Flagella are long, thread-like appendages which provide some live single cells with the ability to move, motility. Bacteria which have flagella are either rod or spiral-shaped and are known as bacilli and spirochetes, respectively. Cocci, or round bacteria, are almost all nonmotile. I hope this helps you :) I Have this in my Bio Notes
Explanation:
Astronomers have a huge problem detecting radiation from space because the Earth's atmosphere blocks most of it and stops it from reaching the surface. Visible light and radio waves get through to telescopes on the ground, and some detectors (infrared, UV and gamma) work when they are high up on mountains.
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The answer is; B and D
Tapeworms (Cestoda) are called flatworm (Platyhelminthes) while hookworms are roundworms (Nematodes). Both are parasites and live within the intestines of animals and feed on the nutrients digested in the organ. When these worms migrate to other parts of the body, they cause complications, The more of this parasite one has the heavier the symptoms they will exhibit – such as asthma-like symptoms.
