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What is the role of succession and how does this maintain ecosystems?

Succession is the term given to describe the changes that take place within an ecosystem. Barren land such as bare rock can be formed by the eruption of a volcano or a glacier retreating. The first stage of ...
PV
Answered by Pankti V. • Biology tutor
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Why can there be one major product and one minor product after electrophilic addition takes place across a double bond?

This formation of a major product and minor product only occurs if the double bond is unsymmetrical (when the carbon atoms involved in the double bond are bonded to different groups), for example in butene. ...
CF
Answered by Craig F. • Chemistry tutor
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Expand 3(5a-2)

A) 15a - 2 B) 8a - 2 C)9a D)15a - 6 D is correct - multiply each term in the bracket by what is outside the bracket. The other 3 answers show different mistakes, identifying the different areas of improvement.
AJ
Answered by Alex J. • Maths tutor
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Solve for x : 2x-15=-2x-7

Bring the x terms onto one side of the equation, and the numbers onto the other, rearranging to get 4x=8divide both sides by 4 to get x=2check answer by subbing x=2 into the equation, such that -11=-11
JP
Answered by Jack P. • Maths tutor
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Solve these simultaneous equations and find the values of x and y. Equation 1: 2x + y = 7 Equation 2: 2x - y - 4 = 4 – x

Simultaneous equations are two equations with two unknowns. And they can be solved by either elimination or substitution method.For this example, we will use the elimination method. First of all to make it e...
AC
Answered by Ashwin C. • Maths tutor
4478 Views