Jellyfish have lived in the oceans for millions of years. They have no brain, no heart and no bones. Their bodies are mostly water. What are jellyfish bodies mostly made of?
- AWater
- BMuscle
- CBone
- DShell
Jellyfish have lived in the oceans for millions of years. They have no brain, no heart and no bones. Their bodies are mostly water. What are jellyfish bodies mostly made of?
A glossary is a list of important words and their meanings, usually found at the back of a book. A student reading a biology textbook does not know the word “osmosis”. Where could she find its meaning quickly?
A coupon reads: “20% off any one item. Valid until 30 April. Cannot be used with other offers.” What is one rule for using the coupon?
To make a cup of tea, first boil the water. Next, put a tea bag in the cup and pour the hot water over it. Let it steep for three to five minutes, then remove the bag and add milk if you like. Which step comes immediately before removing the tea bag?
“Ella stared at the empty page. The essay was due in an hour, and she had written only her name.” How does Ella most likely feel?
Kelp is a type of large brown algae that grows in cold ocean water. Kelp forests provide food and shelter for many animals, including sea otters, which eat the sea urchins that feed on kelp. How do sea otters help kelp forests?
“Hannah had always been the first to raise her hand. Since the accident, she sat at the back of the room and rarely spoke.” What does the contrast suggest?
A study compares two groups of patients after knee surgery. Group A did physiotherapy three times a week; Group B did it once a week. After two months, Group A could walk farther. The groups were similar in age and health at the start. Why does it matter that the groups were similar at the start?
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