Select all of the answers that apply. The Cretaceous-Tertiary extinction, the most famous of the Big Five, has been attributed to what major event(s) that triggered the extinction of the dinosaurs? an asteroid hitting the earth massive volcanoes erupting around the world rapid growth of forests on land surfaces falling sea levels increased competition from mammals

Answers

Answer 1

The major event that is generally contributed to the Cretaceious-Tertiary extinction is the impact of an enormous asteroid, known as the Chicxulub asteroid. The asteroid struck near the Gulf of Mexico, and evidenced supports that it had a destructive effect on the entire globe.

While the asteroid is generally accepted as the main event, scientists argue the relevance of changing sea levels and massive volcano eruptions as contributing causes as well.

Large-scale deforestation (likely due to low sunlight caused by the ash from the asteroid impact and volcano eruptions ) occurred and contributed to the mass extinction, but rapid growth of forests on land was not a factor. In fact, the opposite occurred.

Mammals benefited from the extinction of larger reptilian predators, and in the millions of years that followed, became the dominant class of animal. However, when they coexisted, they occupied a very different niche from the dinosaurs, and in any case mammals were not abundant enough to compete with the dominant species of the time.

Answer 2

-massive volcanoes erupting around the world -rapid growth of forests on land surfaces -falling sea levels -increased competition from mammals

Related Questions

What is the name given to the branch of science that pertains to the composition of matter and the changes that matter undergoes?
a. biology
b. chemistry
c. physics
d. physical science?

Answers

The answer is B.) chemistry

Which of the following pairs share similar chemical properties?
Select one:
a. oxygen (O) and Chlorine (Cl)
b. Helium (He) and Hydrogen (H)
c. Fluorine (F) and Neon (Ne)
d. Bromine (Br) and Iodine (I)

Answers

The periodic table is organized into columns (up and down) which share similar properties..periodicity.

If you look at the periodic table, you'll see that bromine and iodine appear in the same periodic column...they share similar chemical properties. Therefore, the answer is D.

I am pretty sure that the pair is a or c

Someone who has broken an arm and has had a cast on it for months will notice a distinct shrinking of the arm once the cast is removed. why does this happen?

Answers

The answer to this question would be : If the muscles are not used they will atrophy.

Muscle cell will adapt to the intensity of the use. If someone uses the muscle to light heavyweight frequently, the muscle will become bigger so it can be used more. If the muscle is not used for a long time, it will slowly shrink.
When a broken arm had a cast, the movement of muscle is prevented so the arm muscle cannot be used until the cast removed.

At about the eight-cell stage, a third process is added. this is called _______, where cells begin to specialize.

Answers

The answer to this question is: Differentiation
Cell differentiation refers to an occurrence when less specialized cells started to develop some characteristics that made them a specialize cells.
This specialization will make the cells have different function that will be used by different part of our body, such as muscle cells, brain cells, blood cells, etc.

Garbage, trash, junk, and sewage are examples of _____ waste.

agricultural

recyclable

hazardous

solid

Answers

I believe It is Solid waste either that or hazardous

The right answer is solid.

A waste is an object or substance that has been physically or chemically impaired or is no longer usable and / or is intended for disposal or recycling.

These wastes are difficult to eliminate without causing deleterious effects. In Asia-Pacific, 90% of urban solid waste ends up in a wild dump, and it is one of the first sources of diseases. In Mumbai, more than 12 percent of urban solid waste is burned in cities or landfills, polluting the air and soil.

Is a group of species that includes an ancestral species and all of its descendants?

Answers

A clade is a group of species that includes an ancestral species and all of its descendents

Most of your cooking equipment is copper and your utensils are silver, so which sanitizer would you NOT want to use

Answers

If most of my cooking equipment is copper and my utensils are silver, I will not want to use a sanitizer that contain CHLORINE. This is because, chlorine in the sanitizer will react with the silver of the utensils to form a black layer of silver chloride on the utensils. Also, chlorine will react with the copper of the cooking equipment to form a cloud of copper ll chloride which will dissolve when it comes in contact with water forming a blue green solution.

Which organelle is involved in the synthesis of fatty acids and the detoxification of alcohol?

Answers

peroxisomes detoxify alcohol as well as other toxins

What makes up matter?

Answers

A definition of "matter" more fine-scale than the atoms and molecules definition is: matter is made up of what atoms and molecules are made of, meaning anything made of positively charged protons, neutral neutrons, and negatively charged electrons.

