Notes before we start solving:
+ve number * +ve number = +ve number
-ve number * -ve number = +ve number
+ve number * -ve number = -ve number
Now, the expression we have is:
<span>(3x – 5)(–x + 4)
The distributive property gives us:</span>
<span> (3x)(–x) + (3x)(4) + (–5)(–x) + (–5)(4)</span>
Now, to simplify this expression, we will multiply the terms as follows:
-3x^2 + 12x + 5x - 20
This will give us a final result:
-3x^2 + 17x - 20
Answer:
D
Explanation:
The correct answer would be that the origin of all cells can be traced to previous or pre-existing cells.
According to the cell theory which is made up of three parts;
- <em>The cell represents the basic unit of all life.</em>
- <em>All living organisms are made up of cells.</em>
- <em>Cells do not arise spontaneously, but only from pre-existing cells.</em>
Hence, the discovery that the origin of all cells is traceable to previously existing cells supports the latter part of the cell theory.
The correct option is, therefore, D.
Answer: primarily producing proteins in the cytosol
Explanation:
Answer:
The correct answer is A) differentiated cells retain all the genes of the zygote
Explanation:
A plant can be cloned from the somatic cells which shows that the differentiated cell of plants have the ability to divide and differentiate to produce a new plant. This property of the cell is called totipotency.
All the cells in plants are not totipotent but some cells under proper condition can show the property of totipotency. Totipotency property shows that the differentiated cell is having all the genes that were present in the zygote.
This property of plant cells is used by scientist in plant tissue culture to produce plants for research and other purposes. So the right answer is A.
Answer:
Diamond-
Physical identification characters:
Color- White or Colorless
Lusture - admantine
Streak - Colorkess
Habit - Hour glass structure
Hardness - 10
Cleavage- octaheadral
Composition- pure carbon
Specific gravity-3.5
Dolomite (CaMg(CO3)2
Color - Colorless or white
Hardness is between 3-4
Reacts with any acid
Gneiss
Light and dark strip or banding present alternatively
biotite , pyroxene have Mafic mineral shows dark banding
Quartz, Feldspar have Felsic mineral for light banding
High grade metmorphic rock which is formed due to regional metamorphism of lower grade rock
Chalk(CaCO3)
Color-White
Very fragile
Hardness-1
With acid gives effervescence.
