9th Sep '25

Multiple Choice 2015-16

Question	Answer	Point
What part of the plant is involved in sexual reproduction?		Flowers are the genitals of plants
What is the male part of the flower called?	Flower structure - The Stamen is the male part of a flower. - The Stamen consists of an Anther and Filament. - The Anther contains pollen, the male gamete cell. -The Filament attaches the stamen to the anther. - The Carpel is the female part of a flower. - The Carpel consists of a Stigma, Style and Ovary. - The style is the stalk in the centre of the flower. - The Stigma is on the end of the style. - The Ovary contains the Ovule, the female gamete cell. - The flower also has Petals (to attract insects) and Sepals (green leaves which contain flower before budding).	Flower structure - The Stamen is the male part of a flower. - The Stamen consists of an Anther and Filament. - The Anther contains pollen, the male gamete cell. - The Carpel is the female part of a flower. - The Carpel consists of a Stigma, Style and Ovary. - The Stigma is on the end of the style. - The Ovary contains the Ovule, the female gamete cell. - The flower also has Petals and Sepals.
How can an insect pollinator transfer pollen from one flower to another?	insect pollination: - Insects attracted to petals and nectar. - Insect enters flower and pollen is transferred from Anther to Insect. - Insect is attracted to another flower. - Pollen from Insect is transferred to Stigma. - Pollen cell grows a pollen tube down the Style to the Ovary.	insect pollination: - Insects attracted to petals and nectar. - Insect enters flower and pollen is transferred from Anther to Insect. - Insect is attracted to another flower. - Pollen from Insect is transferred to Stigma. - Pollen cell grows a pollen tube down the Style to the Ovary.
What happens to cause fertilisation in a flower?	Fertilisation occurs when the Pollen nucleus fuses with the Ovule. The fertilised Ovule forms the seed. The Ovary forms the Fruit.	Fertilisation occurs when the Pollen nucleus fuses with the Ovule. The fertilised Ovule forms the seed. The Ovary forms the Fruit.
What is the role of a pollen cell?	The function of Pollen cells are to transfer genetic material (DNA) from one plant to another.	The function of Pollen cells are to transfer genetic material (DNA) from one plant to another.
How are pollen cells adapted - Give at least 2 ways.	Pollen cells are adapted to their function by: - being small (microscopic) - having a tough outer coating - can have spikes or hooks	Pollen cells are adapted to their function by: - being small (microscopic) - having a tough outer coating - can have spikes or hooks
Why does pollen have a tough outer coating? Why do some pollens have spikes or hooks on them?	Pollen being small allows it to be transported easily by insects (and wind next lesson) Pollen having a tough outer coating allows the cell to survive in the environment away from the plant. Pollen have spikes or hooks makes it more likely to stick to insects.	Pollen being small allows it to be transported easily by insects (and wind next lesson) Pollen having a tough outer coating allows the cell to survive in the environment away from the plant. Pollen have spikes or hooks makes it more likely to stick to insects.
What different methods can be used to transfer pollen?	Some plants use the Wind to pollinate other plants.	Some plants use the Wind to pollinate other plants.
Why is it important for plants to spread seeds far?	The most successful plants are wide spread due to their dispersal mechanisms.	The most successful plants are wide spread due to their seed dispersal mechanisms.
What are the different ways seeds can be dispersed?	Dispersal mechanisms - Wind - Animal eating - Animal fur - Water - Explosive	Dispersal mechanisms - Wind - Animal eating - Animal fur - Water - Explosive
What does a food chain show?	the interdependence of organisms in an ecosystem, including food webs and insect pollinated crops	A food chain shows how energy passes from one organism to another.
What do food chains start with?	Food chains begin with a producer, which is normally a green plant.	Food chains begin with a producer, which is normally a green plant.
How do plants get energy?	Green plants get their energy from the sun through photosynthesis.	Green plants get their energy from the sun through photosynthesis.
What is a consumer?	Organisms that eat other organisms are called consumers.	Organisms that eat other organisms are called consumers.
What is the second level in a food chain called?	The first consumer in a food chain is called the primary consumer. The second the secondary consumer and the third the tertiary. The final consumer is called the top consumer.	The first consumer in a food chain is called the primary consumer. The second the secondary consumer and the third the tertiary. The final consumer is called the top consumer.
What is an animal that hunts another animal called?	Animals that hunt other animals are called predators, they are unlikely to be primary consumers.	Animals that hunt other animals are called predators, they are unlikely to be primary consumers.
How is a food web difference to a food chain?	Food webs are formed by combing the multiple food chains in an ecosystem.	Food webs are formed by combing the multiple food chains in an ecosystem.
What is it called when changes in a population of one species affect the population of other species?	A change in the population of an organism in a food web will affect the other organisms in the food chain. This is known as interdependence.	A change in the population of an organism in a food web will affect the other organisms in the food chain. This is known as interdependence.
How is a pyramid or number arranged?	A pyramid of numbers shows how many organisms are consumed at each stage (trophic level) of a food web. Generally, there are more organisms consumed at earlier stages. This is because most of the energy consumed is used for movement or staying warm. Little is used to build body mass.	A pyramid of numbers shows how many organisms are consumed at each stage (trophic level) of a food web. Generally, there are more organisms consumed at earlier stages. This is because most of the energy consumed is used for movement or staying warm. Little is used to build body mass.
What is bioaccumulation and what levels of the food chain will it affect the most?	Organisms on low levels of the food web can ingest small amounts of toxic materials and survive. When multiple low level organisms are ingested by higher level organisms the toxic materials accumulate to levels that are dangerous. This is called bioaccumulation.	Organisms on low levels of the food web can ingest small amounts of toxic materials and survive. When multiple low level organisms are ingested by higher level organisms the toxic materials accumulate to levels that are dangerous. This is called bioaccumulation.
Why are insect pollinators important to humans?	the importance of plant reproduction through insect pollination in human food security	75% of the food we eat relies on insect pollinated crops.
If a field only grows the crop and no other plants, why might this be bad for insects?	In large areas growing single crops, there is no food for insects when the crop is not in flower.	In large areas growing single crops, there is no food for insects when the crop is not in flower.
Why should we look after insect pollinators?	It is important to ensure the survival of pollinating insects to ensure human food security.	It is important to ensure the survival of pollinating insects to ensure human food security.

Mod	Number of Questions
0S	10
1B	10
1C	10
1P	10
BI	5