BIOLOGY MIDDLE SCHOOL

Ecosphere in a sentence

Answers

Answer 1
Answer: Lack of concern for the cost to Ecosphere. 


Answer 2
Answer: Tools cannot understand or recognize the delicate organic balances needed for its host to thrive within the ecosphere of this planet.

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COLLEGE

Those factors that are kept the same in the experimental group and the control group are called: A. manipulated variables
B. experimental variables
C. observed variables
D. control variables

Answers

D, control variables.
HIGH SCHOOL

if a solution contains 0.5 grams of nacl and 100 grams of water, nacl is the solute and water is the solvent. true or false?

Answers

Answer:

The right answer to this question is: True

Explanation:

Water is a substance known for the whole world as the universal solvent, and that can mean lots of different things, but the main one is that water, as a solvent, will dissolve most of the other substances when they're poured with it. Besides that, the solvent will almost always be in a higher quantity that the solute, in this case, there are only 0,5g of NaCl and 100g of H2O, so by that, we can be sure that the water is the solvent, and the NaCl is the solute.

True. because a solute is a substance that is dissolved in another substance and nacl is the solution here.
HIGH SCHOOL

Transcription and translation of a gene composed of 30 nucleotides would form a protein containing no more than ___ amino acids.

Answers

will not form a protein of not more than 10 amino acids. during transcription the DNA carrying a certain information is converted to m-RNA which will then be converted to protein in a process referred to as translation. the reason why a gene with 30 nucleotide bases will not form a protein with more than 10 amino acids is every three nucleotide base code for one amino acid. so when you divide 30 by 3 the answer is 10. 
COLLEGE

Assume that the heart is beating at 70 beats per minute. what is the approximate length of the cardiac cycle? assume that the heart is beating at 70 beats per minute. what is the approximate length of the cardiac cycle? 0.75 sec 0.86 sec 0.92 sec 0.80 sec

Answers

In order to get the period which is between the heart beats, sixty seconds or one minute should be divided by the number of beats per minute. If heartbeats at seventy times per minute then we divide sixty seconds by seventy.
60/70= 0.86 seconds.
MIDDLE SCHOOL

The diversity of organisms present on earth is the result of

Answers

The diversity of organisms present on earth is the result of natural selection. members of species differs from one another in their phenotype. this variation in phenotype allows the occurrence of natural selection . Thus, natural selection works on genetic variations within a population, selecting the traits which are most adapted to the habitat.

COLLEGE

Could rna have been the original site of information storage in the primitive cell? a difficult problem with this possibility is that

Answers

Out of the following given choices;

a. RNA is not able to carry information.

 

b. RNA is more complex in structure than DNA.

 

c. RNA would get stuck on the inner surface of the nuclear membrane.

 

d. primitive cells would not let RNA molecules across their membranes.

 

e. no conditions exist that favor production of both the sugar and base parts of an RNA monomer


The answer is E. According to evolution, the best adaptable trait in an environment is highly preserved. The chemical properties of RNA make large RNA molecules inherently fragile, and they can easily be broken down into their constituent. Therefore it is unconvincing that was it was used to store critical genetic information.  






HIGH SCHOOL

Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7. Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7.

Answers

Answer:

The correct answer will be-

1. Positive

2. Negative

Explanation:

Amino acids are the building blocks of the protein molecule which is formed by the binding the amino acids in the chain via a peptide bond.

The amino acid is attached to four different groups on its four sides which includes the amino group, R group, carboxyl group and Hydrogen.

These attached groups to the amino acids determine the nature of the amino acid that is whether it will behave as an acidic molecule or basic molecule at physiological pH.

At pH 7, the attached amino group gets protonated and bears a positive charge making it a basic amino acid while the attached carboxyl group gets deprotonated making it negatively charged and thus acidic.

Thus, Positive and Negative is the correct answer.

MIDDLE SCHOOL

There are five elements of a universal systems model: goal, inputs, processes, outputs, and feedback. Which of the following describes the "processes" portion of this model? (A)what is done to the inputs, (B) the results of the system (C) the money, time, and resources used on the model (D) information collected from the outputs

Answers

Answer:

Option A. What is done to the inputs.

Explanation:

Processes means " To treat something", or "To deal with information". so here we process the inputs to get a result.

(A)what is done to the inputs
HIGH SCHOOL

Why is cell membrane differentially permeable?

Answers

These molecules are non-polar, so they don't encounter any resistance from the hydrophobic core of the bilayer. Gases also pass freely through the membrane, since they are uncharged. This is good for us because if the passage of oxygen and CO2 into and out of cells wasn't free, that could quickly become
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