1. What are the independent and dependent variables in each of the experiments?

2. What information should be added to the diagram to give the reader a better understanding of how these experiments
were conducted?

3. What items should have been CONTROLLED in the experiments?

4. How much confidence would you have in the conclusion of experiment 3 if you found out that the temperature was not
controlled? Explain your reasoning.

5. Create your own flow chart to answer a causal question.

Answer: Contractility

Explanation:

The ability of muscle to shorten forcibly when adequately stimulated is known as contractility, and sets muscle apart from other tissue types.

Answer:

analyzing behaviors of living animals with a common ancestry

analyzing embryos and skeletons of animals of the same species

analyzing DNA sequences and embryonic development

analyzing the the fossilized remains of animals from different time periods

The blood vessel that is found in the anterior-medial thigh is the femoral artery.

The femoral artery is a  major blood vessel that transports blood from the abdomen to the lower limbs.

The femoral artery is fundamental because it transports high volumes of oxygen-rich blood.

In conclusion, the blood vessel that is found in the anterior-medial thigh is the femoral artery.

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Answer:

Digestive tract & Accessory glands together constitute the digestive system.

Explanation:

The accessory organs are the teeth, tongue, and glandular organs such as salivary glands, liver, gallbladder, and pancreas.

Answer: A

Explanation: TOOK THE TEST OK

The explanation of how the heart wall thicknesses are related to the functions of the chambers are as explained below.

Heart chambers are four hollow spaces within the human heart which are made up of two atria and two ventricles.

The thickness of the heart wall is related to the force of contraction required  in the heart in the sense that the left ventricle which is the thickest wall contracts with the greatest force and creates the greatest amount of blood pressure in the heart chambers.

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In the overall process of glycolysis and cellular respiration, glucose is oxidized and oxygen is reduced.

This whole process of oxidation and reduction is called aerobic respiration.

In this process glucose reacts with molecular oxygen to produce carbon dioxide and water, hence the carbon atoms in glucose are oxidized.

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The personnel must receive training to perform animal procedures before any procedures are performed on the animal.

The animals used for research and experiments should be taken care of in. such a way that they can be replaced, reduced and refined.

According to the animal guide policy, any scientist that would use an animal for a research work would have to undergo a training before performing any procedures on the animal.

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The sensing component of the feedback system that senses the changes in the environment and generates nerve impulse is known as a receptor.

Nerve receptors can be defined as biological structures capable of converting external/internal stimuli to electrical impulses.

Nerve receptors include different types of cellular structures located in eyes, skin, mouth, nose, etc.

In conclusion, the sensing component of the feedback system that senses the changes in the environment and generates nerve impulse is known as a receptor.

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Answer:

C

Explanation:

Everything around us is all about science...We practice them everyday...All thanks to the scientists after so much examines,they let us know more about many things we don't know much about,they worked on them and improve them so that we can live a convenient life.

This measurement, 6.410102 , is from scientific notation to standard notation.  The answer will be 6.41

Scientific notation is a way of writing numbers in two parts:

Only the figures (with the decimal point after the first digit), followed by × 10 to the power that moves the decimal point where you should be (that is, showing how many positions the decimal point moves).

On the other hand, the standard notation is the one that is normally used for not-so-large numbers by putting one digit behind another.

Thus, The answer will be 6.41.

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There argument would be that It is a necessity because a long period of adaptation is needed for acquiring physical and cognitive competencies.

Evolutionary theorists are those scientist in the field of psychology that studied the long term discoveries about the development of human beings from generation to generation.

They where able to discover that human beings have a long term period of development requiring nurturance and protection for many years.

This was so because such a long period of time is needed for them to acquire both physical and cognitive competencies.

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The lettered items are matched with the correct numbered items as follows:

a. -SSRNA: host ribosomes cannot translate it. Thus, it need to be copied to + strand to make viral proteins.

b. +SSRNA: it can be translated directly to make viral proteins.

c. Provirus: the integrated viral genome in an animal host.

d. RNA dependent RNA polymerase: an enzyme needed to copy RNA to RNA.

e. Retrovirus: it synthesizes complementary ssDNA once inside the cell.

A genome can be defined as the complete set of hereditary instructions which is typically found in the deoxyribonucleic acid (DNA) such as:

In conclusion, the lettered items should be matched with the correct numbered items as follows:

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Complete Question:

Match the items. The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives.

a. Host ribosomes cannot translate it. Need to copied to strand to make viral proteins

b. Translated directly to make viral proteins

c. Integrated viral genome in an animal host

d. Enzyme needed to copy RNA to RNA

e. Synthesizes complementary ssDNA once inside the cell.

