Please be able to answer this question in the next hour or do not do it.

Which of the following statements is true?

 

A valid scientific hypothesis is self-evident and does not need to be tested by experimentation.

 

If properly designed, experiments always prove hypotheses to be wrong.

 

 

Once a hypothesis has been proposed, it can never be challenged.

 

The scientific method or process can help people make informed medical and environmental decisions.

 

Question 24 pts

The first two steps of the scientific process typically include making ________ and forming a ________.

 

 

Question 34 pts

A species of butterflies gradually becomes darker in color over many generations; this is an example of which characteristic of living organisms?

 

They obtain energy from the environment to support metabolism.

 

They reproduce using DNA.

 

 

They can evolve as groups.

 

They sense the environment and respond to it.

 

Question 44 pts

You are coughing and producing a wheezing sound as you breathe; you also have a fever. You go to the doctor who listens to your chest, takes X-rays of your chest, and determines that you probably have something called croup. Which of the following are the facts in this scenario?

 

You probably have whooping cough.

 

You probably need antibiotics.

 

 

You probably have croup.

 

You are coughing, wheezing, and have a fever.

 

Question 54 pts

A scientific hypothesis must be ________; if not, science cannot evaluate it.

 

testable

 

accepted

 

 

provable

 

rejected

 

Question 64 pts

A tissue is defined as

 

the basic unit of life.

 

a network of organs which perform a wide range of functions.

 

 

two or more atoms held together by strong chemical bonds.

 

a group of cells that performs a unique set of tasks in the body.

 

Question 74 pts

Is it possible for scientists to study events that happened or animals/plants that lived millions of years ago?

 

No. The laws of physics that exist today are not the same laws of physics that existed in the past, so there is no way to compare plant or animal fossils to those of modern organisms and deduce the function of fossilized structures.

 

No. There is no way to analyze plant or animal fossils that lived millions of years ago because the laws of nature that exist today have changed dramatically from the past.

 

 

Yes. Genetic manipulation of fossils allows scientists to directly test metabolic and behavioral characteristics of plants and animals from the past.

 

Yes. Apply the laws of physics and nature that we know exist today to evaluate the evidence of past events. For example, observe modern animal behavior, structure, and function, and compare them to the structures of fossilized animals to deduce the function of the fossilized structures.

 

Question 84 pts

A direct and repeatable observation of any aspect of the natural world can be considered a scientific ________.

 

 

Question 94 pts

Organize the following concepts in order of most exclusive to most inclusive and give a brief explanation of the concepts: biome, biosphere, community, ecosystem, organism, and population.

 

 

Question 104 pts

Scientists are human beings and are, like all human beings, susceptible to personal and group biases that may influence how they interpret evidence. Before original research work is accepted and added to a growing body of scientific understanding, perhaps even contributing to our understanding of an important scientific theory, it must be scrutinized by experts in the field who have no direct connection to the research under review. The main mechanism for doing this is

 

peer-reviewed publications.

 

Wikipedia.

 

 

popular magazines.

 

the Discovery Channel.

 

Question 114 pts

A disaccharide consists of two

 

sugars.

 

hydrocarbons.

 

 

amino acids.

 

fatty acids.

 

Question 124 pts

Based on the water molecule pictured below, which of the labeled areas possesses a partial negative charge?

 

 

A and C

 

C only

 

 

A only

 

B only

 

Question 134 pts

Carbon, hydrogen, and nitrogen are all examples of

 

compounds.

 

macromolecules.

 

 

amino acids.

 

elements.

 

Question 144 pts

Carbon atoms are bound to each other by

 

hydrogen bonds.

 

covalent bonds.

 

 

ionic bonds.

 

polar bonds.

 

Question 154 pts

When calcium (Ca++) and chloride (Cl^-) interact with one another they bond using ________ bonds.

 

ionic

 

peptide

 

 

hydrogen

 

covalent

 

Question 164 pts

Which of the following explains why ice floats on water?

 

The cool temperature of ice reduces the extent of molecular motion relative to liquid water.

 

The crystal structure of ice is more regular than that seen in liquid water.

 

 

When ice forms, the hydrogen bond in the water molecule becomes nonpolar; ice behaves like oil.

 

The distance between water molecules in ice is greater than in liquid water.

 

Question 174 pts

The class of macromolecules that do NOT form true polymers are the ________.

 

 

Question 184 pts

After adding a small amount of Solution A to Solution B, the pH of Solution B declines from 8 to 3. Solution A must contain

 

water only.

