Which of the following describes the difference in stimuli required to detect a difference between the stimuli?A. just noticeableB. signal detectionC. subliminalD. top down

C. independent variable, dependent variable

There are many different types of graphs, such as

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Answer:

True I think?

Explanation:

the formation of a caldera happens by collapse which means it is already at the bottom of the magma chamber.

Answer:

True

Explanation:

When the magma has erupted from a volcano in  large amount, the strength of volcano to hold its own weight reduces and hence the volcano collapses into itself thereby forming a cladera . Formation of cladera is triggered when the magma chamber start emptying. With the removal of magma, the center of volcano lying with in the ring fracture collapses.

Hence, the given statement is true.

Answer:

B

Explanation:

Y chromosomes are the male chromosome. A person with an XY sex chromosome pair will be male while that with an XX sex chromosome pair will be female. This is because the Y chromosome has a male-determining gene called the SRY. This gene is responsible for the development of testis.

Answer:

B

Explanation:

CRISPR-Cas9 is a gene-editing mechanism that is harnessed from bacteria’s immune system used to cut apart foreign genetic material such as that of bacteriophages. CRISPR-Ca9 has a guide sequence that is used to identify the target sequence. The Cas9 enzyme cuts this target DNA and is replaced with the required piece.

In cancer treatment, the mutated DNA can be replaced, this way, with the wild type.

CRISPR-Cas9 technology is useful in treating diseases like cancer as  it could remove from patients the genetic mutations that cause a specific cancer before the cancer begins. The correct option is B.

Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. These contrast with benign tumors, which do not spread.Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements.While these symptoms may indicate cancer, they can also have other causes.

Though cancer it not completely curable the rate of it's invasion can be slowed down by use of CRISPR-Cas9 technology that removes mutations which cause cancer before it begins.

Thus, option B is correct.

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Answer: because they are situated near aquifers

Explanation:

Aquifers is a underground layer of rock which can hold and release water in desirable amounts so petroleum industries claims the well are safe.

Answer:

A dung beetle is the answer.

The correct answer is D. Over 99 percent

Explanation:

Life on Earth has existed for 4.28 billion ago and during this time billions of species have emerged including bacterias, fungi, plants, animals, etc. However, due to evolution, changes in the environment and massive extinction events most species that lived in other geological periods have completely disappeared or extinct. Indeed it is estimated by biologists and scientists that over 99% of the species that ever existed on Earth do not live today or are extinct this has been proposed based on the millions of fossils discovered that suggest multiple species that cannot be found nowadays and evidence that shows many more species are extinct and there is no or little evidence about them. Therefore over 99 percent of species that once existed on Earth are now extinct.

Recessive alleles are not removed from populations over time because they can be passed on by heterozygous individuals (option A), sometimes confer selective advantages, can reappear due to new mutations, and are influenced by genetic drift in small populations.

Recessive alleles are not removed from populations over time due to several factors. Firstly, if an allele does not affect an individual's fitness, it can persist in a population despite being recessive. Individuals who are heterozygous (carrying one dominant and one recessive allele) can pass on the recessive allele to their offspring, even if the allele is not expressed in their phenotype (option A).

Moreover, some recessive alleles may confer a selective advantage in the heterozygous state. A classic example is the sickle cell allele, which provides resistance to malaria in heterozygous individuals without causing sickle cell disease. This means that the allele can be maintained within populations where malaria is prevalent.

Additionally, new mutations can introduce recessive alleles back into the population, and mechanisms like genetic drift can change allele frequencies purely by chance, especially in small populations. Therefore, recessive alleles can remain in the gene pool and sometimes even increase in frequency due to various evolutionary pressures and circumstances.

The false statement regarding the membrane potential is that the resting membrane potential is maintained solely by passive transport processes. In reality, the resting membrane potential is maintained by a combination of passive transport and the active transport process carried out by the sodium-potassium pump.

The statement which is FALSE regarding the membrane potential is: A) The resting membrane potential is maintained solely by passive transport processes. The resting membrane potential is not maintained solely by passive processes; it is a combination of passive and active transport processes. Passive transport involves the diffusion of potassium (K+) and sodium (Na+) ions through leakage channels due to concentration gradients. However, the sodium-potassium pump actively maintains the resting potential by using ATP to transport ions against their concentration gradients, specifically bringing two K+ ions into the cell and removing three Na+ ions out of the cell for each ATP molecule consumed.

