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zlopas [31]
3 years ago
11

What begins the combustion phase of a four-stroke engine cycle? A B C D​

Chemistry
2 answers:
RoseWind [281]3 years ago
8 0

Answer:

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D.

vesna_86 [32]3 years ago
6 0

Answer: D

Explanation: The engine cycle begins with the intake stroke as the piston is pulled towards the crankshaft (to the left in the figure). The intake valve is open, and fuel and air are drawn past the valve and into the combustion chamber and cylinder from the intake manifold located on top of the combustion chamber.

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What type of wave do the contractions of the snake muscles make as the snake moves forward
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Concertina - vermiform. Circular muscles around the snake squeeze the front of the snake's body out long, then the latter half is pulled forward. 

Rectilinear crawling - Belly scutes are moved forward individually in a wave-like motion. 

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Lateral undulation - Most common form of movement. Snake presses on alternating pressure points to force body forward (or backward)

(taken from a user on Yahoo from Correct Answers)
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What happens when an ecosystem reaches the maximum number of individuals it can support
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Answer:

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slamgirl [31]
1.5 sorry if I’m wrong!
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