Fact 1: Female gametophytes produce eggs inside the ovaries of flowers.  Fact 2: Female gametophytes remain unisexual.  Given the two facts above, answer the question "What gametophytes produce eggs inside the ovaries of flowers?" with the following options:  - fertile  - white  - unisexual  - orchids  - Most plants  - ferns  - allow growth  - bushes
unisexual

Fact 1: Feathers help birds fly and provide insulation.  Fact 2: Penguins rely on their feathers for insulation.  Given the two facts above, answer the question "What keeps penguins warm?" with the following options:  - feathers  - muscles  - Blankets  - Animal fur  - staying warm  - energy  - blood  - fur and fat
feathers

Fact 1: Hearing is used for sensing sound by animals.  Fact 2: Hearing requires functioning ears.  Given the two facts above, answer the question "What are used for sensing sound in animals?" with the following options:  - in the frog family  - four limbs  - non-functioning ears  - noses  - eyes  - chemical messengers  - Electrical energy  - functioning ears
functioning ears

Fact 1: Amirror is used for reflecting light.  Fact 2: Light enters the camera through the lens and is reflected upward by the mirror to the ground glass.  Given the two facts above, answer the question "What redirects light in a camera?" with the following options:  - cactuses  - microscope  - photons  - electricity  - The shutter  - A mirror  - A photo  - The film
