Ques: Q: The fertilized egg that sexually reproducing organisms begin life as is known as what? Read this paragraph and choose the correct option from the provided answers: Introduction The individual sexually reproducing organismincluding humansbegins life as a fertilized egg, or zygote. Trillions of cell divisions subsequently occur in a controlled manner to produce a complex, multicellular human. In other words, that original single cell was the ancestor of every other cell in the body. Once a human individual is fully grown, cell reproduction is still necessary to repair or regenerate tissues. For example, new blood and skin cells are constantly being produced. All multicellular organisms use cell division for growth, and in most cases, the maintenance and repair of cells and tissues. Single-celled organisms use cell division as their method of reproduction. Choices: - gamete - fetus - infant - zygote A:
Ans: zygote

Ques: Q: What gas is released into the atmosphere when fossil fuels are burned? Read this paragraph and choose the correct option from the provided answers: Carbon dioxide levels in the atmosphere are increasing. Fossil fuel burning is increasing. The rise in fossil fuel burning is increasing the CO 2 in the atmosphere. Choices: - hydrogen - glucose - helium - co2 A:
Ans: co2

Ques: Q: A low level of radiation occurs naturally in the environment and is called what? Read this paragraph and choose the correct option from the provided answers: A low level of radiation occurs naturally in the environment. This is called background radiation. One source of background radiation is rocks, which may contain small amounts of radioactive elements such as uranium. Another source is cosmic rays. These are charged particles that arrive on Earth from outer space. Background radiation is generally considered to be safe for living things. You can learn more about background radiation with the animation at this URL: http://www. pbs. org/wgbh/nova/dirtybomb/sources. html. Choices: - Gamma radiation - Beta radiation - Alpha radiation - background radiation A:
Ans: background radiation

Ques: Q: What reproductive part is stored in a plant's pollen? Read this paragraph and choose the correct option from the provided answers: Plants can also reproduce sexually, but their reproductive organs are different from animals' gonads. Plants that have flowers have their reproductive parts in the flower. The sperm is contained in the pollen, while the egg is contained in the ovary, deep within the flower. The sperm can reach the egg two different ways:. Choices: - the gamete - the mimic - the egg - the sperm A:
Ans:
the sperm