Determine if the statement is true or false, and why. “The key to cell differentiation is that only some of the genes in a cell are expressed at any one time.” A. False, it should read “The key to Protein Synthesis is that only some of the genes in a cell are expressed at any one time.” B. False, it should read “The key to cell differentiation is that only one of the genes in a cell is ever expressed at any one time.” C. True D. False, it should read “The key to cell differentiation is that all of the genes in a cell are expressed at the same time.”

Answer:

Classical conditioning

Explanation:

Classical conditioning or Pavlovian conditioning is conducted on living organisms to make them associate one or more actions to a given (often familiar) stimulus or stimuli. Ivan Pavlov, in his experiment, trained a dog to associate an action, salivating for food, with the sound of a metronome.

Answer:

Classical conditioning

Explanation:

Ivan Pavlov researched classical conditioning and played a sound for dogs before feeding. The dogs became conditioned to receiving food after the bell. Once the dogs were trained, whenever they heard the bell, they began drooling in expectation of food.

Answer:

The monk seal and the octopus/eel/triggerfish also live in close proximity to each other and have an ecological relationship between them. The monk seals are the predators to octopus/eel/triggerfish in the ocean.

The monk seal preys on octopus/eel/triggerfish in the ocean for their survival and competes with sharks and other marine animals for food.

Hence, the monk seal and the octopus/eel/triggerfish have ecological relationship of the predation in which one animal feed on another.

The ecological relationship between the monk seal and the octopus/eel/triggerfish - predator and prey.

The monk seals are seals with no ear and are found in the tropic climate.

Thus, the ecological relationship between the monk seal and the octopus/eel/triggerfish - predator and prey.

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this is xylem and the answer is D. The tubes allow water and nutrients to be transported throughout the plant

Answer: The percent yield is, 42%

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of carbon disulphide}=\frac{1.55g}{76g/mol}=0.020moles[/tex]

[tex]\text{Moles of oxygen}=\frac{2.83g}{32g/mol}=0.088moles[/tex]

The balanced chemical reaction is:

[tex]CS_2+3O_2(g)\rightarrow CO_2+2SO_2[/tex]

According to stoichiometry :

1 moles of [tex]CS_2[/tex] require = 3 moles of [tex]O_2[/tex]

Thus 0.020 moles of [tex]CS_2[/tex] will require=[tex]\frac{3}{1}\times 0.020=0.060moles[/tex]  of [tex]O_2[/tex]

Thus [tex]CS_2[/tex] is the limiting reagent as it limits the formation of product and [tex]O_2[/tex] is the excess reagent.

As 1 mole of [tex]CS_2[/tex] give = 2 moles of [tex]SO_2[/tex]

Thus 0.020 moles of [tex]CS_2[/tex] give =[tex]\frac{2}{1}\times 0.020=0.040moles[/tex]  of [tex]SO_2[/tex]

Theoretical mass of [tex]SO_2=moles\times {\text {Molar mass}}=0.040moles\times 64g/mol=2.56g[/tex]

Actual mass of [tex]SO_2[/tex] = 1.1 g

Now we have to calculate the percent yield

[tex]\%\text{ yield}=\frac{\text{Actual yield }}{\text{Theoretical yield}}\times 100=\frac{1.1g}{2.56g}\times 100=42\%[/tex]

Therefore, the percent yield is, 42%

Answer:

The answer is

2. magnetism and fluorescence

Explanation:

The other properties mentioned are common properties that are used to identify all minerals. As you can see, hardness, color and fracture are common properties that cut across all minerals. Magnetism and fluorescence however, are not very common and are found in only a few special minerals. That is why they are considered special properties.

Hope this helps!

magnetism and fluorescence are considered two of the special properties that are used to identify certain minerals. Thus option B is correct.

Minerals are the chemical compound which has a well -defined composition and  a specific crystal structure and  occurs naturally in the pure form.

If a compound occurs naturally in different crystal form then it is  referred as a different mineral. The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.

Some minerals can have variable proportions of two or more chemical elements which occupy equivalent position in the crystal structure; it has  variable composition which is split into separate species.

minerals include color, streak, luster, specific gravity and cleavage as their physical properties, shows no magnetism. Basically magnetism is the physical property of the minerals, magnetism does not have these elements. thus, have no magnetism called diamagnetic. Examples of diamagnetic are quartz, apatite and calcite.

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Answer:

Explanation:

Please,i need a Brainliest.

Answer:

1 oxygen atom and 1 hydrogen atom are taken from the glucose molecule and 1 oxygen atom from the fructose molecule will make a water molecule. Everything else from the glucose and fructose molecules will make sucrose.

