Lesson 26.3 Flashcards
What is the role of the placenta?
organ that allows exchange of respiratory gases, nutrients, and wastes between mother and her developing thing
Allows embryo to develop for a long time inside the mother
allows the offspring to be born at advanced stage of development.
What is metamorphosis?
Development process that involves dramatic changes in shape and form.
How does an amniotic egg differ from eggs of other animals?
Amniotic eggs allow an embryo to develop outside of its mother’s body, without drying out, and contain several membranes and an external shell
The shell can vary from brittle to leathery, and it is porous, allowing gases to pass through.
What are the differences between asexual and sexual reproduction?
Asexual reproduction requires only one parent and has less genetic diversity, while sexual reproduction requires two parents and maintains genetic diversity
Asexual reproduction can happen quickly, whereas sexual reproduction takes more time and effort.
What are the differences between external and internal fertilization?
Internal fertilization takes place when eggs are fertilized inside the body, while external fertilization occurs outside the body.
What are the types of metamorphosis in insects?
Incomplete metamorphosis and complete metamorphosis
Incomplete metamorphosis involves gradual development, while complete metamorphosis includes stages of egg, larva, pupa, and adult.
What is the development process for oviparous species?
Embryos develop outside (external) of the parent’s body.
What is the development process for ovoviviparous species?
Embryos develop inside (internal) of the parent’s body, depending entirely on the yolk sac of their eggs.
What is the development process for viviparous species?
Obtain nutrients from the mother’s body during development.
How does sexual reproduction connect to genetic diversity?
Sexual reproduction maintains genetic diversity by creating individuals with new combinations of genes.
What is budding?
The release of a young, immature organism that takes place during asexual reproduction.
What is meiosis?
The process in which the number of chromosomes per cell is cut in half through the separation of chromosomes in a cell.
List the steps in the reproductive cycle of a jellyfish.
- Fertilization occurs in open water, producing zygotes
- Zygotes grow into swimming larvae, which attach to a hard surface and develop into a polyp
- The polyp reproduces asexually by budding, releasing a young medusa
- Adult medusas reproduce sexually by releasing gametes into open water.
What are the advantages of asexual reproduction?
Reproduction can happen quickly because there is only one parent.
What are the disadvantages of asexual reproduction?
one parent set of DNA, less genetic diversity.
What are the advantages of sexual reproduction?
Maintains genetic diversity, two different sets of DNA
What are the disadvantages of sexual reproduction?
Requires more time, effort, and a higher density of a population due to two different genders.