Atoms and molecules

Which unit of measurement is used in the metric system?
Tons
Kilograms
Miles
Gallons

Answers

Killograms i believe anyway

Answer:

Killograms i believe anyway

Explanation:

Alison wants to construct the perpendicular bisector of mn¯¯¯¯¯¯¯. what should alison do for her first step?

Answers

Alison should start by putting the point of the compass on the extreme M (or N) and draw an arc with the compass opened more than 1/2 of MN and less then the whole MN length. This should be her first step.
She should then do the same, but now placing the point of the compass on the other extreme (extreme N or M, depending on which one she started by).
She should now repeat the process but to the other side of the line. After all she then traces a line that passes both crossings of the arcs.

An olfactory stimulus travels from a receptor to the ________.

Answers

The appropriate response is the Olfactory Bulb. It is a mind structure in charge of our feeling of smell. Situated at the tip of the olfactory projection, the knob forms data about smells in the wake of getting tangible contribution from the nose.

The olfactory bulb is a heap of afferent nerve strands from the mitral and tufted cells of the olfactory globule that interfaces with a few target areas in the mind, including the piriform cortex, amygdala, and entorhinal cortex.

Final answer:

The olfactory stimulus travels from a receptor to the olfactory bulb, which is located at the tip of the frontal lobe. From there, the information is sent to regions of the limbic system and the primary olfactory cortex.

Explanation:

The olfactory stimulus travels from a receptor to the olfactory bulb. The olfactory receptor neurons, located within the olfactory epithelium in the nasal cavity, send signals to the olfactory bulb which is a bulb-like structure at the tip of the frontal lobe where the olfactory nerves begin. From the olfactory bulb, information is sent to regions of the limbic system and the primary olfactory cortex.

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How is brain tissue different from other tissues during hyponatremia?

Answers

Final answer:

In hyponatremia, brain tissue responds differently from other tissues due to the presence of neurons, the additional protection of the blood-brain barrier, and the specific osmotic balance required for its function. The excess water induced by hyponatremia causes neurons to swell which can lead to brain damage or death.

Explanation:

The difference of brain tissue from other tissues during hyponatremia is greatly influenced by the brain's unique characteristics and the way it responds to low sodium levels in the body. Hyponatremia is a condition characterised by a decrease in blood sodium levels, which can result from an imbalance of sodium in the body's fluid compartments or dilution of sodium due to water retention. This condition can trigger increased entry of water into cells via osmosis, because the concentration of solutes within the cell is greater than the concentration in the diluted extracellular fluid.

While this water influx can cause swelling or edema in various kinds of cells, it affects brain cells or neurons quite significantly. The brain, as a part of the central nervous system, is packed with neurons which are highly sensitive to changes in their surrounding environment. The excess water entering neurons during hyponatremia can cause the cells to swell. This swelling of neurons in the brain can lead to severe consequences, potentially resulting in brain damage or even death.

Furthermore, the brain is protected by the blood-brain barrier which limits the interaction of circulating materials with the central nervous system. Therefore, the impact of hyponatremia on the brain might be different compared to other tissues because of this additional layer of defence. Additionally, the osmotic balance between water and spinal fluid in the brain is crucial to its function, and any imbalance could lead to critical conditions.

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Hyponatremia causes brain tissue to behave differently due to its sensitivity to changes in sodium levels and water balance. The Blood Brain Barrier emphasizes the need for stringent regulation to prevent brain damage. Timely medical intervention is crucial to avoid severe neurological consequences.

In hyponatremia, brain tissue behaves differently compared to other tissues because of its sensitivity to changes in sodium levels and water balance. When the blood sodium decreases due to conditions like water retention or congestive heart failure, water enters cells by osmosis, which can result in cell swelling. Specifically, the swelling of neurons in the brain can be dangerous, leading to brain damage or death. The brain is particularly vulnerable during hyponatremia because neurons cannot accommodate excessive swelling without causing symptoms like nausea, vomiting, headache, and even coma.

Furthermore, the presence of the Blood Brain Barrier (BBB) emphasizes the need for stringent regulation of the brain's microenvironment, including potassium and sodium ions, to maintain neuronal function and prevent brain tissue damage.

Jan's hypothesis was proven to be correct by other students' experiments. It's possible her hypothesis can be made into a ____.
A.law
B.fact
C.educated
D.guess theory

Answers

B, fact. As a fact is a real given information, most of the time by proven evidence.

Answer:

The answer is B. Fact

Explanation:

A hypothesis is the step of the scientific method in which an opinion is given about an environmental event that has been observed and analyzed. This hypothesis is generated with the purpose of answering a question of the "Why" of the observer events, and must always be experienced and demonstrated to know its truthfulness.