Answer:

Ionic bonds are formed when electron are transferred

Answer:

Stalactites

Explanation:

A stalactite is a type of formation that hangs from the ceiling of caves, hot springs, or manmade structures such as bridges and mines. Any material that is soluble, can be deposited as a colloid, or is in suspension, or is capable of being melted, may form a stalactite.

Answer:the answer is,

Stalactites

Explanation:

I just took the test

Answer:

the eating patterns of organisms thing

a term you can use could be Variety or a Variant

Answer:

genetic variation or variety

Explanation:

Answer:

A parasite only benefits when the host is alive.

Explanation:

Answer:

(C).      A parasite only benefits when the host is alive

Explanation:

your welcome slime

Answer:

Option A

Explanation:

Antimicrobial peptides cannot regulate body temperature. They can do all of the rest.

=> target intra cellular components.

=> insert themselves into target cell membranes.

=> disrupt plasma membrane and/or cell wall.

=> stimulate leukocytes.

Answer:

1a. 1:10

1b. 4.6×10¹³

2a. 15generations

2b. 327,680

Explanation:

10 fold serial dilution means 1ml of stock is mixed in 9ml distilled water. This is called as 10⁻¹ solution.

In this way, take 1ml each of every dilution and mix in 9ml distilled water to make 10⁻², 10⁻²-------10⁻⁸ dilutions.

Now, CFU/ml = no. of colonies × dilution factor/ volume of sample plated.

The lungs is the answer

Explanation

Earthworms do not have specialized respiratory organs like we do; instead, they take in oxygen and expel carbon dioxide directly through their skin. Oxygen diffuses through the earthworm's body surface and diffuses inward to the network of capillaries lying just under the body surface.

Answer:

I believe skin is the answer on edg.

Explanation:

Answer:

Explanation:

This group is made up bacteria that utilizes of citrate and are slow lactose-fermenting. They belong to the family Enterobacteriaceae which share some particular feature with the lactose-fermenting citrobacters.

Thus, they have now been included in the genus Citrobacter with no regards to how fast or slower their lactose fermentation is.

Answer:

A

Explanation

the red haired trait is dominant over the white haired trait. and the results are all red haired offspring. therefore its incomplete dominance

The correct option is D) Co-dominance because the offspring display alleles for both hair colors.

Co-dominance refers to a phenomena, in which both alleles are simultaneously expressed in the heterozygote.

Incomplete dominance is closely related to Co-dominance in which  phenotype of the progeny is intermediate of the parent phenotype.

Here, the red haired trait is dominant over the white haired trait and still both alleles are simultaneously expressed in the heterozygote of the offspring with red and white hair traits, thus, the Co-dominance best describes this inheritance pattern.

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hope it will help uh.....

Answer:

Match the chemical reaction with its correct type.

1. Nat + Cl → NaCl

decomposition reaction

2. CCIA C + 2Cl2

exchange reaction

3. HCl- + NaOH → NaCl + H2O

reversible reaction

4. ADP + P + E = ATP

synthesis reaction

Explanation:

Match the chemical reaction with its correct type.

1. Nat + Cl → NaCl

decomposition reaction

2. CCIA C + 2Cl2

exchange reaction

3. HCl- + NaOH → NaCl + H2O

reversible reaction

4. ADP + P + E = ATP

synthesis reaction

Answer:

Number 3

Explanation:

Dominant: 20, Recessive: 20

An allele is the alternative of a gene. On his case, these beans represent the alleles for a simple Mendelian trait, where red is dominant (R) and white is recessive (r).

As states earlier there are 20 red beans (20 dominant alleles) and 20 white beans (20 recessive beans) and each beach represent an allele.

Answer:

Catalysts increase the reaction rate of a chemical reaction, allowing it to use less energy to start a chemical reaction and doesn't change the chemical properties or formulas.

Explanation:

Answer:

Dogs do sweat. Sweating is a physiological response to heat where sweat glands secrete salty water. ... The problem is that most dogs are covered with a thick coat of fur, so sweat secreted where there is fur would get trapped in the fur, fail to evaporate, and therefore fail to cool the dog down much.

:

Explanation:

They do sweat. but that is absorbed by the fur of dog.

hope it helps

Answer:

The main cause of earthquake is the motion of tectonic plates which occurs due to friction.

Explanation:

The tectonic plates moves slowly inside the earth crust but the edges of these plates stuck with each other due to friction that occurs during their contact. When these two plates detached from each other, the force of friction converts in a form of wave energy which can be observed in the form of earthquake. Divergent, convergent, and transform are the three types of plate boundaries which are responsible for earthquake.

