective classes;Millipedes, tsetsefly and spider
Answer
- Body parts / Division;
- Number of limbs/ legs;
- Body segment
- Number of limbs/ legs;
- Body segment