Ans.
Unicellular organisms are those organisms that are made up of a single cell, while multicellular organisms are made of up more than one cell. During 17th century, a scientist could distinguish between an unicellular and a multicellular organism by using simple microscope, developed by Antony Van Leeuwenhoek. In the mid-20th century and 21st Century, a scientist could make distinction between unicellular and multicellular organisms, by using advance microscopy techniques, such as electron microscopy and electron microscopy.
Juipter was almost massive enough to become a star.
Fossils records provide evidence about the history of life on Earth including how organisms have changed over time. It tells about the structures of ancient organisms, their environment, and the way they lived. However, fossils can not usually provide information about soft tissues of an organism because soft tissues rarely become fossilized. Additionally, fossils rarely provide information about interactions among organisms and therefore tell us little about animal behavior.
Answer:
Enzymes allow activation energies to be lowered.
Explanation:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering the activation energy.
Answer:
Negative feedback.
Explanation:
The normal carbon dioxide levels after resting, the breathing rate also decreases which is an example of negative feedback because the body moves towards stability or equilibrium conditions. There is a direct relationship between breathing rate and carbondioxide levels means if one is increases the other automatically increases in order to maintain homeostasis in the body so we can say that this relationship is very important to maintain .stability in the body