Plant & Animal Reproduction

Question 1

Scientists have observed that a flowering plant produces long, tubular, bright‑red flowers that are visited almost exclusively by hummingbirds. Which statement best explains how this flower shape and color affect the plant’s probability of successful reproduction?

Accepted Answer

The red, tubular shape attracts hummingbirds, which transfer pollen from one flower to another, increasing the likelihood that seeds will form.

Answer

The tubular shape allows the plant to store more water, helping it survive drought and produce more seeds.

Answer

The bright red color makes the plant grow taller, so it can outcompete neighboring plants for sunlight.

Answer

The red color deters insects that might eat the flower, protecting it from damage.

Question 2

A bee lands on a lavender flower and picks up pollen. Which of the following choices correctly lists the three main events that happen to produce a new seed in that flower?

Accepted Answer

Pollen reaches the stigma (pollination), a pollen tube carries sperm to the ovule (fertilization), the ovule develops into a seed (seed development).

Answer

The flower opens, the bee deposits nectar, the seed falls to the ground.

Answer

The flower makes a fruit, the pollen travels to the stigma, the seed grows inside the fruit.

Answer

Pollen lands on the stigma, the ovule starts to grow, the seed is released into the soil.

Question 3

A certain flowering plant has bright orange, tubular flowers that are the exact length of a hummingbird’s beak. Which of the following explanations best describes how this plant characteristic most likely increases the plant’s probability of successful reproduction?

Accepted Answer

The flower’s shape and color attract hummingbirds, which transfer pollen as they feed, increasing pollination rates.

Answer

The plant produces many seeds in each fruit, so even if few are pollinated, enough will grow.

Answer

The plant’s leaves are large and broad, providing more surface area for photosynthesis, which directly boosts seed production.

Answer

The plant’s deep root system allows it to absorb more water, leading to larger flowers that attract more insects.

Try three questions

Scientists have observed that a flowering plant produces long, tubular, bright‑red flowers that are visited almost exclusively by hummingbirds. Which statement best explains how this flower shape and color affect the plant’s probability of successful reproduction?

A bee lands on a lavender flower and picks up pollen. Which of the following choices correctly lists the three main events that happen to produce a new seed in that flower?

A certain flowering plant has bright orange, tubular flowers that are the exact length of a hummingbird’s beak. Which of the following explanations best describes how this plant characteristic most likely increases the plant’s probability of successful reproduction?

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