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For the monoclinic system shown below, draw in the crystal direction: [112]  

Which statement below is evidence that all tetrapods shared a single common ancestor? All tetrapods live partly in water and partly on land. All tetrapods are warm-blooded. All tetrapod limbs consist of rearranged fish fin rays. All tetrapod limbs have a common pattern of one bone, two bones, many bones, then digits.

Platinum (Pt) has the FCC crystal structure, an atomic radius of 0.1387 nm, and an atomic weight of 195.08 g/mol. What is its theoretical density?

Examination of the fossils of Archaeopteryx reveals that, in common with extant birds, it had A) a long tail containing vertebrae. B) feathers. C) teeth. D) Three of the options listed are correct. E) Two of the options listed are correct.  

Which structure of the amniotic egg most closely surrounds the embryo? A) the chorion B) the yolk sac C) the allantois D) the amnion

Mammals and birds eat more often than reptiles. Which of the following traits shared by mammals and birds best explains this habit? A) endothermy B) ectothermy C) amniotic egg D) terrestrial habitat  

All of the following belong to the lobe-fin clade, except A) chondrichthyans. B) Australian lungfishes. C) African lungfishes. D) coelacanths. E) tetrapods.  

Briefly define the following terms, concepts or rules using words, equations, and/or sketches: Ionic bond

How are primates different from all other mammals? A) placental embryonic development B) hairy bodies C) arboreal lifestyles D) ability to produce milk E) opposable thumbs in many species  

Tiktaalik lived in cold, artic tundra in rocks about 375 million years old.