Q: What is the name for compounds that contain only carbon and hydrogen? Read this paragraph and choose the correct option from the provided answers: The fuel that burns in a combustion reaction contains compounds called hydrocarbons. Hydrocarbons are compounds that contain only carbon (C) and hydrogen (H). The charcoal pictured in the Figure above consists of hydrocarbons. So do fossil fuels such as natural gas. Natural gas is a fuel that is commonly used in home furnaces and gas stoves. The main component of natural gas is the hydrocarbon called methane (CH 4 ). You can see a methane flame in the Figure below . The combustion of methane is represented by the equation:. Choices: - particles - carbohydrates - carbides - hydrocarbons A:
hydrocarbons

(Question)
Q: Most reptiles reproduce sexually and have what type of fertilization? Read this paragraph and choose the correct option from the provided answers: Most reptiles reproduce sexually and have internal fertilization. Choices: - additional - external - mechanical - internal A:
(Answer)
internal

Ques: Q: What is the term for cellular eating? Read this paragraph and choose the correct option from the provided answers: Phagocytosis , or cellular eating, occurs when the dissolved materials enter the cell. The plasma membrane engulfs the solid material, forming a phagocytic vesicle. Choices: - Pinocytosis - consumption - ancylosis - phagocytosis A:
Ans: phagocytosis

(Q).
Q: What is the structure in a diploid sporophyte that undergoes meiosis to form haploid spores? Read this paragraph and choose the correct option from the provided answers: A general plant life cycle is represented by the diagram in Figure below . From the figure, you can see that the diploid sporophyte has a structure called a sporangium (plural, sporangia) that undergoes meiosis to form haploid spores. A spore develops into a haploid gametophyte. The gametophyte has male or female reproductive organs that undergo mitosis to form haploid gametes (sperm or eggs). Fertilization of gametes produces a diploid zygote. The zygote grows and develops into a mature sporophyte, and the cycle repeats. Choices: - hymenium - dikaryotic - hyphae - sporangium A:
(A).
sporangium

Ques:Q: What is the breakdown of unstable elements into stable elements called? Read this paragraph and choose the correct option from the provided answers: Radioactive decay is the breakdown of unstable elements into stable elements. To understand this process, recall that the atoms of all elements contain the particles protons, neutrons, and electrons. Choices: - initial decay - thermal decay - radioactive decrease - radioactive decay A:

Ans:radioactive decay

Q: Energy that is stored in a person or object is called? Read this paragraph and choose the correct option from the provided answers: Potential energy is energy that is stored in a person or object. Choices: - vertical energy - mechanical energy - kinetic energy - potential energy A:
potential energy