Answer:
All the options are true except option D.
Explanation:
Archaea are a group of prokaryotic organisms i.e. they lack a membrane bound nucleus. They are one of the the three domains of life (the other two being bacteria and eukarya). Archeans possess a cell wall like bacteria but it is not composed of peptidoglycan, like bacteria cell wall.
Archeans are generally known to be found in very severe environmental conditions, hence, they are referred to as extremophiles e.g Some are thermoacidophiles i.e. thrive in very hot and acidic environment while others are extreme halophiles i.e. thrive in salty regions. Archeans known as methanogens produce methane gas as a product of metabolism from carbon dioxide and hydrogen.
However, the domain archeae was only found to be in existence recently after the domain bacteria, hence, they are not considered to evolve before the domain bacteria.
A population of salamanders lives near a stream. A severe drought dries up the flow of the stream. What is this effect on the salamander population called? Group of answer choices: emigration limiting factor immigration biotic factor
Answer:
limiting factor
Explanation:
In an ecosystem, certain factors hinder the growth or abundance of the population of organisms. These factors are called LIMITING FACTORS. Limiting factors, which can be biotic, food, drought, predation, disease etc, are factors that inhibits a population of organism from becoming enlarged. There are two types of limiting factors viz: density dependent (depends on size) and density independent (not dependent on size).
This is the case of a drought that dries up the stream that inhabits a population of salamanders. The drought causes the unavailability of water, which will ultimately have an effect on the growth of the salamander population. Hence, the DROUGHT is considered a LIMITING FACTOR.
What happens during telophase II of meiosis?
Answer:
A nuclear envelope forms around each set of chromosomes and cytokinesis occurs, producing four daughter cells, each with a haploid set of chromosomes.
Explanation:
Answer:
A total of four daughter cells form.
Explanation:
Why do increased temperatures decrease photosystem II activity?
Answer: Options are not given, here are the options.
a.Thylakoid membranes become more permeable to ions
b.The chlorophyll breaks down
c.The peripheral proteins lose their ability to bind to the transmembrane proteins
d.Water cannot bind to PSII to form oxygen
The correct option is C.
The peripheral proteins lose their ability to bind to the transmembrane proteins.
Explanation:
In photosystem 11, it is the center where light is converted to moving electrons. When the chlorophyll molecule absorb light, the electrons gain energy.
Increase temperature affects the activity of photosystem 11 because the peripheral protein lose their ability to bind to the transmembrane protein which is as a result of high temperature affecting the surface of ionic interactions which is for binding to transmembrane protein.
The sporophyte stage begins with the information of
Which is a component of cell theory? Cells come from bacteria. Cells come from cells. Cells come from nonliving matter. Cells come from non-cells.
Answer:
B
Explanation:
Cells come from cells is correct component of cell theory.
What is Cell theory?Theodor Schwann put forth the classical cell theory in 1839. This theory consists of three components.
All organisms are composed of cells, according to the first section. The basic building blocks of life are cells, according to the second section. The conclusions reached by Schwann and Matthias Schleiden in 1838 as a result of contrasting their observations of plant and animal cells served as the foundation for these sections.
Rudolf Virchow described the third element, which claims that cells originate from preexisting cells that have multiplied, in 1858 when he said omnis cellula e cellula (all cells come from cells).
Therefore, Cells come from cells is correct component of cell theory.
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Clio has a vegetable garden and wants to increase the amount of nitrogen in the soil how can she most likely do this.
Please help me
What are the most common causes of agriscience accidents?
Answer:
Overturning machinery.
Explanation:
Hope this helps <3
How do you define professionalism
Answer:
The conduct ,aims or qualities that characterize or mark a profession or a professional person is known as professionalism.
Explanation:
Hope it helps.
The monomers that are joined by glycosidic linkages to form biological polymers are
Answer:
They form carbohydrates. The monomers are called monosaccharides.
Explanation:
Answer: Monosaccharides
Which of the following correctly describes the image below?
