Answer the following question given this paragraph: Q: Behind the pupil, a single lens focuses light on a layer of what? Choices: - photons - chloroplasts - electrons - photoreceptors A:
photoreceptors

Answer the following question given this paragraph: Eukaryotes evolved about 2 billion years ago. Unlike prokaryotes, eukaryotes have a cell nucleus. They have more structures and are better organized. Organelles within a eukaryote can perform certain functions. Some supply energy; some break down wastes. Eukaryotes were better able to live and so became the dominant life form. Q: Unlike prokaryotes, eukaryotes have what? Choices: - cell membrane - golgi apparatus - cell wall - cell nucleus A:
cell nucleus

Answer the following question given this paragraph: Q: Flow of what can introduce alleles that are advantageous or ones that are disadvantageous? Choices: - babies - eggs - larvae - genes A:
genes

Answer the following question given this paragraph: Polarization leads to the buildup of electric charges on objects. This buildup of charges is known as static electricity . Once an object becomes charged, it is likely to remain charged until another object touches it or at least comes very close to it. That's because electric charge cannot travel easily through air, especially if the air is dry. Q: What leads to the buildup of electric charges on objects? Choices: - movement - gravity - rotation - polarization A:
polarization