Answer: D. Keratin
Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.
" a boat sails across the ocean" possess Kinetic energy. hence option d is correct.
<h3>
What is Kinetic energy?</h3>
- Chemical energy, thermal energy, electromagnetic radiation, gravitational energy, electric energy, elastic energy, nuclear energy, and rest energy are only a few of the many different types of energy that exist. Potential energy and kinetic energy are the two basic categories that can be used to group them.
- An object's kinetic energy is what drives its motion. Kinetic energy can be converted into other types of energy and transported between objects.
- The energy an object has as a result of motion is known as kinetic energy in physics. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration until its speed changes.
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How does the whole question go?
Unlike ionic bonds, covalent bonds involve the sharing of electrons between atoms.
- - Final answer: <span>b. sharing of electrons between atoms.</span>
Plants are autotrophs because they can prepare their own food. Photosynthesis takes place in leaves which contain stomata that allow for the exchange of gases.
<h3>What do you mean by Photosynthesis?</h3>
Photosynthesis may be defined as the process that converts carbon dioxide into glucose in the presence of sunlight.
Leaves of plants possess stomata through which the exchange of gases and loss of water takes place. These pores in the leaves of plants also help in the process of transpiration.
Therefore, it is well described above.
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