Fact 1: Some birds are pollinators that co-evolved with plants. Fact 2: Hummingbirds are an important groups of bird pollinators. Given the two facts above, answer the question "what co-evolved with plants?" with the following options: - gravity - peachleaf willow - Chemical energy - Organic compounds - hummingbirds - h2o - density - animals
hummingbirds

Fact 1: Echinoderms lack respiratory and excretory systems. Fact 2: Starfish and sea urchins are also echinoderms. Given the two facts above, answer the question "what lack respiratory and excretory systems?" with the following options: - fish - graptolites - starfish - waste - humans - barnacles - insects - ferns
starfish

Q: Fact 1: Ozone depletion results in higher levels of UV radiation reaching Earth. Fact 2: If there is an increase in UV radiation, the risks go up for all types of skin cancer. Given the two facts above, answer the question "The risks of all types of skin cancer increases with increasing" with the following options: - oxygen debt - rays or beams - electromagnetic energy - scattered light - temperature - shadow boxing - ozone depletion - redshift
A: ozone depletion

Question: Fact 1: Echinoderms use pheromones to communicate with each other. Fact 2: Modern echinoderms include starfish and sea urchins. Given the two facts above, answer the question "How do starfish communicate?" with the following options: - huddle together - sound - interact - Vibrates - wave in air - during the day - Decibels - Pheromones
Answer: Pheromones

*Question*
Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Coral is made of the exoskeletons of many thousands of tiny marine animals called polyps. Given the two facts above, answer the question "Coral reefs are made up of the exoskeletons of thousands of what?" with the following options: - Absorb light - scarce resources - Chlorophyll - tiny polyps - to stay warm - animals - salt and water. - graptolites
**Answer**
tiny polyps

(Question)
Fact 1: Tectonic plates being pushed together causes earthquakes. Fact 2: Plumbing is sometimes damaged during an earthquake. Given the two facts above, answer the question "What can damage plumbing?" with the following options: - several different ways - an automobile engine - Breathing too fast or too slow - smallest agents of disease - fissures of hot, acidic water - volatile substances - tectonic plates being pushed together - erosion from rivers
(Answer)
tectonic plates being pushed together