Protein Molocule
RNA Molocule
Amino Acid
Carboxylic Acid
Select the correct answer.
Which act or regulations protect the AFN industry from food emergencies?
OA
Federal Insecticide, Fungicide, and Rodenticide Act
Homeland Security Presidential Directives
OB
OC Comprehensive Environmental Response Directives
Perishable Agricultural Commodities Act
Reset
Next
Answer:
Homeland Security Presidential Directives help in food emergencies
Explanation:
Which substance is produced as a by-product of both glycolysis and aerobic respiration?
Answer:
Carbon dioxide and water I believe
Explanation:
A two-year-old weighing 25.2 lb is admitted to the hospital with fever and diarrhea. Normally the child weighs 29.6 lb. How much fluid (in liters) needs to be replaced in the child's system?a. 1Lb. 1.75 Lc. 2 Ld. 4.4 L
Answer: C.) 2L
Explanation:
Given the question :
A two-year-old weighing 25.2 lb is admitted to the hospital with fever and diarrhea. Normally the child weighs 29.6 lb. How much fluid (in liters) needs to be replaced in the child's system?
Normal body weight if the baby = 29.6lb (pounds)
Weight of baby die to fever and diarrhea = 25.2lb(pounds)
Weight loss due to diarrhea and fever :
(29.6 - 25.2)lb = 4.4 lb
Amount of fluid needed to be replaced in litres = weight loss due to sickness
Then we need to convert 4.4lbs to Litre (L)
1 pound (lb) = 0.45359 liter (l)
4.4 lb = (4.4 * 0.45359) L
= 1.995796 L
= 2L
Notice that the by-products of one process are used as the reactants for the other process. This is referred to as the ____________ of molecules.
Answer:
cycling of molecules
Explanation:
In a cell, the flux of energy is associated to the cycling of molecules among subcellular compartments. In coupled reactions, the cycling of molecules between mitochondria and chloroplasts is required to produce the flow of energy and to sustain the life of the Earth. Chloroplasts produce chemical energy by using solar energy to convert water and carbon dioxide (CO2) into oxygen (O2) and high energy carbohydrates (i.e., sugars and starches). Subsequently, in the mitochondria, the process of cellular respiration enables to convert the carbohydrates into high energy molecules (ATP), releasing water and CO2.
Which statement is true? A.Simple sugars are made of polysaccharides. B.Amino acids are made of proteins. C.DNA molecules are made of nucleotides. D.Glycerol is made of fatty acids.
Answer:
C. DNA molecules are made of nucleotides.
Explanation:
DNA molcules are made up of building blocks called nucelotides.
These nucleotides are made of a sugar group, nitrogen base, and phosphate group.
These nucelotides bond together to form a strand of DNA.
Answer:
its c
Explanation:
someone please help me with this :,,,,,,,,,,,)
Answer:
1. 1.26823082 mL
2. 0.5 g/mL
Explanation:
The density formula is:[tex]d=\frac{m}{v}[/tex]
1.
Rearrange the density formula for v,
[tex]d=\frac{m}{v}[/tex]
[tex]d*v=\frac{m}{v}*v[/tex] Multiply both sides by v.
[tex]d*v=m[/tex]
[tex]\frac{d*v}{d} =\frac{m}{d}[/tex] Divide both sides by d.
[tex]v=\frac{m}{d}[/tex]
Volume is found by dividing mass by density. The mass is 20 grams and the density is 15.77 grams per milliliter.
[tex]m= 20 \ g\\d= 15.77 \ g/mL[/tex]
Substitute the values into the formula.
[tex]v=\frac{20 \ g} {15.77 \ g/mL}[/tex]
Divide. Note the grams, g, will cancel.
[tex]v= 1.26823082 \ mL[/tex]
2.
Use the density formula.
[tex]d=\frac{m}{v}[/tex]
Density is found by dividing mass by volume. The mass is 10 grams and the volume is 20 milliliters.
