Pollination, Fertilization and Formations Of Seeds
100
What is an Angiosperm?
An Angiosperms is a flowering plant that produces sexually through its flowers by the involvement of pollination. Examples include corn, lilies, roses, tomatoes, and oaks.
100
What are the full names of Monocots and Dicots?
The full names are Monocotyledonaes and Dicotyledonaes.
100
Where do Angiosperms grow? Name 3.
Angiosperms grown in a variety of places including deserts, ponds, mountains, salt water, arctic regions, and in the tropics.
100
What are the four kinds of specialized leaves of a flower?
The four specialized leaves of a flower are sepals, petals, stamen, and carpels.
100
What is pollination and its types?
Pollination is the transfer of pollen from an anther to a stigma. There is self pollination and cross pollination.
200
What are cotyledons?
The cotyledons are the leaves of the embryo or the seed leaves. In some species they're filled with food for the germinating plant, and in others they are the first to carry out photosynthesis for the germinating plant.
200
How many cotyledons (seed leaves) do each one have?
Monocots have 1 seed leaf and Dicots have 2 seed leaves to begin with.
200
Why can Angiosperms survive in many different environments?
Angiosperms can survive in many different environments because due to natural selection their roots, stems, and leaves have evolved to fit needs of each locations.
200
Define sepals.
The sepal is the structure in the outermost circle of flower parts that encloses a bud before it opens and protects the flower while it develops.
200
Why is self pollination uncommon? Hint: Think about DNA
Angiosperms reproduce sexually, therefore self pollination is uncommon, because it does not allow as much genetic variation.
300
What are vascular bundles?
Vascular bundles are strands of xylem and phloem cells. They are scattered throughout the stem or arranged in a ring near the outside of the stems.
300
How do dicots arrange their petals and other flower parts?
Dicots arrange their petals and other parts in fours or fives or in multiples of four and fives (4,8,12) or (5,10,15)
300
What are the two families of desert plants?
The two families of desert plants are cactuses and the crown-of-thorns.
300
Which Gametophyte is smaller?
The male gametophyte is smaller than the female one.
300
What is double fertilization?
Double fertilization is when one sperm nucleus fuses with the egg nucleus to form a zygote, and one sperm fuses with the two nuclei that flank the egg to form the endosperm.
400
What are carpels?
Carpels comprise the centermost circle of flower parts.
400
Which ones stem grows thicker every year and why?
Dicot stems grow thicker from year to year because they are mostly flowering trees and most monocots are not tree like.
400
What do plants in rain forests do for sunlight?
The plants in rain forests can climb up the trunk of another plant by specialized root, stem, and leaf structures and catch sunlight.
400
What are the megasporangia called in male and female gametophytes?
In female gametophytes the megasporangia is called ovules, and in males they are called pollen chambers.
400
What is the epicotyl and the hypocotyl?
The epicotyl is the portion of the stem above the cotyledon and the hypocotyl is the portion of the stem below the cotyledon.
500
What is the radicle?
The radicle is the region at the base of the hypocotyl of a stem that contains an apical meristem and becomes the primary root.
500
In dicots, how are the vascular bundles in the root arranged?
The vascular bundles in the root of dicot are arranged with a single xylem tissue forming an "X" and bundles of phloem tissue between the arms of the "X".
500
What do plants with roots in water do for oxygen?
To supply oxygen to their roots, they have large open spaces called petioles that reach from leaves to roots. The oxygen diffuses from the leaves to the roots.
500
Define generative nucleus.
The generative nucleus is the nucleus that results from the mitotic division of the nucleus of the pollen grain; and it divides to form the two sperm cells involved in double fertilization.
500
Give an example of a monocot seed, and a example of a dicot seed. (P.S. We made this the easiest question on purpose, good job if you picked it!)