How does an amoeba compare with a red blood cell? (1 point)
Responses
They are both organisms.
They are both organisms.
An amoeba is responsible for one function, and a red blood cell is responsible for all functions.
An amoeba is responsible for one function, and a red blood cell is responsible for all functions.
They both have pseuopods.
They both have pseuopods.
An amoeba is responsible for all functions, and a red blood cell is responsible for some function
An amoeba and a red blood cell both have pseuopods. An amoeba is responsible for all functions, while a red blood cell is only responsible for carrying oxygen and removing carbon dioxide. So, the correct response is: An amoeba is responsible for all functions, and a red blood cell is responsible for some function.
Unicellular and Multicellular Quick Check
4 of 44 of 4 Items
Question
Which statement is correct about a euglena and a white blood cell? (1 point)
Responses
Neither a euglena or a white blood cell can survive on their own.
Neither a euglena or a white blood cell can survive on their own.
Both a euglena and a white blood cell can survive on their own.
Both a euglena and a white blood cell can survive on their own.
A euglena can survive on its own, but a white blood cell cannot.
A euglena can survive on its own, but a white blood cell cannot.
A white blood cell can survive on its own, but a euglena cannot.
A white blood cell can survive on its own, but a euglena cannot.
A euglena can survive on its own, but a white blood cell cannot.
What is 12815 − 7 + 715 + 15? Simplify your answer.(1 point.
12815 - 7 + 715 + 15 =
= 12822 + 715 + 15 =
= 13537 + 15 =
= 13552
So, 12815 - 7 + 715 + 15 simplifies to 13552.
What is 12 8/15 − 7 + 7/15 + 15? Simplify your answer.(1 point).
To solve the expression 12 8/15 - 7 + 7/15 + 15, we first need to convert the mixed number 12 8/15 into an improper fraction:
12 8/15 = (12 * 15 + 8) / 15 = 188/15
Now, substitute this back into the original expression:
188/15 - 7 + 7/15 + 15
To combine fractions, we need to have a common denominator. The common denominator of 15 and 1 is 15. Let's convert 7 to have a denominator of 15:
7 = (7 * 15) / 15 = 105/15
Now, substitute this back into the expression:
188/15 - 105/15 + 7/15 + 15
Now, we can add and subtract the fractions:
(188 - 105 + 7)/15 + 15 =
(90 + 7)/15 + 15 =
97/15 + 15
To add these fractions, we need a common denominator:
97/15 + (15*15/15) =
97/15 + 225/15 =
(97 + 225)/15 =
322/15
So, the simplified answer is 322/15.
How should you group the following expression to make it easiest to add? 18 − 9 4/9 + 7/9 − 8(1 point)
Responses
(18 − 8) + (−9 4/9 + 7/9)
Left Parenthesis 18 minus 8 Right Parenthesis plus Left Parenthesis negative 9 Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis
(8 − 18) + (4/9 + 7/9)
Left Parenthesis 8 minus 18 Right Parenthesis plus Left Parenthesis Start Fraction 4 over 9 End Fraction plus Start Fraction 7 over 9 End Fraction Right Parenthesis
(18 − 8 − 9)
Left Parenthesis 18 minus 8 minus 9 Right Parenthesis
(18 − 9 − 8) + (−4/9 + 7/9)
(18 − 8) + (−9 4/9 + 7/9)
This grouping allows us to first subtract 8 from 18, and then combine the fractions -9 4/9 and 7/9 together.
What should you do if a place value is missing a number?(1 point)
Responses
Subtract without it.
Subtract without it.
Remove the last digit(s) in the number that has the additional place values.
Remove the last digit(s) in the number that has the additional place values.
Add a zero.
Add a zero.
Nothing.
If a place value is missing a number, you should add a zero in its place.
What is −18.1−5?(1 point)
Responses
23.1
23.1
−23.1
negative 23.1
13.1
13.1
−13.1
negative 13.1
-18.1 - 5 = -23.1
So, the correct response is: -23.1.
What is −189.987−30.87?(1 point)
Responses
159.117
159.117
220.857
220.857
−220.857
negative 220.87
−159.117
-189.987 - 30.87 = -220.857
So, the correct response is: -220.857.
What is 8 − 7 1/4
To subtract 7 1/4 from 8, we need to convert both numbers to have the same denominator, which in this case is 4.
8 - 7 1/4 =
8 - (7 * 4 + 1) / 4 =
8 - (28 + 1) / 4 =
8 - 29/4
Now, to subtract a fraction from a whole number, we need to convert the whole number to a fraction with the same denominator:
8 = (8 * 4) / 4 = 32/4
Now substitute this back into the expression:
32/4 - 29/4 = (32 - 29) / 4 = 3/4
So, 8 - 7 1/4 equals 3/4.
What is −4 5/11 − 2 4/11?
To subtract -4 5/11 from -2 4/11, we need to convert both numbers to have the same denominator, which in this case is 11.
-2 4/11 - (-4 5/11) =
-2 4/11 + 4 5/11 =
-2 + 4 + (4/11 + 5/11) =
2 + (9/11) =
2 9/11
So, -4 5/11 - 2 4/11 equals 2 9/11.
What is −6 7/12 − 4 1/3?
To subtract -6 7/12 from -4 1/3, we need to convert both numbers to have the same denominator, which in this case is 12.
-4 1/3 - (-6 7/12) =
-4 1/3 + 6 7/12 =
-4 + 6 + (1/3 + 7/12) =
2 + (4/12 + 7/12) =
2 + 11/12
So, -6 7/12 - 4 1/3 equals 2 11/12.