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3 years ago

What are polar molecules

Biology

1 answer:

BigorU [14]3 years ago

7 0

Answer:

Polar molecules are molecules that are differently charged than those they are bonded with. The distribution of electrons in these molecules are not even.

Explanation:

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Many of the organisms in the ocean are nutrient-limited. if you wanted to investigate this phenomenon, one reasonable approach w

Mamont248 [21]

None of the provided options are reasonable. comparing nutrient concentrations between the photic zone and the benthic zone can not tell you whether differences in concentrations between the photic and benthic zone are due to uptake by phytoplankton or because nutrients are sinking to the sea bottom and ocean stratification is preventing mixing. The approach of contrasting nutrient uptake by autotrophs at different locations under different temperatures would not provide useful information on limiting nutrients. but rather uptake rates at different temperatures. It is likely that experimentally enriching some areas of the ocean and compare their productivity to that of untreated areas can provide an indication of limiting nutrients, but this is not advisable, as it would have to be done on a large scale, and one cannot be sure of the ecological consequences. Also, because it would not be a controlled experiment, other factors could create 'noise' in the data. The last option, observe antarctic ocean productivity from year to year to see if it changes, also does not help, as there is no correlation between nutrient concentrations using this approach. The best approaches would be either the last approach, but with the additional monitoring of nutrient concentrations, or under a controlled laboratory experiment.

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2 years ago

A large population of laboratory rats was allowed to breed randomly for a number of generations. In this population, a dominant

ivann1987 [24]

Answer:

Frequency of heterozygous animals with agouti fur is $42$ %

Explanation:

As per the Hardy Weinberg's equation -

$q^2$ represents the frequency of population with phenotype expressed by homozygous recessive genotype

$p^ 2$ represents the frequency of population with phenotype expressed by homozygous dominant genotype

and $2pq$ represents the frequency of population with phenotype expressed by homozygous recessive genotype

Given -

$q^2 = 0.49\\q = 0.7$

As per first principle of Hardy Weinberg's equilibrium

$p + q = 1$

Substituting the value of q in above equation, we get -

$p = 1- 0.7 \\p = 0.3$

As per second principle of Hardy Weinberg's equilibrium

$p^2 + q^2 + 2pq = 1\\$

Substituting the given values in above equation, we get -

$0.09 + 0.49 + 2pq = 1\\2pq = 1 - 0.58 \\2pq = 0.42$

Frequency of heterozygous animals with agouti fur is $42$ %

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2 years ago

feel the inside of your elbow as you lift a book. you should feel a strong cord. what is this? what does it do?

Crank

The strong cord you feel in your elbow is called your Oblique cord.

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3 years ago

Which one of the following statements is accurate?

kvasek [131]

A)False colors are added to images to make some structures more noticeable.

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3 years ago

How many moles of HCI are neede to prepare 150 mL of a 1.2 M solution?

nexus9112 [7]

<h3>Answer:</h3>

0.18 moles HCl

<h3>General Formulas and Concepts:</h3>

Math

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Chemistry

Unit 0

Conversion: 1000 mL = 1 L

Aqueous Solutions

Molarity = moles of solute / liters of solution

<h3>Explanation:</h3>

Step 1: Define

150 mL

1.2 M

x moles

Step 2: Identify Conversions

mL to L conversion

Step 3: Convert

$\displaystyle 150 \ mL(\frac{1 \ L}{1000 \ mL} )$ = 0.15 L

Step 4: Solve for Moles

Substitute [Molarity]: $\displaystyle 1.2 \ M = \frac{x \ moles \ HCl}{0.15 \ L}$
Isolate x: $\displaystyle 0.18 \ moles \ HCl = x$
Rewrite: $\displaystyle x = 0.18 \ moles \ HCl$

Step 5: Check

We are given 2 sig figs. Follow sig fig rules and round.

Since our final answer is in 2 sig figs, there is no need to round.

3 0

3 years ago

Read 2 more answers