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Answer:
c. Ribosomes
Explanation:
Ribosomes can be found in eukaryotic and prokaryotic cells. In eukaryotes they are distributed by the cytoplasm, or trapped in the membranes of the endoplasmic reticulum. In prokaryotes they are found free in the cytoplasm. In both cells, ribosomes intertwine into an RNA molecule and form polysomes.
Ribosomes are made up of two subunits, the two parts are made up of RNA molecules and proteins. This molecule has the main function of protein synthesis, that is, it is through it that aminoacids reconcile to produce proteins.
Eukaryotic cells contain membrane-bound organelles, including a nucleus. Eukaryotes can be single-celled or multi-celled, such as you, me, plants, fungi, and insects. Bacteria are an example of prokaryotes. Prokaryotic cells do not contain a nucleus or any other membrane-bound organelle.
There are several key differences between prokaryotic and eukaryotic cells. Eukaryotic cells are found in multicellular plants and animals, whereas prokaryotic cells are found in bacteria and archaea which are ususlly unicellular. I have summarised the key differences below:
Prokayotic cells do not have membrane-bound organelles, such as the endoplasmic reticulum or mitochondria.
Prokaryotic cells do not have a nucleus, instead they have circular DNA that is free in the cytoplasm.
Prokaryotic cells have smaller ribosomes than eukaryotic cells.
Prokaryotic cells have a cell wall. Their cell wall is made from a different material to a plant cell, a glycoprotein called murein.
Prokaryotic cells may also have a protective layer called a capsule, flagellum to aid in movement and one or more plasmids.
Answer:
smelling rotten eggs - covering your nose
touching a hot dish - pulling your hand away
jumping into a cold pool - shivering
Explanation:
<u>A stimulus generally refers to a detectable change in the environment of an organism. These changes could be physical or chemical and could be in the internal or external environment of organisms. </u>
Organisms react to changes in their internal or external environment by responding appropriately. Hence perceiving the smell of rotten egg, feeling the hotness of a dish by touching it, and feeling cold immediately one jumps into a cold pool are all examples of stimuli and their corresponding responses would be covering one's nose, pulling the hand away, and shivering of the body in order to counter the cold.
In other words:
<em>smelling rotten eggs - covering your nose</em>
<em>touching a hot dish - pulling your hand away</em>
<em>jumping into a cold pool - shivering</em>
Sea anemone's stomach serves as a "circulatory system" because it is a <span> gastrovacular system.</span>
