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2 years ago

What idea did colleen cavanaugh discover through her research on deep-sea food webs?.

1 answer:

4 0

Colleen Cavanaugh discovery through her research on deep-sea food webs was the symbiotic role that bacteria play in chemosynthesis.

<h3>What is Symbiosis?</h3>

This is defined as the relationship between two different biological organisms in an ecosystem.

The symbiotic bacteria found inside the tubeworm uses hydrogen sulfide from the vents as an energy source for themselves and the worms which depicts a symbiotic relationship and was discovered by her.

Read more about Symbiosis here brainly.com/question/494031

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Which is the leading cause of blindness in the united states?

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Obama?????? i realy dont now

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3 years ago

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Which of the following is not a reason we become shorter as we age?

Lady_Fox [76]

Answer:

The correct answer is - As a person ages, scoliosis may develop resulting in an abnormal spinal curvature and shorter stature.

Explanation:

Scoliosis is a condition in which spine curvature towards the sides takes place before the puberty during growth period or spurt normally. The cause of this condition could be muscle dystrophy or palsy and similar condition.

This affects the stature of an individual but not affected by age as it remains constant normally after development or growth till puberty. All other conditions are associated with the short stature and influenced by the age.

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2 years ago

Who is clinically dead? helga, who exhibits no cortical functioning naomi, who is not breathing and whose heart is not beating j

Anna35 [415]

Answer: naomi, who is not breathing and whose heart is not beating

A person is considered clinically dead if their blood circulation and breathing is stopped because those two is needed to sustain live. Notice that the diagnosis need both of them, so only one of them is not enough. Helga and John has no problem in breathing and circulation, so they wont be considered clinically dead.

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3 years ago

How are segmented worms and round worms alike

jeka57 [31]

Both have same structure. Eat the same, move the same.

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3 years ago

Two insecticides will be compared for their effectiveness in eliminating aphids on tomato plants. Forty tomato plants of the Big

densk [106]

Answer:

The t-test

Explanation:

<em>The researcher should use a t-test to compare the two means and check if they are significantly different from each other.</em>

In using the t-test, both null (H0) and alternate (H1) hypothesis are made such that:

H0: n1 = n2
H1: n1≠ n2

Thereafter, the value of t is calculated and compared to its critical value on the table. The formula for calculating the t goes thus:

$t = \frac{Y_1 - Y_2}{\sqrt{\frac{S_1}{n_1} + \frac{S_2}{n_2} } }$

where, Y1 = mean of population 1, Y2 = mean of population 2, S1 = variance of population 1, S2 = variance of population 2, n1 = number of individuals in population 1 and s2 = number of individuals in population 2.

<em>At the end of the day, if the calculated t value is more than the critical value of t, the H0 is rejected and it shows that the two means are significantly different. Otherwise, the H0 is accepted and this shows that there is not significant difference between the mean of population 1 and that of 2.</em>

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3 years ago