SOLUTION: Reproduction worksheet 5 asexual reproduction 2015 2016 ... - Free Printable

Problem Analysis and Solution

The provided image contains a table comparing the advantages and disadvantages of asexual reproduction and a series of multiple-choice questions related to asexual reproduction. Below, I will solve each question step by step and explain the reasoning.

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Table: Advantages and Disadvantages of Asexual Reproduction

The table lists the advantages and disadvantages of asexual reproduction. Here is a summary:

#### Advantages of Asexual Reproduction
1. Large numbers of offspring are reproduced quickly.
2. Does not require a lot of energy to find a mate.
3. Very little or no parental care is needed for offspring.
4. Able to reproduce from one offspring organism.

#### Disadvantages of Asexual Reproduction
1. Offspring are genetic clones. A negative mutation can make asexually reproduced organisms more susceptible to disease and can destroy a large number of offspring.
2. Extreme temperatures can wipe out entire colonies.
3. Offspring compete for food and space.

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Questions and Solutions

#### Question 1:
Asexual reproduction requires
- (A) only one parent to produce offspring
- (B) two parents to produce offspring
- (C) a combination of parents to produce offspring
- (D) two clones to produce offspring

Solution:
Asexual reproduction involves the production of offspring from a single parent without the fusion of gametes. This means only one parent is required.

Answer: (A)

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#### Question 2:
Which of the following is definitely not an example of asexual reproduction?
- (A) Breeders cross different dogs to develop a new breed of dog
- (B) Geneticists grow a field of blight-resistant wheat using the cells of a single plant
- (C) Bread mould spreads on a slice of bread at the back of the fridge
- (D) New raspberry shoot sprouts in the lawn near the raspberry patch

Solution:
- (A) Breeders cross different dogs: This involves sexual reproduction because it requires two parents (male and female dogs) to produce offspring.
- (B) Growing wheat from a single plant's cells: This is a form of asexual reproduction (e.g., tissue culture).
- (C) Bread mould spreading: This is asexual reproduction through spore formation.
- (D) New raspberry shoots sprouting: This is asexual reproduction through vegetative propagation.

Answer: (A)

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#### Question 3:
A horticulturist takes small pieces of tissue from a prized orchid and grows them into one hundred new orchid plants. These new plants
- (A) will be immortal.
- (B) will be at the same stage of maturity as the identical plant.
- (C) will likely mature to be twice the size of the original plant.
- (D) will exhibit identical flowers to the original plant.

Solution:
When small pieces of tissue are taken from a plant and grown into new plants (a form of asexual reproduction), the resulting plants are genetically identical to the original plant. Therefore:
- They will have the same characteristics, including the type of flowers.
- They will not be immortal.
- They will not necessarily be at the same stage of maturity or twice the size of the original plant.

Answer: (D)

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#### Question 4:
Some bacteria that do not have a nucleus and cannot undergo mitosis use which reproductive method?
- (A) Binary fission
- (B) Budding
- (C) Sexual reproduction
- (D) Fragmentation

Solution:
Bacteria reproduce asexually. Since they do not have a nucleus and cannot undergo mitosis, they use binary fission, where the cell divides into two identical daughter cells.

Answer: (A)

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#### Question 5:
If an organism breaks apart as a result of injury and each fragment develops into a new individual, this is called
- (A) binary fission
- (B) budding
- (C) spore formation
- (D) fragmentation

Solution:
- Binary fission: Division of a single cell into two identical cells.
- Budding: Growth of a bud from the parent organism that eventually detaches and becomes independent.
- Spore formation: Production of spores that can develop into new individuals.
- Fragmentation: Breaking of the organism into fragments, each of which can grow into a new individual.

The scenario described matches fragmentation.

Answer: (D)

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#### Question 6:
Which of the following is an example of vegetative reproduction?
- (A) A single lily bulb once planted becomes a large colony of identical lilies in three summers
- (B) A new baby fern shows up your back yard, just like the fern your neighbours have next door
- (C) A new starfish grows from the severed tip of a tentacle
- (D) Strep throat bacteria quickly colonize in your body and make you sick

Solution:
- Vegetative reproduction involves the production of new individuals from parts of the parent plant without the involvement of seeds or spores.
- (A) Lily bulb: This is vegetative reproduction because the bulb grows into a colony of identical lilies.
- (B) Baby fern: This could be either sexual or asexual reproduction but is not specifically vegetative.
- (C) Starfish regrowth: This is regeneration, not vegetative reproduction.
- (D) Strep throat bacteria: This is bacterial reproduction, not vegetative reproduction.

Answer: (A)

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Final Answers:

1. (A) only one parent to produce offspring
2. (A) Breeders cross different dogs to develop a new breed of dog
3. (D) will exhibit identical flowers to the original plant
4. (A) Binary fission
5. (D) fragmentation
6. (A) A single lily bulb once planted becomes a large colony of identical lilies in three summers

Boxed Final Answer:
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