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3 years ago

Economic importance of an insects

Biology

1 answer:

olga_2 [115]3 years ago

7 0

Answer:they make useful substances, including: wax, honey, laquer, and silk

Explanation:

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Explain what structure A in the picture above does during DNA Replication?

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Answer:

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3 years ago

Recall the name for the total amount of living matter in each trophic level of an ecological pyramid.

julsineya [31]

The correct answer would be Biomass. Biomass is the term for the total amount of living matter in each trophic level of an ecological pyramid. In other words, biomass is considered as the total mass of an organism in a given area.

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4 years ago

How might a dramatic decrease in vegetation lead to a decrease in a prey species?

schepotkina [342]

How might dramatic decrease in vegetation lead to a decrease in prey species? If there is less vegetation, herbivores won't be able to eat anything, so they won't have enough energy to escape from predators. ... A parasite lives on or inside the organism , but a predator kills and consumes its prey.

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4 years ago

Select ALL the correct answers.

tekilochka [14]

Answer:

(b) The interquartile range of B is greater than the interquartile range of A.

(d) The median of A is the same as the median of B.

Explanation:

Given

$A = \{1, 4, 2, 2, 3, 1, 1, 2, 1\}$

$10th\ run = 9$

So:

$B = \{1, 4, 2, 2, 3, 1, 1, 2, 1,9\}$

Required

Select all true statements

(a) & (d) Median Comparisons

$A = \{1, 4, 2, 2, 3, 1, 1, 2, 1\}$ $B = \{1, 4, 2, 2, 3, 1, 1, 2, 1,9\}$

$n = 9$ $n = 10$

Arrange the data:

$A = \{1, 1, 1, 1, 2, 2, 2,3, 4\}$ $B = \{1,1,1,1,2,2,2,3,4,9\}$

$Median = \frac{n + 1}{2}th$

$Median = \frac{9 + 1}{2}th$ $Median = \frac{10 + 1}{2}th$

$Median = \frac{10}{2}th$ $Median = \frac{11}{2}th$

$Median = 5th$ $Median = 5.5}th$ --- average of 5th and 6th

$Median = 2$ $Median = \frac{2+2}{2} = 2$

Option (d) is correct because both have a median of: 2

(b) & (c) Interquartile Range Comparisons

$A = \{1, 1, 1, 1, 2, 2, 2,3, 4\}$ $B = \{1,1,1,1,2,2,2,3,4,9\}$

$n = 9$ $n = 10$

First, calculate the lower quartile (Q1)

$Q_1 = \frac{n + 1}{4}th$ [Odd n] $Q_1 = \frac{n}{4}th$ [Even n]

$Q_1 = \frac{9 + 1}{4}th$ $Q_1 = \frac{10}{4}th$

$Q_1 = \frac{10}{4}th$ $Q_1 = 2.5$

$Q_1 = 2.5th$

This means that:

$Q_1 = 2nd + 0.5(3rd - 2nd)$ $Q_1 = 2nd + 0.5(3rd - 2nd)$

$Q_1 = 1 + 0.5(1- 1)$ $Q_1 = 1+ 0.5(1 - 1)$

$Q_1 = 1$ $Q_1 = 1$

Next, calculate the upper quartile (Q3)

$Q_3 = \frac{3}{4}(n + 1)th$ [Odd n] $Q_3 = \frac{3}{4}(n)th$ [Even n]

$Q_3 = \frac{3}{4}(9 + 1)th$ $Q_3 = \frac{30}{4}th$

$Q_3 = \frac{30}{4}th$ $Q_3 = 7.5th$

$Q_3 = 7.5th$

This means that:

$Q_3 = 7th + 0.5(8th- 7th)$ $Q_3 = 7th + 0.5(8th- 7th)$

$Q_3 = 2 + 0.5(3- 2)$ $Q_3 = 2+ 0.5(4 - 2)$

$Q_3 = 2.5$ $Q_3 = 3$

The interquartile range is $IQR = Q_3 - Q_1$

So, we have:

$IQR = 2.5 - 1$ $IQR = 3 - 1$

$IQR = 1.5$ $IQR =2$

(b) is true because B has a greater IQR than A

(e) This is false because some spread measures (which include quartiles and the interquartile range) changed when the 10th data is included.

The upper quartile and the interquartile range of A and B are not equal

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3 years ago

Imagine that you are looking into a microscope and you see a cell plate beginning to for across the middle of a cell. You also s

Whitepunk [10]

Answer:

A plant cell in the process of cytokinesis

Explanation:

Formation of a cell plate occurs during cytokinesis in cell division in plant cells. They form across the middle of a cell that has undergone division into two daughter cells acting to separate these two daughter cells from each other.

Thus, observation of a nuclei forming on either side of the cell plate indictes a plant cell undergoing the process of cytokinesis.

4 0

3 years ago

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Economic importance of an insects​

Economic importance of an insects