Since Jan's hypothesis, after having been tested, obtained good results, positive conclusions can be drawn from this hypothesis and can be considered as a scientific fact, because it has the approval of the scientific method.

How the process of natural selection canexplainhow evolution occurs?

Answers

In natural selection, there are three main things you need to know. There must be a variance in the genepool of course, or else to selection or evolution will take place. There also must be a selective force and time. Now, lets say that there is a population of many colored moths. But lets say that the brown colored moth blends in with the environment. This means that predators (selective force in this case) will have a much harder time finding these brown moths instead of easily finding some of the other colored moths (variation). This means that the brown moths will survive at a much higher rate because the are harder to find, and over time, the gene pool will narrow down to just brown moths because the rest of the moths die out due to predators and competition. This also means that this moth species has evolved over time to just become the brown colored moths only. Hope you can understand this but feel free to ask for clarification.

When is a model useful in scientific investigations?

Answers

A model is useful in wide varieties but it is mostly useful when doing scientific investigations when having to experiment and when finding out the result or the conclusion to a study as it could serve as a basis as to how the study had resulted or formulated.

What protects most bacteria from swelling up and bursting in hypotonic solutions?

Answers

Exoskeleton(cell wall) which provides the bacteria with several benefits. This cell wall protects the bacterium from damage by encircling it with a tough, rigid structure. The primary function of the cell wall is to maintain the cell shape and prevent bursting from osmotic pressure, so this bursting process only occurs in animal and protozoa cells which do not have cell walls.

Carbohydrates are an important type of

Answers

Carbohydrates are an important type of FOOD MACRO MOLECULES.
Food macro molecules refers to the small chemical sub units of molecules which are found in food. There are four major food macro molecules, they are carbohydrates, proteins. lipids and nucleic acids.
Carbohydrate is an important source of fuel for the biological system.

Hypersecretion of glucocorticoids, often caused by a tumor, results in ________.

Answers

It results in cushing's syndrome.

Adjacent cells in lymphatic capillaries overlap each other loosely. what is the unique structural modification that increases their permeability?

Answers

These cells form a unique structural modification that increases their permeability that is known as the minivalves.

Adjacent cells are associated with adherents intersections on their horizontal films. They are found just beneath tight intersections. Their capacity is to give shape and strain to cells and tissues and they are adding the site of cell-cell flagging.

Describe a chemical indicator. What is it? What is it used for? How does it work?

Answers

A chemical indicator is what shows the acidity of items aka liquids by mesuring how acidic the item is.

A chemical indicator is what shows the acidity of items aka liquids by measuring how acidic the item is.

What is Chemical indicator?

Chemical indicators are used to check whether the requirements for a particular sterilization process have been completed in order to accomplish sterilization.

Chemical indicators make use of one or more substances that, when exposed to specific essential conditions like time, temperature, and sterilant, change physically or chemically in a way that is discernible to the human eye.

A steam indication strip, in which the chemical indicator employs a chemical pellet that transforms from a solid to a liquid phase when exposed to steam, is an illustration of a chemical indicator design that changes physically.

Therefore, A chemical indicator is what shows the acidity of items aka liquids by measuring how acidic the item is.

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What simple chemical test is useful in the identification of the mineral calcite or any of the minerals found in the carbonate group?

Answers

Putting vinegar on it... if it’s from the carbonate group it will bubble

Final answer:

The identification of calcite and other carbonate minerals is typically done by applying a drop of dilute hydrochloric acid (HCl) to a specimen and observing whether it effervesces. Dolomite, another carbonate mineral, react more slowly and may require scratching the specimen to produce a powder. Vinegar and barium chloride solution can also be used for carbonate mineral tests.

Explanation:

A simple chemical test commonly used to identify the mineral calcite and other minerals in the carbonate group involves using dilute hydrochloric acid (HCl). When a drop of this acid is placed on a sample of calcite, it will typically effervesce or fizz. This reaction occurs because calcite, which has the chemical formula of CaCO3, reacts with the acid to produce carbon dioxide gas. If the sample does not fizz, it may be dolomite, another mineral in the carbonate group. In the case of dolomite, scratching the specimen to create a powder and then applying the dilute acid will often result in a slower, more gradual fizz, indicating the presence of this mineral.

Another option for testing is to use vinegar, which contains acetic acid. While the reaction will be less vigorous due to the weaker nature of acetic acid, it can still be used to test for the presence of carbonate minerals. This test is versatile and, in addition to field use by geologists, it is also used in mineral identification labs.

Additionally, magnetite can be identified by its magnetic properties, and distinguishing between sulfates and carbonates can be done by adding barium chloride solution to a test salt, where the formation of a white precipitate can indicate the presence of these groups.

