Q: Answer the following question given this paragraph: Pakicetus and Rodhocetus are considered to be ancestors of modern whales. Scientists still argue about how aquatic Pakicetus was, but Rodhocetus is considered to be a largely aquatic animal. Where is the nostril located on Pakicetus ?. Q: Pakicetus and rodhocetus are considered to be ancestors of modern what? Choices: - rodents - primates - hominins - whales A:
A: whales

Q: Answer the following question given this paragraph: Most amphibians breathe with gills as larvae and with lungs as adults. Additional oxygen is absorbed through the skin in most species. The skin is kept moist by mucus, which is secreted by mucous glands. In some species, mucous glands also produce toxins, which help protect the amphibians from predators. The golden frog shown in Figure below is an example of a toxic amphibian. Q: What do most amphibians breathe with as larvae? Choices: - pores - lungs - nasal passages - gills A:
A: gills

Q: Answer the following question given this paragraph: Each human somatic cell (a body cell, or every cell other than a gamete) normally has two sets of chromosomes, one set inherited from each parent. These cells are said to have a diploid number of chromosomes. Each set contains 23 chromosomes, for a total of 46 chromosomes. Each chromosome differs in size, from about 250 million nucleotide pairs on the largest chromosome (chromosome #1) to less than 50 million nucleotide pairs on chromosome #22. Each chromosome contains a specific set of genes, as well as regulatory elements and other nucleotide sequences, making each chromosome essential to survival. Q: How many sets of chromosomes does each somatic cell have? Choices: - one - four - six - two A:
A: two

Q: Answer the following question given this paragraph: Photosynthesis is the base of nearly all food chains on Earth. This is true of marine food chains, too. Q: What is the base of nearly all food chains on earth? Choices: - glycolysis - atherosclerosis - synthesis - photosynthesis A:
A: photosynthesis