Q: Q: What term describes a way that small molecules or ions move across the cell membrane without input of energy by the cell? Read this paragraph and choose the correct option from the provided answers: Passive transport is a way that small molecules or ions move across the cell membrane without input of energy by the cell. The three main kinds of passive transport are diffusion (or simple diffusion), osmosis, and facilitated diffusion. Simple diffusion and osmosis do not involve transport proteins. Facilitated diffusion requires the assistance of proteins. Choices: - physical transport - impassive transport - immune transport - passive transport A:
A: passive transport

Q: Q: Centrioles are a very important part of what? Read this paragraph and choose the correct option from the provided answers: Centrioles are a very important part of centrosomes, which are involved in organizing microtubules in the cytoplasm. Centrosomes are associated with the nuclear membrane during prophase of the mitosis. In mitosis, the nuclear membrane breaks down and the microtubule organizing center (MTOC) of the centrosome arranges microtubules such that they interact with the chromosomes to build the mitotic spindle. Choices: - centricles - tubercles - enterocytes - centrosomes A:
A: centrosomes

Q: Q: Name the one metal that melts below room temperature? Read this paragraph and choose the correct option from the provided answers: Metals have a wide range of melting points, but most are quite high. Only one metal (mercury) melts below room temperature. Others (such as gallium) are solid at room temperature but would melt at body temperature, so they can be melted simply by holding them in your hand. On the other end of the spectrum, tungsten has a melting point of 3422C. Figure below shows the melting points of various elements in their most common pure form. Choices: - aluminum - gold - bronze - mercury A:
A: mercury

Q: Q: Sexual reproduction involves the production of haploid gametes by what? Read this paragraph and choose the correct option from the provided answers: Cycle of Sexual Reproduction. Sexual reproduction involves the production of haploid gametes by meiosis. This is followed by fertilization and the formation of a diploid zygote. The number of chromosomes in a gamete is represented by the letter n. Why does the zygote have 2n, or twice as many, chromosomes?. Choices: - lesions - mutations - mitosis - meiosis A:
A: meiosis