Worksheet on asexual and sexual reproduction for a biology class.

Let's solve the worksheet step by step and provide explanations for each answer.

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Multiple Choice

1. _________ reproduction involves only one parent and produces offspring that are genetically identical to the parent.

- Answer: B. Asexual

✔ Explanation:
Asexual reproduction involves only one parent and results in offspring that are genetically identical (clones) because there is no mixing of genetic material. This is different from sexual reproduction, which involves two parents and genetic variation.

> The image of the starfish may be a hint — some starfish can reproduce asexually via regeneration (e.g., regrowing from a fragment).

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2. _________ reproduction involves two parents combine their genetic material to produce a new organism which differs from both parents.

- Answer: A. Sexual

✔ Explanation:
Sexual reproduction requires two parents (usually male and female), and their gametes (sperm and egg) fuse during fertilization to form a zygote. This leads to genetic variation in the offspring, making them different from both parents.

> The image of the bird with chicks likely represents sexual reproduction, as birds typically reproduce sexually.

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True or False Section

Now let’s go through each statement:

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1. Asexual reproduction is the simplest form of reproduction.
✔ T (TRUE)
→ Asexual reproduction is simpler because it doesn’t require gametes, mating, or complex reproductive systems. It’s common in single-celled organisms and some simple multicellular organisms.

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2. During budding, a new organism forms from a piece of the original.
✘ F (FALSE)
→ This is not accurate. In budding, a new organism grows out from the body of the parent (like a bud), not from a detached piece. The bud develops into a new individual while still attached, then detaches later.
👉 Example: Hydra.

> Correct description: “A new organism grows out from the parent until it fully matures and breaks off.” → That's actually fragmentation, not budding.

So this statement is false.

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3. In fragmentation, a new organism grows out from the parent until it fully matures and breaks off.
✔ T (TRUE)
→ Yes, in fragmentation, a part of the parent breaks off and develops into a new organism. For example, in sea stars or planarians, if a fragment survives, it can regenerate into a complete organism.

> Note: This is often confused with budding. But in budding, the new organism starts growing *from* the parent and eventually separates. In fragmentation, the parent splits into pieces, and each piece regenerates.

So this statement is true.

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4. Asexual reproduction involves an egg cell and a sperm cell joining to form a new cell in a process called fertilization.
✘ F (FALSE)
→ This describes sexual reproduction. In asexual reproduction, there is no fusion of gametes (no sperm or egg). Fertilization is exclusive to sexual reproduction.

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5. A specific characteristic that an organism can pass to its offspring through its genes is called a trait.
✔ T (TRUE)
→ Yes, a trait is a heritable feature (like eye color or height) passed from parents to offspring via genes.

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6. Each gene that is passed from the parents determines a trait of the offspring. As a result, offspring may look very different to their parents.
✘ F (FALSE)
→ While genes determine traits, this statement is misleading. Offspring do not necessarily look very different from their parents. They inherit a mix of traits, so they resemble parents but may have combinations not seen in either parent due to genetic recombination.

But the main issue: The claim that "each gene determines a trait" oversimplifies genetics. Often, multiple genes influence one trait (polygenic inheritance), and environment also plays a role.

Also, "offspring may look very different" is not always true — many offspring resemble parents closely.

So overall, this statement is false due to overgeneralization.

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7. Organisms do not have to find a mate and can reproduce many offspring fairly quickly in asexual reproduction.
✔ T (TRUE)
→ True! Asexual reproduction is efficient: no need to find a mate, less energy spent, and rapid population growth (e.g., bacteria dividing by binary fission).

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8. Organisms need to find a mate that can take a lot of time and energy in sexual reproduction.
✔ T (TRUE)
→ Yes, finding a mate involves behaviors like courtship, competition, and sometimes long distances or risks. This uses more energy than asexual reproduction.

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✔ Final Answers:

#### Multiple Choice
1. B. Asexual
2. A. Sexual

#### True/False
1. T
2. F
3. T
4. F
5. T
6. F
7. T
8. T

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