"The correct answer is D) The resting membrane potential occurs due to active transport of ions across the membrane due to the sodium-potassium pump is FALSE regarding the membrane potential.

A) The resting membrane potential is maintained by solely by passive transport processes.

This statement is false. While the resting membrane potential is indeed maintained by passive transport processes, it is established by the active transport of ions by the sodium-potassium pump. The pump moves ions against their concentration gradients, which then sets up the conditions for the passive leak of ions that maintains the resting potential.

B) In their resting state, all body cells exhibit a resting membrane potential.

This statement is true. All body cells, when not actively sending signals, maintain a resting membrane potential. This potential is typically around -70 mV and is a characteristic of the cell's resting state.

C) The resting membrane potential is determined mainly by the concentration gradients and differential permeability of the plasma membrane to K+ and Na+ ions.

This statement is true. The resting membrane potential is a result of the unequal distribution of K+ and Na+ ions across the plasma membrane and the membrane's differing permeabilities to these ions. The inside of the cell is usually more permeable to K+ ions, which tend to move out of the cell, while Na+ ions are pumped out of the cell by the sodium-potassium pump.

D) The resting membrane potential occurs due to active transport of ions across the membrane due to the sodium-potassium pump.

This statement is false, which makes it the correct answer to the question. The resting membrane potential is not directly caused by active transport; rather, it is the result of the ion concentration gradients established by the sodium-potassium pump. The passive movement of ions down their concentration gradients through ion channels is what generates the resting membrane potential.

In summary, the sodium-potassium pump uses active transport to establish the concentration gradients of Na+ and K+ ions, but the resting membrane potential itself is a passive phenomenon resulting from the diffusion of these ions through ion channels."

A group of genes that work together is called operon .

An operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA) molecule, which therefore encodes multiple proteins

An operon consists of an operator, promoter, regulator, and structural genes.

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Answer:

The metabolic abnormality that is responsible for diabetes mellitus is THE INABILITY OF THE BODY CELLS TO ABSORB ENOUGH GLUCOSE FROM THE BLOOD.

Explanation:

Diabetes mellitus is a metabolic disease condition in which the glucose molecules that are present in the blood are unable to enter the body cells. This may happen as a result of lack of insulin hormone or inability of insulin hormone to carry out its functions. People with diabetes mellitus usually have high amount of glucose in their blood because of the inability of the glucose molecules to enter the body cells. Because the glucose molecules can not enter the body cells for energy utilization, diabetic patients usually feel weak, thirsty and hungry and the excess sugar in their blood usually come out with urine when they urinate.

Diabetes treatment usually involve the use of artificial insulin to lower the raised glucose levels.

Answer:

I believe its option b. carbon dioxide.

The correct answer is b. carbon dioxide, which is required for the light-independent reactions of photosynthesis to synthesize sugars.

The light-independent reactions of photosynthesis, also known as the Calvin Cycle or the dark reactions, require carbon dioxide to produce glucose (sugar). Therefore, the correct answer to the student's question is b. carbon dioxide. These reactions do not require light and instead utilize the ATP and NADPH produced during the light-dependent reactions to synthesize carbohydrates by fixing carbon dioxide. They take place in the stroma of the chloroplasts, where carbon dioxide enters the photosynthetic tissue through stomata and is then incorporated into organic molecules in a process known as carbon fixation.

Answer:

c. it provides strength to the plant by facilitating secondary growth

Explanation:

apical meristem is a region of actively dividing cells and found at both tip of plants that are shoots and roots, that are vitals for the plants to survive for many reason so yea i had nothing to say anymore i'm new with bio stuff

Answer:

remove excess waste

Explanation:

The function of the excretory system is to control homeostasis and remove excess waste.

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Answer:

The human skeleton is the internal framework of the body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.

Explanation:

Answer:

206 bones

Explanation:

The human skeleton is the internal framework of the body. It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together.

Answer: When corals are babies floating in the plankton, fish swim with them and protect them from harm.

Explanation: I just got it right. 100% trust

Answer:

A and C

Explanation:

A hypothesis can be true in some cases but is not a fact you know for certain. And to figure out if it is true, you must be able to test it.

