Answer:
A water molecule consists of two hydrogen atoms attached to one of oxygen and its general structure is angular. This is because the oxygen atom, in addition to forming bonds with hydrogen atoms, has two pairs of non-shared electrons.
Answer:
Asexual reproduction does not involve the fusion of gametes or change in the number of chromosomes. Sexual reproduction involves combining genetic information from two individuals of different sexes. Asexual reproduction results in offspring that are genetically identical or mostly identical.
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Answer:
Among Sponges and Cnidarians, the difference among given facts is in "Have a network of nerve cells".
Explanation:
Both Sponges and Cnidarians have pores, they reproduce by buddings, and they live in freshwater. The major difference in both organisms is that: cnidarians have very simple nervous system made of sensory nerves that are arranged in the form of neural network. On the other hand, sponges are simple multicellular organisms without any neural network at all. In fact, they are the only multicellular organisms (animals) without a nervous system.
For the first one, electrons travel around the nucleus in fixed energy levels with varying energies.
Second one, protons, neutrons, and electrons have a mass, but electrons have far less mass
Third one, cations and protons
Fourth, not sure.
Answer:
Paper is not a natural resource
