The answer would be B) Sponges, corals, worms, insects, spiders and crabs are all sub-groups of the invertebrate.
Answer:
Calcium ions
Explanation:
For muscle contraction to occur, Troponin, a regulatory protein which regulates the tropomyosin, is activated by calcium ions, and is kept at extremely low concentrations in the sarcoplasm. If these calcium ions are released from the sarcoplasm by signals from neurotransmitters, calcium ions bind to troponin, causing conformational changes in troponin that allows tropomyosin to uncover the myosin-binding sites on actin. Tropomyosin a regulatory protein on the myofibril (composed of actin and myosin filaments) must change its conformation and uncover the myosin-binding site (it hides the binding site) on an actin molecule, thereby allowing cross-bridge formation between the actin and the myosin head. Once the tropomyosin is removed, a cross-bridge can form between actin and myosin, triggering muscle contraction.
Answer:
2-(hydroxymethyl)-1, 3-oxathiolan-5-yl group.
Explanation:
2-(hydroxymethyl)-1,3-oxathiolan-5-yl group is a functional group of Emtricitabine. Emtricitabine is an antiviral medicine that treat human immunodeficiency virus (HIV) disease by preventing multiplication in your body. Emtricitabine comprise of organofluorine compound in which 5-fluorocytosine is substituted at the 1st position by a 2-(hydroxymethyl)-1,3-oxathiolan-5-yl group.
Answer:
The forces of gravity consantly move materials such as debris and sendiments that lead to the creation of landforms such as landslides and mudflows.
Explanation:
Gravity plays an important and fundamental role in the creation of landforms. Its force produces erosion in direct and indirect ways. For instance, a landslide is created by the movement of sediments and rocks that is influenced by the force of gravity as it pulls these materials downhill.
Moreover, the forces of gravity also cause a type of landform known as a mudflow, which refers to a type of mass wasting caused by the rapid movement and flow of debris. In this case, the constant force of gravity moves weathered materials first from higher regions to lower ones, creating a mudflow.
