Asexual Reproduction
How many parents are needed for asexual reproduction to occur?
Only 1 parent cell is needed
How many parents are needed for sexual reproduction to occur?
2 parents (1 male, 1 female) are needed
Name an advantage of asexual reproduction?
Only needs one parent, happens very quickly, offspring are clones of parents, successful characteristics are guaranteed, requires less energy and time
A careless diver hits a sponge with his flipper. The sponge breaks off. The piece that breaks off grows back into an entirely new sponge. The original sponge repairs itself. Which type of adaptation is this and how do you know?
Asexual reproduction, because the organism regenerated.
The king snake and coral snakes are very similar in color. One will kill you and the other will not...do you know the difference?
Mimicry
Are the daughter cells exactly the same as or different from the parent cells?
Exactly the same (identical copies)
Are the offspring exactly the same or different from the parents? Why?
The offspring are different because they get characteristics from the father and the mother.
Name an advantage of sexual reproduction.
Lots of variation can occur, Variations can help organisms to survive in new environments, Help to protect entire populations from being killed by diseases
Two gametes from protozoans come together or fuse. What type of reproduction is this and why?
Sexual reproduction, because there are TWO parents.
Elks bugle to attract a mate
Mating Calls
Name the four types of asexual reproduction.
Binary Fission, Budding, Fragmentation/Regeneration, Vegetative Propagation
Is sexual reproduction a slow process or a quick process?
Slow process
Name a disadvantage of asexual reproduction.
Lack of variation, organisms are more susceptible to diseases, organisms are less likely to adapt to new environments
Two bacteria form a connecting bridge during conjugation. One cell donates material to the second cell. The two cells separate by dissolving the connecting bridge. Which type of reproduction is this, and how do you know?
Sexual reproduction. One bacteria donates material to the other.
Courtship
Which type of asexual reproduction do most bacteria use?
Binary Fission
What is fertilization?
When a male cell (sperm) joins with a female cell (egg/ovum) to create a zygote/new organism
Name a disadvantage of sexual reproduction.
Organisms/Cells take a longer time to mature, Must have a mate (2 parents), Takes more energy and time
Pond water contains a microscopic green algae called volvox. Thousands of individual cells group together to form a colony. The spheres inside the colony are miniature clones of the parent. When they grow large enough, the paren colony falls apart and releases the spheres into the water. What type of reproduction is this and how do you know?
The more attractive flower is the one that is visited by the most pollinators.
Coloration
Which type of asexual reproduction do plants generally use?
Vegetative Propagation
Name the two disadvantages of sexual reproduction
Must find a mate, takes a longer time, can prevent favorable genes from being passed down, produces fewer offspring
Which type of reproduction creates organisms with a lot of variations? Why
Sexual Reproduction because the offspring get characteristics from both parents, rather than just one parent.
A strawberry plant has been growing for three seasons. It sends out "runners" along the ground that produce new strawberry plants. Bees and other insects also come along to pollinate the strawberry with other strawberry plants. What type of reproduction is this and how do you know?
Asexual reproduction because of the runners AND sexual because of the pollination between TWO plants.
After laying her dozens of eggs, the mother alligator covers them up and guards the nest. Name the adaptations.
Parental Care and number of gametes