 

a base.

 

 

a salt.

 

an acid.

 

Question 194 pts

Which of the following is the largest in size?

 

carbon atom

 

nucleotide

 

 

protein

 

glucose

 

Question 204 pts

Which of the following statements is true of proteins, carbohydrates, and nucleic acids?

 

Each of these molecules is built from a common set of monomers.

 

All three are used to store genetic information.

 

 

None of these macromolecules mixes well with water.

 

All of these molecules are primarily used as energy-storage molecules.

 

Question 214 pts

Many important cellular functions in eukaryotic cells occur within membrane-enclosed organelles, such as cellular respiration occurring within the mitochondria. The membranes of the mitochondria provide a place for enzymes needed for cellular respiration to anchor and function. Prokaryotic cells must also carry out respiration but do not have mitochondria. Where is the most likely place that enzymes needed for cellular respiration are anchored and functioning?

 

the cytosol

 

the chromosome

 

 

the cell wall

 

the plasma membrane

 

Question 224 pts

The smallest and most basic units of life are microscopic, self-contained units enclosed by a water repelling membrane and are called ________.

 

 

Question 234 pts

An animal cell that contains an extensive network of ________ is likely to be an important source of lipids and/or hormones important in the development and functioning of that animal.

 

 

Question 244 pts

Some antibiotics used to treat bacterial infections kill the bacteria by chemically punching holes in the cell wall of the bacteria, by preventing the bacteria from replicating their DNA, or by many other actions that ultimately cause cell death. Why do these antibiotics not work to kill viruses and cure people of viral infections?

 

Viruses mutate at a rate faster than the rate at which antibiotics can work to kill them.

 

Viruses are just too virulent to be killed by those antibiotics.

 

 

Antibiotics cannot kill a virus because viruses are not living cells with cell walls to puncture, nor do they have their own organelles to replicate DNA.

 

Viruses are too quick for the antibiotics to work.

 

Question 254 pts

Match the following cellular structures with their primary function (you may need to use a function more than once).

central vacuole 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

nucleus 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

cytoskeleton 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

mitochondrion 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

ribosomes 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

rough endoplasmic reticulum 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

smooth endoplasmic reticulum 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

Golgi apparatus 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

lysosome 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

plasma membrane 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

cell wall 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

chloroplast 

                                                                                                         

[ Choose ]

location of DNA

tags proteins for movement

protein synthesis

cellular respiration

lipid synthesis

structure and support for cell

water and solute storage

internal organization and structural support

regulate what moves in and out of cell

enzymatic breakdown of large molecules

photosynthesis

 

Question 264 pts

Which of the following help increase the selective permeability of a phospholipid bilayer membrane?

 

transport proteins

 

Transport proteins, channel proteins, and passive carrier proteins all help increase the selective permeability of a phospholipid bilayer membrane.

 

 

channel proteins

 

passive carrier proteins

 

Question 274 pts

This figure depicts a transport protein in a plasma membrane. The dark blue molecules represent a protein that is being transported out of the cell. Is the transport of the protein active or passive? Support your answer by describing evidence visible in the figure and stating its significance regarding your answer.

 

 

 

 

Question 284 pts

Which of the following types of organisms are commonly single-celled (unicellular)?

 

many fungi, some protozoans, and plants

 

plants and animals

 

 

bacteria, some fungi (yeast), and many protozoans

 

many fungi, plants, and animals

 

Question 294 pts

If a bottle of perfume were spilled in the corner of a large lecture hall, the students sitting near that corner of the room would very quickly smell the perfume. Over time, the students sitting in the far corner of the room would smell the perfume. What phenomenon has occurred to the perfume molecules that have entered the air?

 

facilitated diffusion

 

active transport

 

 

osmosis

 

simple diffusion

 

Question 304 pts

The endoplasmic reticulum (ER) is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell. Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

 

It might be beneficial for the ER and nuclear envelope to be connected because it would make it easier for the ER to carry out photosynthesis.

 

It might be beneficial for the ER and nuclear envelope to be connected because it would make it easier for the nucleus to actually carry out cellular respiration.

 

 

It might be beneficial because it takes less energy, DNA, carbohydrates, and phosophlipids for the ER to synthesize centrioles.

 

It might be beneficial for the ER and nuclear envelope to be connected because it might make it easier for messages to get from the nucleus to the ER where proteins and lipids are made for the cell; this would most likely require the use of less energy.

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Status NEW Posted 03 Jul 2017 03:07 AM My Price 20.00

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