Mass does remain constant. A is true.
Only the form changes. ( I take that means that a solid is different from a liquid) and that is also true.
Kinetic energy changes. This one is kind of iffy. that means that the temperature will change. Temperature is a measurement of KE. If the change is so much as 1 degree or 1/2 a degree or a millionth of a degree, this is true. It's not very likeable though.
The last one is false. Chemical reactions produce new things. State change only produces something going (say) from a liquid to a solid. There's nothing new being created.
Answer D
Answer:
Evidences of evolution are categorized as follows -
- Direct observation of evolutionary change
- Homology and development
- Fossil record and biogeograhy
- Vestigeal organs
Explanation:
Evolutionary changes can be observed either in nature or at a small scale in laboratory by the conditions experimentally generated. For example we can take an organism which has small life span like <em>Drosophila</em> and artificially produce earliest environment like conditions to observe how its development is affected.
Homology supports the common ancestry of the organisms. Homologous structures are formed from a common ancestor. Even if these are structurally different, developmentally they are related.
Fossil records are the most important evidences that document changes in the organisms in the course of time. Sedimentary rocks are the most rich sources of fossils.
Some structural or genetic features serve no apparent purposes. These are called vestigial organs. But as these are present in the organism they show that these are functional in the early forms of that organism.
Cell is limited in size for many reasons. Cells wouldn't be respire effectively if it were too large, because the surface area to the volume ratio would be too small.
The other thing is that if the cell were too large, it would be difficult for it to move nutrients and waste products in and out of the cell. So, cells are limited in size.
Answer:
The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere
Explanation:
Look it Up :)
