Answer:
There are 4 different fundamental states of matter: solid, liquid, gas, and plasma.
The atoms/molecules that make up a solid are packed <u>tightly</u> together and arranged in regular, repeating patterns. They are held firmly in place by their attractive forces and their <u>low kinetic energies</u> but do vibrate within a limited area. Solids, have a <u>fixed</u> shape and volume.
In liquids, the atoms/molecules have a moderate kinetic energy and flow easily around one another. They are kept from flying apart by attractive forces between them. Liquids have a fixed <u>volume</u> but assume the <u>shape</u> of their containers.
Atoms/molecules in gases fly in all directions at great speeds. Due to this <u>high</u> kinetic energy, attractive forces between them are <u>insignificant</u>. Gases assume the volume and shape of their containers.
Lastly, plasma is the state of matter with the highest thermal energy. It is made up of free electrons and the positive ions from which they came. The electrons freely move around within this system of positive ions in a similar way to <u>gases</u> . Plasmas are strongly influenced by electric and magnetic fields due to the charged particles.
Answer: A. Archaea lack peptidoglycan.
Species of bacteria are named gram-positive because of their positive respond towards gram staining technique. These bacteria retain the crystal violet dye and are colored pink or purple because of the presence of thick layer of peptidoglycan in their cell walls, whereas the gram-negative bacteria has thin layer of peptidoglycan hence, cannot retain the stain of the dye. Archaea species do not possess peptidoglycan in their cell wall, therefore will give negative response to gram staining technique, hence, there are no gram-positive Archaea species.
The right answer is A.Transcription uses uracil.
The genes carried by the DNA will be encoded in another form: messenger RNA, during a process called "transcription".
The DNA and RNA molecules are chemically very close, but the second has an extra oxygen (in red on the right of the letters) on the sugars (riboses) that make up its nucleotides (the DNA actually contains deoxyribose). In addition, the thymine (T) of DNA is replaced by uracil (U) in RNA.