Answer:

D) The plates smash together with no subduction

Explanation:

Got it right

Answer:

May be trachea

Explanation:

Answer:

Amino acids

Explanation:

Hope it helps.

Answer:

Yes, your answer, nitrogen, is correct (the most appropriate option). However, oxygen is also a correct option.

Explanation:

Nitrogen exists on its own as a diatomic gas. However, it exists as organic nitrogen in nucleic acids such as DNA and RNA (as part of their nitrogenous bases) and in the amino (--[tex]NH_{2}[/tex]) group of amino acids.

Do note that a case can also be made for oxygen as a right option: like nitrogen, it exists as a diatomic gas and can be found in both nucleic acids and in the carboxylic group of amino acids.

Sulfur is not an appropriate option as nitrogenous bases (and nucleic acids) to the best of my knowledge do not contain sulphur although some amino acids like cysteine do.

Carbon is not also an appropriate option because elemental carbon does not exist in gaseous form even though it can be found in both nucleic acids and amino acids.

Oxidative phosphorylation relies on the hydrogen ion concentration gradient generated and maintained by the electron transport chain.

Hydrogen ions are actively transported out of the mitochondrial matrix.

Hydrogen ion concentration is higher in the intermembrane space than in the mitochondrial matrix.

Answer:

Connects Bones to other Bones.

Explanation:

A ligament is a tissue that connects two bones together to form a joint.

Answer:

connect bones to other bones

Explanation:

Ligaments connect bones to other bones. Tendons connect bones to muscles.

Answer:

The haemoglobin levels or counts can be used.

Explanation:

The oxygen carrying pigment of the blood is the heamoglobin (Hb).it is a protein molecule with for heam groups,Each of the latter can bind with  4 molecules of oxygen in a cooperate bonding.The more oxygen molecules binding by Hb,the more oxygen is carry in RBC.

Therefore if the number of Hb counts is reduced in an individual the volume of oxygen in the RBC of the subject should  reduced,Therefore, this should be a good indicator of the lower oxygen capacity of the blood of the individual.

Basically in a physiological female the Hb count/100ml of blood is 12-16g/ml,like wise 13-18g/100mI in a physiological  man.

Therefore fluctuations in the levels of these values below the set points  is an indicator of distortion in the oxygen carrying capacity of the blood.

The  amount of the blood in volume that contains RBC is called Hematocrit. Therefore for accuracy the HCT together with the Hb counts are good indicators of oxygen capacity of the blood.

Hematocrit refers to the volume percentage of the red blood cells in the blood. Oxygen-carrying capacity can be measured by several techniques.

The co-oximetry and Arterial Blood Gas can be used to determine the oxygen-carrying capacity.

The techniques can be explained as:

Thus, the co-oximetry and ABG test can be used to determine oxygen levels in the blood.

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The answer to your question is a trophic level of carnivores

Only a fraction of the energy available at one trophic level is transferred to the next trophic level.

Since carnivores are above herbivores in the trophic levels, herbivores have more energy than carnivores.

Hope this helps and have a great day!

Answer:

a reactant that is catalyzed by an enzyme

Explanation:

Reactants are often referrred to as substrates as those are what enzymes mostly act upon to create products or some desired consequence

Option (d). a reactant that is catalyzed by an enzyme is called the substrate.

A substrate exists as a molecule on which an enzyme acts. Enzymes catalyze chemical reactions that concern substrate, where the substrate binds to the enzyme's active site, and an enzyme-substrate complex is created. By action of the enzyme, the substrate exists transformed into a product, released from the active site, and free to obtain another substrate.

Enzyme catalysis exists as the increase in the rate of a process by a biological molecule, an "enzyme". Most enzymes exist in proteins, and most such processes are chemical reactions. Within the enzyme, naturally, catalysis happens at a localized site, called the active site.

The reactant in an enzyme-catalyzed reaction is named a substrate.

Because enzymes can expand reaction rates by enormous factors (up to 1017 times the uncatalyzed rate) and tend to be very precise, typically producing only a single product in quantitative yield, they exist the focus of active research.

Hence, Option (d). a reactant that is catalyzed by an enzyme is called the substrate.

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Answer:

A

Simply the noise from heavy traffic will cause the destructive interference which reduces the echolocation,blocking the echoes  and therefore prevent prey location for bats.

Generally this reduces the Bats' population, as some could not rely on the echo to locate the prey, leading to starving  and death. Thus each bat needs to rely on the individual echolocation from the prey to survive as new hunting adaptation.Since the echolocations has been blocked

Answer:

Bats would be unable to use echolocation, which would prevent them from finding any prey.

Explanation: