Seed plants first appeared during the _____.
Answer: Paleozoic
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Learn More Multiple Choice Question :
- Which of the following statements is correct in regard to Homo erectus?
- Which of the following is a cluster of genes coding for transcription factors involved in the evolution of innovations in early vertebrate nervous systems and vertebrae?
- Terry catches a ray-finned fish from the ocean and notices that attached to its flank is an equally long, snakelike organism. The attached organism has no external segmentation, no scales, a round mouth surrounded by a sucker, and two small eyes. Terry thinks it might be a marine leech, a hagfish, or a lamprey.
- Some animals that lived 530 million years ago resembled lancelets but had a brain and a skull. These animals may represent
- Which of the following is the most inclusive (most general) group, all of whose members have fully opposable thumbs?
- Which of these statements about human evolution is correct?
- While on an intersession course in tropical ecology, Kris pulls a large, snakelike organism from a burrow (the class was granted a collecting permit). The 1-m-long organism has smooth skin, which appears to be segmented. It has two tiny eyes that are hard to see because they seem to be covered by skin. Kris brings it back to the lab at the field station, where it is a source of puzzlement to the class. Kris says that it is a giant oligochaete worm; Shaun suggests it is a legless amphibian; Kelly proposes it belongs to a snake species that is purely fossorial (lives in a burrow).
- Which of the following could be considered the most recent common ancestor of living tetrapods?
- At least one of these has been found in all species of eumetazoan animals studied thus far.
- One major advantage of using Arabidopsis thaliana as a model system for studies of plant form and function is its
- Which of the following is the most specific group that includes both the Old World monkeys and the New World monkeys?
- In the United States and Canada, bats use one of two strategies to survive winter: They either migrate south, or they hibernate. Recently, those that hibernate seem to have come under attack by a fungus, Geomyces destructans (Gd), an attack that is occurring from Missouri to southern Canada. Many infected bats have a delicate, white filamentous mat on their muzzles, which is referred to as white-nose syndrome (WNS). The fungus invades the bat tissues, causes discomfort, and awakens the bat from its hibernation. The bat fidgets and wastes calories, using up its stored fat. The bat then behaves abnormally, leaving its cave during daytime in winter to search for food. Their food, primarily insects, is scarce during the winter, and the bats ultimately starve to death. Since 2007, it is estimated that up to 1 million bats have perished from WNS.
- Which clade does not include humans?
- The oldest fossil remains of Homo sapiens found so far date from about
- Unlike eutherians, both monotremes and marsupials
- Vertebrates and tunicates share
- Which of the following is the most inclusive (most general) group, all of whose members have foramina magna centrally positioned in the base of the cranium?
- If a ray-finned fish is to both hover (remain stationary) in the water column and ventilate its gills effectively, then what other structure besides its swim bladder will it use?
- Due to its system of nine air sacs connected to the lungs, the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.
- As hominins diverged from other primates, which of the following appeared first?
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