Barnacles are crustaceans that live in the ocean. Barnacle larvae are motile and secrete a sticky substance that allows them to attach to a suitable substrate. As they mature into sedentary adults, they secrete layers of calcium carbonate that serve as a protective covering. Some barnacles have been known to attach to the sides of whales. This benefits the barnacles in that they are constantly transported to locations with new sources of food. The whales neither benefit nor are harmed by the presence of barnacles. Barnacles follow r selection strategies. The calcium carbonate covering that protects barnacles is an adaptation that probably evolved as a result of what type of pressure? a) Density independent b) Predation c) Biotic d) Facultative symbiosis

Barnacles are crustaceans that live in the ocean. Barnacle larvae are motile and secrete a sticky substance that allows them to attach to a suitable substrate. As they mature into sedentary adults, they secrete layers of calcium carbonate that serve as a protective covering. Some barnacles have been known to attach to the sides of whales. This benefits the barnacles in that they are constantly transported to locations with new sources of food. The whales neither benefit nor are harmed by the presence of barnacles. Barnacles follow r selection strategies. The calcium carbonate covering that protects barnacles is an adaptation that probably evolved as a result of what type of pressure? a) Density independent b) Predation c) Biotic d) Facultative symbiosis

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter15: Diversity Of Animals

Section: Chapter Questions

Problem 4RQ: Which of the following is not a feature common to most animals? a. development into a fixed body...

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Barnacles are crustaceans that live in the ocean. Barnacle larvae are motile and secrete a sticky substance that allows them to attach to a suitable substrate. As they mature into sedentary adults, they secrete layers of calcium carbonate that serve as a protective covering. Some barnacles have been known to attach to the sides of whales. This benefits the barnacles in that they are constantly transported to locations with new sources of food. The whales neither benefit nor are harmed by the presence of barnacles. Barnacles follow r selection strategies. Which of the following is not accurate of barnacles based on this information? a) High fecundity b) Extensive parental care c) Early maturation d) Short lifespan
A rise in atmospheric carbon dioxide increases ocean acidity, making it harder for animals to build calcium carbonate parts. List some invertebrate animals that increased ocean acidity could harm in this way
Which of the following is not a feature common to most animals? a. development into a fixed body plan b. asexual reproduction c. specialized tissues d. heterotrophic nutrient sourcing
Elephant seals do deep dives to forage for food. The energy used by the seals in diving depends on their body composition; for example, fatter seals use less energy to swim to the surface at the end of a dive, allowing them to takelonger, more productive dives. Explain why you’d expect this to be the case.
The migratory eel, Anguilla rostrata, is born and lives the juvenile (immature) part of its life in a freshwater environment, but then migrates thousands of miles through the ocean as an adult in order to breed. These eels are known to regulate their internal water and salt balance. What adaptations would you expect this eel to have in order to transition from fresh water to salt water at these two life stages The adult eels would be better at removing salt from their bodies compared to juveniles. The adult eels would spend energy keeping salt in their bodies. The juvenile eels would spend energy keeping water in their bodies. The juvenile eels would be better at removing salt from their bodies compared to adults. please help
Calcium carbonate is used by corals, shelled organisms, and a variety of other marine creatures to construct tissue components. What is the impact of climate change on their ability to construct those components? Temperature increases have diminished available calcium ions in marine habitats Hydrogen ions have increased acidity and will bind to carbonate ions decreasing avialblity to build calcium carbonate shells Hydrogen ions increase basicity of marine waters and induce dissolution of calcium carbonate structures Ocean warming is causing reactions to speed up and shells therefore are thinner and weaker Shelled organism are a product of founder effect
Classify the following animals into carnivores, herbivores and omnivores A) Elephant B) Human being C) Cat D) Rat E) Goat
What is the definition of the word carnivore? An organism that obtains energy by feeding on other organisms. An animal that eats other animals An animal that eats only plants An animal that eats both plants and animals
Which of the following is NOT a characteristic of living things? a.)they reproduce b.)they respond to stimuli c.)they need materials and energy d.)they grow by the accretion of sediments
Ungulates Ungulates, such as deer, reindeer, and elk, are hoofed mammals. These animals have keen hearing, clear vision, supple, well-conditioned muscles, and razor sharp reflexes. The evolution of the four-chambered stomach in ungulates developed as a result of a need to eat quickly in the open and chew later in the safety of cover. This process is called ruminating or "chewing the cud." In other words, ungulates regurgitate and then re- chew their food. Which of the following would be considered a physiological adaptation of ungulates? A) their four-chambered stomach B) their long legs, which help them outrun predators C) their ability to stand perfectly still, which helps them avoid predators D) their ability to hibernate to avoid cold winters
Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. Given the data described in the introduction to this section, what effect do African mammals have on oxpeckers a) Positive b) negative c) neutral
Red-billed oxpeckers feed almost exclusively on what they can collect from the skin of large African mammals. This includes ticks and other ectoparasites, but also dead skin and blood of the mammal. The attached image shows a red-billed oxpecker sitting on the back of a warthog with a tick in its bill. A recent study found that the depletion of African mammals due to habitat loss and hunting leads to declines in oxpeckers. Researchers were interested in whether the nature of the interaction between African mammals and oxpeckers was context-dependent. They compared the effect of removal of oxpeckers in two areas in which the number of ticks on the mammals differed. In area 2, stomach content data of oxpeckers showed they consumed ~400 ticks per day. Cows were infested experimentally with large numbers of tick larvae and then oxpeckers were introduced at different stages in the tick life cycle (larvae; nymph; adult). They counted the number of adult ticks that dropped off the…