Exam 24: Reproduction and Development of Flowering Plants

In all major groups of multicellular organisms,_______________ produces the cells that begin the haploid generation,and _________________ unites the gametes to begin the diploid generation.

Cocklebur will not flower if exposed to 8 hours of dark and 16 hours of light.It will flower if exposed to 16 hours of dark and 8 hours of light.However,if the 16 hours of dark is interrupted with a brief period of light,the cocklebur will not flower.Which of the following will trigger cocklebur to flower?

Seedless watermelons come from seeds that are triploid and therefore do not develop properly.They are simply soft hulls that are easy to chew.

Three college students purchased a bag of fresh-picked,unripened apples from a nearby orchard.Keeping the apples in a paper bag for several days,the apples ripened.This was a response to the plant hormone

In the late 1870s,Charles Darwin and his son Francis discovered that if the tip of the grass was covered,phototropism did not occur,even though the rest of the grass was exposed to light.However,if the rest of the plant was covered and only the tip exposed to light,the grass bent a few centimeters below the tip.How could light striking the tip of the grass cause bending a few centimeters from the tip? Choose the most likely explanation from the below choices.

Senescence means that

You plant a seed into a pot containing some soil,and then add water and place the pot under a light.In the first week,before the seedling even emerged from the soil,carbon dioxide levels increased in the closed chamber.The developing plant was using which of the following as a source of energy during this first week?

In biology lab,your teacher places petri dishes on the lab table.Upon examination,you observe that there are lumps of plant tissue,and you are told that they have been grown artificially and can produce new plants.Each lump is a(n)

In plants,molecules that perceive the quality and quantity of light are

If you wanted a grass plant to bend to the right,where would you want to apply auxin?

Which animals were most likely to eat the hot peppers?

Hiking a trail,you observe large white flowers,having large anthers,and producing a strong aroma,yet no pollinators are currently visible.The pollinators likely to pollinate these flowers are

What conclusion did the researchers draw from the results of the feeding preference studies?

Angiosperms owe their widespread distribution to their production of pollen,seeds,and flowers.Why is the production of seeds an advantage?

What is the normal function of fruits?

The number of similar anatomical parts called whorls that make up a complete flower is

Pollination is the transfer of pollen from a(n)_____ to a receptive _____.

Whorl three of a flower is made up of the

Angiosperms owe their widespread distribution to their production of pollen,seeds,and flowers.Why is the production of flowers an advantage?

The type of fruit that is derived from one flower with one carpel is a ______________ fruit.