Lesson 31-32

Sexual reproduction in plants involves pollination. When does pollination occur?

• When a sperm is deposited on the pistil

• When a seed germinates

• When a sperm fertilizes an egg in the ovule

• When a plant produces rhizomes

Plants produce different structures to reproduce asexually by vegetative propagation. Which structure is a stem that grows above the ground and produces new plants from buds?

• Runner

• Tuber

• Rhizome

• Sepal

A student observed tiny plant-like structures growing along the edges of a leaf. What was this student observing?

• Pollination

• Germination

• Vegetative propagation

• Sexual reproduction

The ovary that surrounds the ovule of a plant develops into a fruit, such as an apple or tomato. In which type of plant does this process happen?

• Conifers

• Flowering plants

• Asexually-reproducing plants

• Aquatic plants

Seeds may remain inactive for long periods of time. These seeds are said to be dormant. What is needed for a dormant seed to start germinating?

• sunlight

• soil

• carbon dioxide

• water

A seed does not carry out photosynthesis. Therefore, a seed must contain -

• water

• nutrients

• xylem and phloem

• reproductive organs

A new plant starts to develop when a seed germinates. As a seed germinates, what two cellular processes are occurring?

• Mitosis and meiosis

• Glycolysis and fermentation

• Pollination and germination

• Mitosis and diffferentiation

As a result of cell specialization, what structures does a plant that reproduces sexually produce?

• Flowers

• Pollen

• Eggs

• Seeds

People sometimes select the two plants to be used in sexual reproduction because they contain certain desirable traits. This process is known as a -

• DNA fingerprint

• chromosomal analysis

• breeding strategy

• mutation

Plants respond to their environment. Such responses are known as tropisms. Which of the following is not an example of a tropism?

• Plant coiling around an object that it touches

• Plant losing its leaves when the temperature drops

• Plant closing its leaves when touched

• Plant using sunlight to produce food