1. +SSRNA

2. -SSRNA

3. Retrovirus

4. RNA dependent RNA polymerase

5. Provirus

Answer:

[tex]\textsf {Option 2}[/tex]

Explanation:

Hot springs and geysers are formed by the heating of groundwater. This is evidenced by the bursting of these natural phenomena, releasing heat.

Answer:

C. Must be able to reproduce

Explanation:

A. All living things must grow and develop

B. Single-celled organisms exist and are considered living things.

D. All living things must have DNA in their cells.

Underneath the right side of the liver, the gallbladder is a pear-shaped organ.

Its primary function is to gather and concentrate bile, a digestive fluid made by the liver. The gallbladder is where bile is kept after the liver produces it. The gallbladder receives a signal from the stomach when you eat. Bile is released from the gallbladder when it contracts, and it travels through the gut via the major common duct. Bile combines with the food there and aids in digestion.

When the gallbladder is removed from a healthy person, there are rarely any obvious health or digestive issues, though there is a slight chance of diarrhea and fat malabsorption.

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Answer:

Yes

Explanation:

There are plenty of evidences and uses of sieving

It was begun by Romans

Nowadays it's used to separate several mixtures like sands for construction,food materials etc

the repolarization of the cell.

Mechanism :

Action potentials are signals that are sent and received by muscle and nerve cells. Because of the negative concentration gradient in the resting membrane potential of nerve cells, there are more positively charged ions outside the cell than inside. There are more sodium ions outside the cell and more potassium ions within because these positively charged ions are sodium ions. Action potentials cause the membrane to depolarize, which is followed by the process of repolarizing the cell. The membrane potential changes and reverts to the negative value of the resting potential during repolarization. The potassium channels open and the sodium channels close at this stage, allowing the nerve cell to lose positively charged ions.  

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Graph 3 shows a species that produces high numbers of offspring with paternal care.

The survivorship curve gives us a idea of the  number of individuals in the population that are expected to survive and reproduce at any given time. We have to note that paternal care increases the chances of survival of the organism.

Hence, graph 3 shows a species that produces high numbers of offspring with paternal care.

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Answer:

females have 2X chromosomes but males have one 1Y and 1X chromosome therefore if the male donates the x chromosome the baby will be a girl

Answer:

A biological catalyst

Explanation:

An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.

The classification categories of organisms are:

Taxonomy can be defined as a scientific method which is used by researchers for the naming, classification and description of the various species of organisms such as humans, animals, and plants.

In Science, the classification categories of organisms include the following:

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Answer:

Osteocytes

Explanation:

i studied this

Cellular membrane are permeable to nutrients but impermeable to protein.

Cell membrane is the cellular structure that surrounds the cell which is semi permeable thereby selecting the substances that either leaves or enters the cell.

Nutrients are chemical that helps to sustain the cell while proteins are used to build up worn out part of the cell.

Therefore, the cell membrane allows the cell to absorb nutrients by resists the removal of proteins.

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Answer:

D

really dude, just read these types of questions the one that's really different is usually right

Bacteriostatic antibiotics inhibit the replication of microorganisms and prevent the growth of the organism without destroying them.

An antibiotic refer to chemical substances that hello to destroy, kill or inhibit the growth of microorganisms in the body to prevent infections.

Therefore, Bacteriostatic antibiotics inhibit the replication of microorganisms and prevent the growth of the organism without destroying them.

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The correct description of the given molecule is C. Fatty Acid.

A typical fatty acid has a straight chain of carbon atoms. These atoms are then bonded with hydrogen atoms.

At the end of this line, there will be a -COOH bond and at the beginning, there is an H bond. This is what is depicted in the diagram so it must be a fatty acid molecule.

Options for this question include:

A. ribose

B. glucose

C. fatty acid

D. sucrose

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Answer:

Because they all don't code for specific amino acids

Explanation:

Some of them don't code for Amino acids, instead, they code for directions. There are also amino acids that can be coded with multiple codons. this is why there are more codons than amino acids

If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.

The formula for calculating work is Work = Force x Distance so for calculating work we have to multiply 2 meters with 5 newtons force then we get 10 newton meters.

So we can conclude that If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.

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From the calculations, the work done on the book is 10 J.

In science, work is said to be done when the force applied moves a distance in the direction of the force.

Given that;

Force applied = 5 N

Distance covered = 2 m

It the follows that the work done is;

W = F * d

W = 5 N * 2m = 10 J

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