Devi is given 10 seeds each of different types, seed A and seed B. She wants to find out the dispersal method of both types of seed, seed A and seed B. She has the following materials:- 2 beakers containing 500ml of water- 2 trays of the same size- 2 dry towels of the same size- an electric fan- a metre ruler- stopwatchWith the materials available, write down the steps that Devi has to carry out in order to draw a conclusion at the end of her experiment that they are not dispersed by wind or water.(Note: You do not need to use all the materials given.)

Movement of seeds to a new location by wind is an example of:Group of answer choicesBiotic dispersalBallistic dispersalAbiotic dispersalMammal dispersal

Dandelion seeds each have an umbrella-like structure at their top. This structure allows the seeds to be carried by the wind.A scientist claims that this umbrella-like structure increases the dandelion plant’s reproductive success.Which observation would best support the scientist’s claim?Choose 1 answer:Choose 1 answer:(Choice A)   Dispersed seeds grow into plants that produce less pollen than non-dispersed seeds.ADispersed seeds grow into plants that produce less pollen than non-dispersed seeds.(Choice B)   Dispersed seeds are more likely than non-dispersed seeds to grow into new plants and survive.BDispersed seeds are more likely than non-dispersed seeds to grow into new plants and survive.(Choice C)   Dispersed seeds attract more flying pollinators than non-dispersed seeds.CDispersed seeds attract more flying pollinators than non-dispersed seeds.

Which of the following is a way that seeds are spread? A. moonlight B. mosquitoes C. sunshine D. explosion

A biologist collected seeds from 10 different plants, keeping all seeds under optimal conditionsof storage. Within a week after collection the seeds were germinated under laboratory conditions.Each set of seeds was placed onto moist filter paper which was remoistened as necessary andsubjected to room temperature of 23˚C. Half the seeds of each group received 24 hours of light, theother half were kept in darkness. Within variable periods of time the seeds of certain plants kept inthe light germinated. The seeds of other plants kept in the dark germinated. Some sets of seedsgerminated under both light regimes. One set of seeds did not germinate under either lightcondition. What might be a LOGICAL hypothesis, consistent with the data, for the lack ofgermination of the one set of seeds?A. The seeds required 12 hours of light and 12 hours of darkness in order to germinate.B. All the seeds of that group were dead.C. The seeds required an elevated temperature in order to germinate.D. The seeds required vernalization in order to germinate.E. None of the above is logical.

Which species is most likely to exhibit clumped dispersion? A. dandelions with seeds dispersed by the wind B. tigers that defend their territories from one another C. a bird that nests in many different types of trees D. a tree that grows only on the banks of streams