Answer the following question given this paragraph: The atomic number is the number of protons in an atom. This number is unique for atoms of each kind of element. For example, the atomic number of all helium atoms is 2. Q: The number of protons in an atom is called what? Choices: - mass number - metallic number - isotope - atomic number A:
atomic number
(Question)
Answer the following question given this paragraph: Sexual reproduction also occurs in virtually all fungi. This involves mating between two haploid hyphae. During mating, two haploid parent cells fuse, forming a diploid spore called a zygospore . The zygospore is genetically different from the parents. After the zygospore germinates, it can undergo meiosis, forming haploid cells that develop into new hyphae. Q: What type of reproduction occurs in almost all fungi? Choices: - fragmentation - budding - asexual - sexual A:
(Answer)
sexual
Ques: Answer the following question given this paragraph: During anaphase , sister chromatids separate and the centromeres divide. The sister chromatids are pulled apart by the shortening of the spindle fibers. This is like reeling in a fish by shortening the fishing line. One sister chromatid moves to one pole of the cell, and the other sister chromatid moves to the opposite pole. At the end of anaphase, each pole of the cell has a complete set of chromosomes. Q: During which phase do sister chromatids separate and the centromeres divide? Choices: - cell phase - gap cycle - passivation - anaphase A:
Ans: anaphase
(Q).
Answer the following question given this paragraph: Enzymes are needed to speed up biochemical reactions in organisms. They work by lowering activation energy. Q: What do organisms need to speed up biochemical reactions? Choices: - genes - carbohydrates - hormones - enzymes A:
(A).
enzymes
Ques:Answer the following question given this paragraph: Q: Although it is not vital to humans, calcitonin is important for calcium homeostasis in adults of some species in what group characterized by backbones? Choices: - mammals - reptiles - invertebrates - vertebrates A:

Ans:vertebrates
Answer the following question given this paragraph: Unlike bones and tendons, which need to be strong as well as elastic, the arteries and lungs need to be very stretchable. The elastic properties of the arteries are essential for blood flow. The pressure in the arteries increases and arterial walls stretch when the blood is pumped out of the heart. When the aortic valve shuts, the pressure in the arteries drops and the arterial walls relax to maintain the blood flow. When you feel your pulse, you are feeling exactly thisthe elastic behavior of the arteries as the blood gushes through with each pump of the heart. If the arteries were rigid, you would not feel a pulse. The heart is also an organ with special elastic properties. The lungs expand with muscular effort when we breathe in but relax freely and elastically when we breathe out. Our skins are particularly elastic, especially for the young. A young person can go from 100 kg to 60 kg with no visible sag in their skins. The elasticity of all organs reduces with age. Gradual physiological aging through reduction in elasticity starts in the early 20s. Q: What causes reduction of elasticity in all organs? Choices: - low vitamin D - radiation - weight gain - age A:
age