[tex]m= 10 \ g\\v= 20 \ mL[/tex]
Substitute the values into the formula.
[tex]d=\frac{10 \ g}{ 20 \ mL}[/tex]
Divide.
[tex]d= \frac{1}{2} \ g/mL[/tex]
[tex]d= 0.5 \ g/mL[/tex]
Which of the following is not true regarding how organisms are able to exchange information via cell signaling in response to both internal changes and environmental cues?a. Cells communicate by direct contact.b. Cells communicate over both short and long distances.c. Hormones are reached by all cells but only target some cells.d. Secreting cells affect all neighboring cells
Answer:
Secretory cells affect all neighboring cells
Explanation:
The secretory cells affect only the cells that contain the receptor for the hormone they release, that is why it does not matter if the cell is contiguous, adjacent or distant, the target cell will only be affected by the hormone regardless of the proximity because it has a specific receptor.
What are the three types of symbiotic relationships? with definitions please
Answer:
The three types of symbiotic relationships are mutualism, parasitism, and commensalism. In mutualism, both organisms gain something, in parasitism, one organism gains and the other loses, and in commensalism, one gains and the other doesn't gain or lose
Answer:
living in close association.
Explanation:
According to evolutionary theory, behaviors that optimize survival and reproduction are favored by natural selection and therefore more likely to persist. How, then, can we explain the evolution of altruism, which is by definition costly to the self
Answer:
Altruism could be helpful for the survival of relatives
Explanation:
Altruism behavior is produced when an organism decreases its fitness in order to increase the chances of survival in other individuals in the population. It is believed that altruistic behavior could have evolved as an adaptation associated with the survival of relatives from the same family. In consequence, if this were the case, altruism could ultimately be considered as a selfish behavior because it aims at passing on of genes through the survival of relatives which could benefit with this behavior.
Scientific models can never be changed.
Please select the best answer from the choices provided
OT
F
Answer:F
Explanation:I got it right
Pine trees that are too tall or too short do not do as well as pine trees that are average in height. The short trees do not get as much sun and the tall trees break off in storms. How is this an example of stabilizing selection.
Answer:
The first Constitutional Amendments were proposed shortly after the Constitution itself. Larely focussed on protecting individual liberties
Explanation: isn't it.
The monomer of DNA is nucleotides. Which type of macromolecule is DNA
Answer: Nucleic Acid
Explanation:
Made out of nucleotides
1) An example of International System of Measurement (SI) unit is: A) pound B) mile C) liter D) ounce
Answer:
pound
Explanation:
Evaporative cooling is a product of evolution that has evolved in some organisms for use under certain environmental conditions. Circle the organisms or conditions below that you think are most likely to use evaporative cooling.
Answer:
In order to lower the temperature.
Explanation:
Mammals and birds uses evaporative cooling due to their high body temperature because this evaporative cooling removes the high temperature from the body. In this process, the water present in the body absorb all the extra heat and remove this extra heat from the body with change its state from liquid to vapors and the body's temperature cools down. This evaporative cooling is occurs in the process of sweating.
In an experiment, the thing you compare your experimental results to is called the
the thing you compare your experimental results to is called the control group.
What do you mean by control group?Control group is the standard to which comparisons are made in an experiment. Many experiments are designed to include a control group and one or more experimental groups.
Moreover, some experiments use multiple control groups to gather more information and improve the accuracy of results. For example, many medical studies include positive, negative and placebo.
The control group and experimental group are compared against each other in an experiment. The only difference between the two groups is that the independent variable is changed in the experimental group.
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A horticulturist (plant scientist) complains to the city that a nearby residence is ruining his flowers because of the detergent being used to wash their cars. The soap runs into a stream that goes near his flower beds. As an inquiring scientist, you want to find out whether soap can affect flower growth. You will need to set up your experiment (using the animation below) and publish your findings (see questions below). Write your hypothesis (should be in a complete sentence and describe what exactly is being tested)
Answer:
IF flowers are exposed to detergent, THEN the flowers will grow poorly
Explanation:
Hypothesis of an experiment gives a testable explanation to a problem. It is a predictive statement that explains the possible solution to a given problem, but subject to testing via experimentation. Hypothesis usually goes in an IF (cause), THEN (effect) format. That is, it shows how an independent variable will affect the deoendent variable.
