I know for a fact c is one of the correct answers and I also think b is the other correct one
Cancer cells can arise in a variety of ways, the most common, however, tends to be genetic mutations.
Genetic mutations can occur during the life of a cell due to outside factors such as:
- The <u>food </u>we eat
- The <u>environment </u>we expose the cell to
- The <u>substances </u>that touch the cell (e.g skin cells)
That being said, the most common time for a genetic mutation to take place is during cellular division. During this time the DNA that encodes the cells is duplicated. Genetic mutations in this DNA sometimes cause the elimination of <u>programmed cell death</u>.
<u>Programmed cell death </u>is what tells a cell when it should stop growing and dividing. This is a <u>regulatory function </u>designed to keep the number of cells at a balance, growing only when needed. As this cell multiplies, this produces an increasing number of cells that will not die. The <u>accumulation </u>of these cells is referred to as cancer.
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Tundra - The coldest land biome is found near Earths north and south poles. It has no trees but has low, slow growing vegetation with permafrost below the topsoil. The tundra usually receives less than 25 cm of precipitation annually.
Answer:
Whether matter exists as a solid, liquid or gas is determined by the arrangement of its particles and the strength of attraction between the particles. The three states can be easily distinguished because of their physical properties.
A physical property is a characteristic of matter which can be observed without any chemical change to the matter (shape, volume, colour, smell etc.). A chemical change is one in which new substance are formed.
Explanation:
Solids have <u>a fixed volume and shape</u>. They also vibrate in a fixed position. Ice
Liquids have <u>do not have a fixed shape but a definite volume</u>. They take the shape of their container. They are able to move past each other by allowing the liquid to flow. Water
Gases <u>do not have a fixed shape or volume</u>. Particles take up the space of the container they are in. Particles move freely and rapidly. Water vapour
*my gas picture isn't sending sorry