A Response Options Calculator (ROC) can be used when responding to an oil spill to help predict how the oil will change over time and determine which methods can be best used to clean it. What is the benefit of this type of tool?

A.) It allows the oil company to determine the amount of their losses.
B.) It measures the weather conditions to let responders know if they can start cleaning.
C.) It helps save time and money by finding the most effective clean up methods.
D.) It assesses how many people will be needed to completely clean up the entire spill.

Answers

I'm gonna have to say "B"

Answer:

Option C, It helps save time and money by finding the most effective clean up methods.

Explanation:

Response Options Calculator (ROC) is a simulation tool that helps in measuring the performance of the oil mill response system based on the information given to the system. It contain a database of oil and its products and thus allows one to add a response system of its own and asses its applicability and feasability. ROC helps in accessing the time period during which the oil spill can be recovered and dispersed before it starts creating nuisance in the water body on getting exposed to the local environmental conditions.

Hence, option C is the correct answer

Is it proper to put away cups and knives after you towel dry them?

Answers

No, It is not proper to put away cups and knives after you towel dry them. The best way to properly dry the cups and knives is by air drying them. Since, most of us are using appliances to touch our foods, it is more proper to let air dry because we don't know that the towel we are using has bacteria.

What is meant by a gateway substance? what is one example of a gateway substance what is wrong with assuming that use of a gateway substance causes increased use of other substances?

Answers

A gateway substance is something that may be menial but could lead to something bigger, an example is weed in the drugs world, weed is not hard to get and is usually a gateway drug to stronger types of drugs and potentially more dangerous

Answer:

Gateway substance on regular usage, make an individual habitual usage of same or more harmful drugs

Explanation:

Any drug which has the capabilities of becoming a mode of drug addiction for reuse again and again on usage for a short time period, then such drugs are called gateway substance.

Some common examples of gateway substance are alcohol, marijuana, nicotine. cocaine, heroin etc.

The gate way substance increase chances of an individual to take other drugs as it reduces the decision making capabilities of an individual

There are high chances that use of gateway substance can lead to dependence on more dangerous, addicting substances

What causes the differences in physical characteristics like hair color among people?

Answers

In genetics, the physical characteristics are referred as phenotype. Each character such as hair color in offspring is determined by a pair of genes. One gene is inherited from father and other gene is inherited from mother. The phenotype is determined by the dominant gene. The recessive gene of a pair does not show its effect in heterozygous condition. Therefore, the offspring inherits a dominant gene and a recessive gene then the dominant gene will show the character. This is called Mendel’s law of dominance.

The physical factors are referred as phenotype. Each factor such as hair color in offspring is specified by a pair of genes. One gene is inherited from father and other gene is inherited from mother.

What causes hair color changes?

Hair color changes result not only from modification of melanin production but also from alters in the hair structure itself, altering its visual properties.

A mixture of genetic, metabolic, nutritional, and developed disorders result in hair color changes.

Thus, Each factor such as hair color in offspring is specified by a pair of genes. genes are inherited from both parents.

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(Marine science honors)
Explain why ocean acidification seems to be speeding up, give specific examples.

Answers

Ocean acidification refers to the ongoing decrease in the pH level of the earth oceans which is caused by the uptake of carbon dioxide from the atmosphere. Ocean acidification seems to be speeding up because of the increased human activities which increase the amount of carbon dioxide in the atmosphere.
An example of human activities that speed up the ocean acidification process is the burning of fossils fuels, which continuously release more carbon dioxide into the atmosphere.

Anterograde movement of transition vesicles is from __________.

Answers

The rough endoplasmic reticulum and transported to the Golgi apparatus where they fuse with the Golgi membrane and transfered to lumen where the molecules are modified and sorted for transport to their next destinations.

Which of the following statements is true? a)During active transport, a material may be moved from an area of low concentration to an area of high concentration. b) During passive transport, energy is used to move material against a concentration gradient. c)During active transport, water is pumped across a membrane to equalize the concentration of salts on both sides. d)During passive transport, osmosis allows salts to move from one side of the membrane to the other to equalize concentrations on both sides.

Answers

A. The Active transport occurs when there is a movement of molecules across a cell membrane, from a region of low concentration to a region of high concentration, when a material is moved using the energy of the cells to move them against a gradient and other types of resistance.

Which life process is classified as autotrophic in some organisms and heterotrophic in other organisms?

Answers

nutrition - autotrophic make their own food (eg plants), heterotrophics get nutrition from eating other organisms (eg animals)

Answer:

Nutrition

Explanation:

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