reproductive science test Flashcards
What are the 8 characteristics of life?
- Obtain and Use energy
- Responds to stimuli
- Grow and develop
- Reproduce
- Organization / made of cells
- Regulation
- Adaptation
- Movement
The characteristics of sexual reproduction?
Sexual - 2 parents, parents combine their genetic material to produce offspring, occurs through sperm fertilizing an egg, egg has ½ genetic material of mother and ½ of father
The characteristics of asexual reproduction?
Asexual - One parent, offspring are identical ( like cloning)
Advantages of sexual reproduction
Advantages of sexual - Leads to variation in new generation, organism is more protected ( does not necessarily have the weaknesses of the parent), removes bad genes from populations
Disadvantages of sexual reproduction
Disadvantages of Sexual - Organism must find a mate in which they use to reproduce, can prevent favorable genes from being passed down, produces few offspring. MORE TIME AND ENERGY CONSUMING
Advantages of asexual reproduction
Advantages of Asexual - Good for organisms that are not mobile and cannot look for a mate, numerous offspring without costing the parent a great amount of energy, quick
Disadvantages of asexual reproduction
Disadvantages of Asexual Reproduction -Lacks genetic variation, all organisms share the same weaknesses, no time to adapt quickly enough to survive
Four types of reproduction
Vegetative reproduction, budding, fragmentation, binary fission
How does asexual reproduction happen in plants?
vegetative propagation
How does sexual reproduction happen in plants?
It happens with the use of seeds and spores. When pollen fertilizes an egg.
What happens during the sporophyte and gametophyte stage in a plant’s life cycle?
In the sporophyte stage, a plant produces spores that will develop into gametophytes. In the gametophyte stage, male and female gametophytes produce sex cells that will be involved in fertilization.
What is special about the sporophytes of nonvascular and seedless vascular plants?
In nonvascular plants, the sporophytes resemble small trees or flowers. In seedless vascular plants, the sporophytes produce spores that have both male and female gametophytes.
What is the difference between male and female cones?
Male cones hold pollen and female cones have an ovule.
How are angiosperms pollinated?
Angiosperms are pollinated by wind or through pollinators.
Why are fruits important to angiosperms’ reproduction?
They are important because they are means to help spread seeds.
Label the reproductive parts of a flower
Hi Kate! Don’t forget to memorize this. ILY more!!
What is a behavior?
A behavior is the way an organism reacts to changes in its internal conditions or external environment.
What is an instinct?
An instinct is a response to stimuli that is inborn and an animal performs correctly the first time.
How do animals communicate with each other?
Animals communicate through sounds, scents, and body movements.
What are the two main goals of communication?
The two main goals of communication are safety and reproduction.
How may some animals attract a mate?
Sounds, visual displays, scents, gifts
What resources do animals compete for?
Food, water, shelter
How does parental care relate to the number of offspring produced?
If an animal has fewer offspring, it will care for them. If it has larger amounts of offspring, they will not care for them in hopes that some of them will survive.
What are the two fertilization strategies?
internal and external
