Ques: Q: Bone marrow, the thymus gland, the spleen, and the tonsils are organs in what body system? Read this paragraph and choose the correct option from the provided answers: Immune system organs include bone marrow, the thymus gland, the spleen, and the tonsils. Each organ has a different job in the immune system. Choices: - skeletal system - nervous system - reproductive system - immune system A:
Ans: immune system

Ques: Q: The actinides are all what type of elements? Read this paragraph and choose the correct option from the provided answers: actinide: The actinides are the 14 elements from thorium (atomic number 90) to lawrencium (atomic number 103). The sublevel is in the process of being filled. The actinides are all radioactive elements and only the first four have been found naturally on Earth. Choices: - large - nuclear - multiple - radioactive A:
Ans: radioactive

Ques: Q: How do the vast majority of fish reproduce? Read this paragraph and choose the correct option from the provided answers: Nearly all fish reproduce sexually, and most species have separate sexes. Those without separate sexes avoid self-fertilization by producing sperm and eggs at different times. Each fish typically produces a large number of gametes. In most fish species, fertilization takes place externally. These fish are oviparous . Eggs are laid and embryos develop outside the mother's body. In a minority of fish, including sharks, eggs develop inside the mother's body but without nourishment from the mother. These fish are ovoviviparous . Choices: - by budding - asexually - cloning - sexually A:
Ans: sexually

Ques: Q: Several neuropeptides, relatively short chains of amino acids, serve as neurotransmitters that operate via metabotropic what? Read this paragraph and choose the correct option from the provided answers: Choices: - lipids - membranes - organelles - receptors A:
Ans:
receptors