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Questions in biology
📝 Answered - Which of the following is true for a eukaryote? A. It is one of the first life forms to appear on Earth. B. It does not have a nucleus and organelles. C. It must be a unicellular organism. D. It evolved from prokaryotes and has a nucleus.
📝 Answered - True or false: Elastic cartilage is found in cartilaginous joints
📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
📝 Answered - Which is the best definition of directional selection? A. a process by which two species can no longer reproduce B. a process by which one of the extreme variations of a trait is favored C. a process by which both extreme variations of a trait are favored D. a process by which average individuals in a population are favored
📝 Answered - The sense of sight uses: A. Rods and cones B. Retinas and pupils C. Ear drums D. Taste buds
📝 Answered - Which three steps describe how an animal obtains and uses energy for growth? A. First, an animal eats another organism. Then, food is built into larger molecules. Next, the animal's cells use molecules to make new cells. B. First, food is built into larger molecules. Then, the animal eats another organism. Next, the animal's cells use molecules to make new cells. C. First, an animal eats another organism. Then, food is broken down into smaller molecules. Next, the animal's cells use molecules to make new cells. D. First, food is broken down into smaller molecules. Then, the animal eats another organism. Next, the animal's cells use molecules to make new cells.
📝 Answered - How is codominant inheritance different from incomplete dominant inheritance? A. In codominance, two alleles are expressed equally; in incomplete dominance, there is only one allele in the system. B. In codominance, two alleles are expressed equally; in incomplete dominance, heterozygotes have an intermediate phenotype. C. In codominance, one gene is recessive to two dominant genes; in incomplete dominance, all genes are recessive. D. In codominance, all genes are recessive; in incomplete dominance, one gene is recessive to two dominant genes. E. In codominance, the two alleles cooperate to make an intermediate phenotype; in incomplete dominance, the heterozygote shows the recessive phenotype.
📝 Answered - Which level of organization is characterized by a group of cells that work together to perform a common function? A. organ B. tissue C. organ system D. organism
📝 Answered - The heart is an example of which level of organization within an organism? A. cell B. organ C. tissue D. organ system
📝 Answered - Which best lists the end products of the light-dependent reactions of photosynthesis? A. ATP and NADPH B. $CO _2$ and $H _2 O$ C. ATP, NADPH, and $O _2$ D. $C _6 H _{12} O _6$ and $O _2$
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