Q: Which type of glaciers form several unique features through erosion, including cirques, aretes, and horns? Read this paragraph and choose the correct option from the provided answers: Glaciers cause erosion by plucking and abrasion. Valley glaciers form several unique features through erosion, including cirques, aretes, and horns. Choices: - line glaciers - deep glaciers - icebergs - valley glaciers A:
valley glaciers

Q: What serves as a first responder to pathogenic threats that bypass natural physical and chemical barriers of the body? Read this paragraph and choose the correct option from the provided answers: CHAPTER SUMMARY 42.1 Innate Immune Response The innate immune system serves as a first responder to pathogenic threats that bypass natural physical and chemical barriers of the body. Using a combination of cellular and molecular attacks, the innate immune system identifies the nature of a pathogen and responds with inflammation, phagocytosis, cytokine release, destruction by NK cells, and/or a complement system. When innate mechanisms are insufficient to clear an infection, the adaptive immune response is informed and mobilized. Choices: - cells immune system - super immune system - immense immune system - innate immune system A:
innate immune system

Q: The earliest animals were which kind of invertebrates? Read this paragraph and choose the correct option from the provided answers: The partial geologic time scale in Figure below shows when some of the major events in animal evolution took place. The oldest animal fossils are about 630 million years old, so presumably animals evolved around that time or somewhat earlier. The earliest animals were aquatic invertebrates. The first vertebrates evolved around 550 million years ago. By 500 million years ago, most modern phyla of animals had evolved. The first terrestrial animals evolved about 50 million years after that. Choices: - insects - mammals - dinosaurs - aquatic A:
aquatic