Flashcards on Biology and Environmental Science Essentials
Biology & Environmental Science Essentials: Student Study Guide
Tap to flip · Swipe to navigate
Arachnids
11 cards
Card 1
Question: Where do spiders produce their silk?
Answer: In specialized glands called spinnerets located in their abdomen.
Card 2
Question: How strong is spider silk?
Answer: It's as strong as steel of the same thickness.
Card 3
Question: What are the structural steps a spider takes to build a circular orb web?
Answer: It casts a line into the wind to form a bridge, crosses it to reinforce it, weaves more silk to form a suspended Y-shape, and then fills in the spokes
Card 4
Question: How do trap-door spiders catch their prey without building typical webs?
Answer: They line a small tunnel in the ground with silk and construct a camouflaged door, which they open to snatch passing insects.
Card 5
Question: Why did scientists modify the DNA of certain goats in relation to spider silk?
Answer: So that the goats would produce spider silk proteins in their milk, allowing for large quantities of the strong material to be harvested for industria
Card 6
Question: What is animal migration?
Answer: The seasonal, instinctive journey of an animal between two locations.
Card 7
Question: What makes the Arctic tern's annual migration unique?
Answer: It makes a 12,000-mile round trip between the Arctic and Antarctic each year, traveling up to 200 miles per day to remain in continuous summer.
Card 8
Question: Why do Serengeti wildebeest migrate, and what challenges do they face?
Answer: They migrate 500 to 1,000 miles in search of fresh food and safe calving grounds, facing predators, water scarcity, dwindling food supplies, and harsh
Card 9
Question: How do scientists believe migratory birds accurately find their way?
Answer: They use the position of the sun and stars, memorize the landscape below, and follow distinctive sounds and smells along their route.
Card 10
Question: What qualities do ethologists evaluate to measure animal intelligence?
Answer: Problem-solving ability, tool use, language comprehension, abstract concepts, and self-awareness.