Answer:

A.Capable of being false

C. Testable

Explanation:

Familiar - ??

Survivable - a hypothesis is a guess or conclusion, I'm sure every hypothesis is survivable...

Testable because to prove a hypothesis to be right, you obviously have to test it.

Capable of being false because a hypothesis is simply a guess or conclusion to a problem with limited information.

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Answer:

We breathe out carbon dioxide

Answer:

C

Explanation:

The diagram above shows chloroplast, where photosynthesis takes place

In the absence of oxygen, each glucose molecule during glycolysis undergoes a net gain of two ATP. However, these ATP may be used for other processes such as the transport of NADH, therefore the actual ATP gain can sometimes be effectively zero.

During glycolysis, glucose is broken down into two molecules of pyruvate. This process generates four molecules of ATP, but consumes two ATP in the early stages, resulting in a net gain of two ATP for each glucose molecule. However, these ATP molecules may be used for other functions, such as transporting NADH from the cytoplasm into the mitochondria, making the net ATP gain zero under certain conditions.

Under anaerobic conditions, where oxygen is not present, the ATP production is limited to those generated by glycolysis. Hence, the net yield remains as two ATP molecules per glucose molecule.

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Answer:

TRUE

Explanation:

Final answer:

The reptilian amniote egg with its protective outer layers is indeed a landmark in the evolution of life on land. - True

Explanation:

The amniotic egg is a crucial adaptation for fully terrestrial vertebrates, particularly reptiles, birds, and mammals. The development of amniotic membranes provided embryos with their aquatic environment, which significantly reduced the dependence on water for development and allowed amniotes to invade drier areas. This transition from water to land is marked by the difference between amphibians, which have shell-less eggs and are restricted to moist environments, and amniotes, which have protective shelled eggs.

Reptile eggs are surrounded by leathery or hard shells that aid in water retention and protection against desiccation. The amniotic egg consists of several parts that contribute to its success as a terrestrial adaptation: the amnion, which creates a fluid-filled cavity; the chorion, allowing for gas exchange; the yolk sac, providing nutrition; and the allantois, handling waste management and facilitating respiration.

Final answer:

The statement that incorrectly describes tissue perfusion is that the myogenic response is an example of extrinsic control, while it is an example of intrinsic control. Other options given correctly describe aspects of tissue perfusion involving kidney function, autonomic nervous system regulation, and local metabolite accumulation. So the correct option is c.

Explanation:

You asked which statement does NOT correctly describe tissue perfusion in the cardiovascular system. The correct answer is that the myogenic response is an example of intrinsic control of tissue perfusion, not extrinsic. Hence, the statement that does NOT correctly describe tissue perfusion is:

The myogenic response is a reaction to the stretching of the smooth muscle in the walls of arterioles in response to changes in blood flow through the vessel. It serves as a protective function to maintain homeostasis, trying to keep blood flow and pressure within certain limits to prevent damage to organs and tissues.

Here are the explanations for the other options that do correctly describe tissue perfusion:

Answer:

Asteroid impacts were uncommon when life is presumed to have begun.

Explanation:

The hypothesis about the origins of life on Earth are based upon the asteroid impacts. Basically, the hypothesis suggests that the asteroids brought the basic ingredients for the development of life on our planet. If a discovery is made though that in the period when life occurred the asteroid impacts were lacking, then this hypothesis will fall into water. This is because the hypothesis is directly dependent on the asteroid impacts, so if the case was that there weren't, or were very rare, the hypothesis will lose its basis.

Answer:

Asteroid impacts were uncommon when life is presumed to have begun.

Explanation:

For many years, there was extreme heat on our planet. The oceans were warm and shallow, Earth's primitive atmosphere containing carbon dioxide, water, and other gases that made the earth an inhospitable environment. In addition, lightning was common on early Earth.

The high temperature of the earth was due to the many volcanic activities, which caused the release of gases and lava. The atmosphere and the earth's surface were characterized by the absence of the ozone layer, the effects of ultraviolet rays and lightning strikes, and the bombardment of bodies from space, that is, asteroid impacts were common on primitive earth, including these impacts. responsible for the beginning of life. It is well known that most of the carbon and water molecules in existence today originated from asteroids that fell on Earth during this period.

Answer:

I believe it is called the gametangium, hope it helps :)

Answer:

half-life

Explanation: