Review Questions to answer with a lab partner- write your answers in your lab no

Question

Review Questions to answer with a lab partner- write your answers in your lab notebook. 1. Why is asexual reproduction rare in animals compared to sexual reproduction? 2. What are the trade-offs of asexual vs. sexual reproduction? (look back on the list you made after the Why Sex Video 3. Provide two examples of animals that reproduce asexually and what method of asexual reproduction do they undergo? 4. Contrast bering an oviparous animal with being a viviparous animal. What are the advantages of cach? 5. Rank the following forms of animal life cycles or reproduction from least number of offspring expected to be produced to most number of offispring expected to be produced Rank Type of Life Cycle Parthenogenesis Sexual reproduction with a complex life cycle

Explanation / Answer

1. asexual reproduction is rare in animals because asexual reproduction gives rise to genetically identical clones, low genetic diversity, making animals susceptible to extinction upon any disease manifestation.

2. sexual reproduction:

advanatages: provides high genetic variability, adaptation, speeds up evolution

disadvantages: high energy cost, courtship is time consuming, alltruism- usually sacrifices the fitness of one sex to the other

asexual reproduction:

advantages: saves energy, courtship is not an issue, fitness of an individual is increased.

disadvantages: low genetic variability, adaptation is low, retards evolution

3. Hammerhead sharks produce asexually through parthenogenesis,

Hymnoptera show polyembrynoy where the fertilised egg in its later stages split to form clones

4. Oviparous animals lay eggs

Advantages: reduced gestation periods, independent development

Viviparous animals are born from alive from mothers womb

advantage: protection and physiologically maintainance

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