With biology answer
question 2
substance a is converted to substance b in a metabolic reaction. which statement best describes the role of an enzyme during this reaction?

a
it adjusts the ph of the reaction medium.

b
it provides energy to carry out the reaction.

c
it speeds up the reaction without being consumed.

question 3
a scientist observes that when the ph of the environment is changed, the reaction rate of an enzyme greatly decreases.

which statement best describes how a change in ph can affect an enzyme?

a
a ph change can cause the enzyme to change its shape.

b
a ph change can remove energy necessary to activate an enzyme.

c
a ph change can add new molecules to the structure of the enzyme.

which term describes reactions that involve the absorption of energy?

a
catabolic

b
endergonic

c
exergonic
question 6
organic compounds contain bonds between what types of atoms?
a
oxygen

b
carbon

c
hydrogen
the reaction shown below is known as what type of reaction?
reactants -> products + heat
a
activation

b
enzymes

c
exothermic
question 9
what happens when an enzyme is exposed to a temperature that is too high?

a
the enzyme becomes denatured.

b
the enzyme functions normally.

c
the substrates can bind to the active site faster.

question 10
a catalyst is a substance that does what?

a
it speeds up a chemical reaction, but is consumed in the process.

b
it slows down a chemical reaction, without being consumed in the process.

c
it speeds up a chemical reaction, without being consumed in the process.

question 11
what is the energy required to get a reaction started called?

a
activation energy

b
adhesion energy

c
chemical energy

d concave shape of wave rock

explanation:

the concave shape of wave rock is a very good evidence that supports the evolution of earth due to chemical weathering. if we talk about structure of   wave rock, studies have estimated that it is around 2.7 billion years old. it also serves as the foundation of evidence that it was the place where australian continent began to form.

how the structure of wave rock was created?

studies suggest that structure of wave rock was created when the surrounded area was started to weather due to which deposition of material started on the part of land which now contains wave rock.

the structure of wave rock is considered to be one of the best-known landforms in australia. at the height of around 15 cm, there can be found flared slopes which formulate the margins of hyden rock. it is now assumed by geologists that wave rock was created by subsurface water-induced weathering and not by glaciers, waves or wind.

due to deposition of material over the period of long time, the wave rock became tougher and tougher due to weathering from surrounding terrain. this makes it a physical evidence that supports   the evolution of earth due to chemical weathering.

hope it !

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.