In this experiment involving the effect of soap on flower growth, a possible hypothesis will be that: IF flowers are exposed to the detergent, THEN the flowers will grow poorly. This hypothesis, which is subject to testing by conducting an experiment, gives a possible solution to the problem of how detergent is affecting plant growth.
A change in genotype, but not in phenotype, is most likely due to _________.
A change in genotype, but not in phenotype, is most likely due to neutral mutation.
A mutation consists of a spontaneous and unpredictable change in the sequence of genes that make up the DNA of a living being.
A neutral mutation is one that has no consequences on the phenotype, that is, it has no effect on the observable characteristics of an organism.Neutral mutations has effects on the genotype because it generates a change in the order of nucleotides that creates triplets that code for equivalent amino acids as basic amino acids.Therefore, we can conclude that a neutral mutation does not affect the viability of the living being.
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How does exponential growth differ from logistic growth? R‐selected species have exponential growth rates, whereas K‐selected species always experience logistic growth. Exponential growth occurs when the population is at its biotic potential, whereas logistic growth is limited by the carrying capacity of the environment. Exponential growth is expressed as doubling time, whereas logistic growth is expressed as a percentage change. Exponential growth occurs when a population is very large, whereas logistic growth occurs when a population is at its minimum viable number. Exponential growth results in a J‐shaped curve, whereas logistic growth results in an S‐shaped curve.
Answer:
Exponential growth occurs when the population is at its biotic potential, whereas logistic growth is limited by the carrying capacity of the environment.
Explanation:
A population that exhibits a logistic growth model, depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.
If the population size, N, is inferior to K (N<K) the population can still grow. When N approximates to K, the population´s growth speed decreases. When N=K, the population reaches equilibrium, and when N is superior to K (N>K) the population must decrease in size because there are not enough resources to maintain that size.
The sigmoid curve represents the logistic growth model. At the beginning population grow slowly. In the exposed example this occurred when the small group of 10 foxes moved to the new environment, starting a new population. In the second stage, the population size increases rapidly. Probably this happened when foxes reached a number of 40 individuals. And finally, slow and gradually, the population reaches the equilibrium point, K, which depends on resource availability. This point belongs to the stage where food starts to become harder to find, and much of the living space is occupied.
A population that exhibits an exponential growth model increases in proportion to its size. The increase in the population size depends on the individual´s reproduction rate: a population that grows at constant exponential rate gains individuals faster as the population increases in size.This model is based on unlimited resource availability which means that there is no effect depending on density. There is no competition for resources. Natality and mortality rate do not depend on density. There is a constant growth rate per capita and it is proportional to the population size.
These two substances can enter a cell through the phospholipids. Oxygen and carbohydrates Carbon dioxide and sugar Oxygen and sugar Oxygen and Carbon Dioxide
Answer:
Oxygen and Carbon Dioxide
Explanation:
Oxygen and carbon dioxide can enter cells through the phospholipid bilayer through simple diffusion with the concentration gradient.
This is because these substances are small and uncharged.
Other molecules like sugars and carbohydrates are too big to enter through the phospholipids.
What does the presence of these coral fossils suggest about the location of North America 370 million years ago?
Answer:
These fossils indicate that North America must have had a much warmer (i.e a tropical environment 370 million years ago)
Explanation:
Corals are marine animals whose skeletons are easily fossilized and thus have an extensive fossil record. There are many fossils of extinct corals in North America. For example, Lophophyllum is a North American extinct genus of corals dated at 320 million to 290 million years ago (i.e., from the Late Carboniferous period). In general, corals live in warm seawater, and thereby their fossil records can be used as indicators of environmental conditions.