Andrew G.

Mr. Hammond has a small garden. He planted tomatoes, zucchini, onion, garlic and beans (legumes). When summer is over and he harvested his crops, why did Mr. Hammond pull out all of the plants... more

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Biology

03/01/18

report the manner in which the inhibitors interact with their enzyme target, if they are allosteric or competitive

All cells require energy to live. In your assigned reading for this week, you learned how cells generate and then utilize that energy through the metabolic process.As our understanding of these... more

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Biology Biology Tutor Biology A

02/24/18

do hepatocytes form bile...

Does hepatocytes form bile and then secrete it into sinusoids which carry blood to the central venule in the lobule?

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Biology

02/16/18

Cystic fibrosis is an autosomal recessive disorder that affects the secretory glands

Cystic fibrosis is an autosomal recessive disorder that affects the secretory glands, leading to recurrent, severe respiratory infections and gastrointestinal disorders. According to the diagram... more

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Biology

01/28/18

Suppose you have 50 students in a class, 25 students were able to taste PTC and 25 students did not taste for PTC. What is the allele frequency of p?

I need to figure out the answer but I dont know how.

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Math Biology Basic Math

01/28/18

What can cause differences in weight when using a digital balance?

I have this practice question but I don’t understand it, so two students were asked to find the weight of a penny on a digital balance. The first student (mike) found the weight was 0.001 grams and... more

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Biology

01/27/18

Scientific explanations are accepted when...

they are consistent with experimental evidence. they seem plausible. they are consistent with observational evidence. they lead to accurate predictions. more than one answer can be chosen

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Biology Darwin's Theory Of Evolution Connecting The Concepts

01/20/18

Connecting the concepts:Evolution

I need help putting these concepts together diversity ancestral species heritable variations in a population living species natural selection evolutionary adaptations greater... more

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Algebra 1

10/06/16

A word problem i just can't understand. HELP!

A model of a? tractor-trailer is shaped like a rectangular prism and has a width of 33 ?in., a length of 99 ?in., and a height of 44 in.. The scale of the model is 1 font size decreased by 10 :... more

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Chemistry, College

10/29/15

8) A 25.00 g sample of aqueous hydrogen peroxide solution (H2O2)

8) A 25.00 g sample of aqueous hydrogen peroxide solution (H2O2) decomposes over time producing 0.890L of O2 gas at 25.2 oC and 918 torr. What was the mass% of the original H2O2 solution? The... more

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Chemistry

10/22/15

Given the following data:

N2(g)2NO(g)++O2(g)O2(g)2N2O(g)→→→2NO(g),2NO2(g),2N2(g)+O2(g),ΔH=+180.7kJΔH=−113.1kJΔH=−163.2kJ use Hess's law to calculate ΔH for the following reaction:N2O(g)+NO2(g)→3NO(g)Express the enthalpy in... more

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Chemistry

10/20/15

How much energy would be absorbed if 23.1 g of NH4Cl reacts?

The energy diagram shown represents the chemical reaction between solid ammonium chloride and solid barium hydroxide octahydrate:2NH4Cl(s)+Ba(OH)2⋅8H2O(s)→2NH3(aq)+BaCl2(aq)+10H2O(l)The ΔH for this... more

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Chemistry

10/12/15

What mass of citric acid, C(OH)(COOH)(CH2COOH)2, (which contains three acidic protons) is required to neutralize the spill? 1 gallon = 3.785 L.

What mass of citric acid, C(OH)(COOH)(CH2COOH)2 , (which contains three acidic protons) is required to neutralize the spill? 1 gallon = 3.785 L .Express your answer to two significant figures and... more

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Chemistry

09/16/15

What is the significance of the fact that the droplets carried different charges?

Millikan determined the charge on the electron by studying the static charges on oil drops falling in an electric field. A student carried out this experiment using several oil drops for her... more

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Chemistry

07/21/15