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3 years ago

6

Scenario: A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his flowers

1 answer:

neonofarm [45]3 years ago

4 0

Answer:

1. Scientific question: Can detergent affect flower growth?

2. IV: The soap used in the study

3. DV: Flower growth

Explanation:

A scientific question is a well-sustained question about a given phenomenon of the real world which can be answered by experimental and/or observational procedures. A good scientific question must be testable and lead to falsifiable hypotheses. The dependent variable is the variable that is being measured in the experiment, (i.e. it is being affected by the experimental procedure). On the other hand, the independent variable is the variable that isn't changed by the other variables that are being measured in the experiment.

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A group of students were asked to study and record the movement of amoeba to try and determine how they move. The group knew tha

yan [13]

Answer:

B. Scanning Electron Microscope

Explanation:

We know that C and D just take pictures but are not able to be compared to one another so in conclusion These answer choices are out of the question and I believe for it to be B.

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3 years ago

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Which is an example of the environment affecting gene expression?

ivolga24 [154]

Answer:

b

Explanation:

some genes being turned off in warm temperatures

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3 years ago

In humans there is a dominant allele (A) for the absence of moles; while the recessive allele (a) results in the presence of mol

Art [367]

Answer:

a. $(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

b. i. 0.75

ii. 0.000061

iii. 0.012

iv. 0.17

c. 0.67

Explanation:

a. The expansion of the binomial (p + q)7 would be such that:

$(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

b. Both couples are heterozygous:

Aa x Aa

AA Aa Aa aa

Since A is dominant over a,

probability of having mole (aa) = 1/4

probability of not having moles = 3/4

<em>Therefore, the probability of the first child not having moles </em>= 3/4 or 0.75

ii. Let the probability of not having mole = p and the probability of having mole = q. From the binomial expansion:

$(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

<em>Probability that all of the children will have moles </em>= $p^0q^7$

since p = 3/4 and q = 1/4

$p^0q^7$ = $(3/4)^0(1/4)^7$ = 0.000061

iii. <em>Probability that the first two children will have no moles and the last five will have moles</em> = $21p^2q5$

= $21(3/4)^2(1/4)^5$

= 0.012

iv. <em>Probability that 4 will have no moles and 3 will have moles out of the 7 children</em> = $35p^4q^3$

= $35(3/4)^4(1/4)^3$

= 0.17

c. <em>Probability that the child born without moles is a carrier of the a-allele = probability of heterozygou</em>s.

From the cross in (b), the genotypes of those born without moles are AA and 2Aa. Therefore, the probability of not having moles and be Aa is:

= 2/3 or 0.67

8 0

3 years ago

NEED IT ASAP ! ! ! What type of deposition would create sand dunes? Earth/Environmental Science

snow_tiger [21]

Answer:

Earth deposition, wind would blow the sand and have it pile up

Explanation:

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Which cells are responsible for attacking, adhering, engulfing, and digesting foreign bodies?

7nadin3 [17]

Phagocytes are cells that protect the body by ingesting (phagocytosing) harmful foreign particles, bacteria, and dead or dying cells

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