Podcast
Questions and Answers
Which of the following characteristics is true for prokaryotes?
Which of the following characteristics is true for prokaryotes?
- They have a nucleus.
- Their size ranges from 10-100 μm.
- They can undergo binary fission. (correct)
- They possess membrane-bound organelles.
What is a key disadvantage of asexual reproduction?
What is a key disadvantage of asexual reproduction?
- Requires complex mating rituals.
- Leads to lower survival rates under environmental changes. (correct)
- Offers the potential for genetic diversity.
- Takes a long time to produce offspring.
What distinguishes eukaryotic cells from prokaryotic cells?
What distinguishes eukaryotic cells from prokaryotic cells?
- Eukaryotic cells perform binary fission.
- Eukaryotic cells are typically smaller.
- Eukaryotic cells lack DNA.
- Eukaryotic cells have a nucleus. (correct)
Which method of asexual reproduction involves the development of a small outgrowth on a parent organism?
Which method of asexual reproduction involves the development of a small outgrowth on a parent organism?
Which of the following statements is accurate regarding the size of prokaryotes compared to eukaryotes?
Which of the following statements is accurate regarding the size of prokaryotes compared to eukaryotes?
Flashcards
Prokaryotic Cell
Prokaryotic Cell
A type of cell that lacks a nucleus and other membrane-bound organelles.
Eukaryotic Cell
Eukaryotic Cell
A type of cell that has a nucleus and other membrane-bound organelles.
Binary Fission
Binary Fission
A form of asexual reproduction in which a single-celled organism divides into two identical daughter cells.
Budding
Budding
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Fragmentation
Fragmentation
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Study Notes
Cell Size and Reproduction
- Eukaryotic cells posses a nucleus, ranging in size from 10-100 micrometers
- Prokaryotic cells lack a nucleus, ranging in size from 1-10 micrometers
- Cell size is limited; cells must divide when they reach a certain size to maintain an adequate surface area to volume ratio for nutrient intake and waste removal.
Asexual Reproduction
- Asexual reproduction involves only one parent and produces offspring genetically identical to the parent.
- Methods of asexual reproduction include:
- Binary Fission: A single cell replicates its DNA and splits into two identical cells. Examples include bacteria.
- Budding: A small outgrowth arises from the parent organism and eventually detaches to become a new organism. Examples include yeast and hydra.
- Fragmentation: An organism breaks into multiple pieces, each of which can grow a new organism. Examples include starfish.
- Vegetative Propagation: New plants grow from parts of the parent plant (stems, leaves, roots). Examples include potatoes and strawberries.
Advantages and Disadvantages of Asexual Reproduction
- Advantages: Rapid reproduction, energy efficient, no need for a mate.
- Disadvantages: Little genetic diversity, which makes the species less adaptable to environmental changes.
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