The heart is a pump, usually beating about 60 to 100 times per minute. With each heartbeat, the heart sends blood throughout our bodies, carrying oxygen ... It sends out an electrical signal to start the contracting (pumping) of the heart muscle.

Explanation:

6 0

3 years ago

The lesson question for this lab is “What is the effect of the type of food available on the frequency of different types of bir

Effectus [21]

Answer:

Hypothesis If the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

Explanation:

4 0

3 years ago

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To best display the distribution of sex (male, female, other), we could use:

topjm [15]

Answer:

i guess it's gender

hope this helps

6 0

3 years ago

_____ if this is too wet or compacted, there is less space for air. Root s also respirate so this can reduce the amount of oxyge

Kisachek [45]

Answer: Soil

Explanation: hope this helps!!

5 0

1 year ago