Answer:
The above statement is true.
Explanation:
The shells of aragonite are affected by various ongoing earth dynamic processes, such as physical and chemical weathering and erosion of the rock layers that contain these fossils, chemical reactions between fossils and acid water dissolving the materials of the shells.
The older Paleozoic and Mesozoic rocks have undergone significant changes with increasing time due to the effects of events such as tectonism, volcanism, erosion and so on. So the fossils present in these rocks were affected and were altered. But the rocks of the Cenozoic era are of recent age, about 65-60 million years old. During this era, massive deposition of sediments has taken place throughout the globe which provides a suitable condition for the preservation of fossils like aragonite shells. So these fossils found in these deposits are not much altered.
Which of these substances does not protect against invaders in the
nonspecific immune response?
A. Saliva
B. Mucus
C. Tears
D. Urine
Answer:
Urine
Explanation:
just took the test. a p e x
8. How does this snake obtain nutrients from corn?
A. By eating the corn directly
B. By eating the grasshopper
C. By living in the cornfield
D. By eating the lizard
Answer:
D. By eating the lizard
correct answer
Explanation:
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Which chemical is most important in telling a plant when to flower?
phytochrome
nitrogen
carotenoid
chlorophyll
The chemical that is most important in telling a plant when to flower is phytochrome.
Which chemical is most important in telling a plant when to flower?Phytochrome is a blue-green pigment found in many plants, which regulates various developmental processes.Phytochrome is widely distributed in the plant kingdom. Although green leaves are the organs, which perceive daylight most effectively, their phytochrome content is very low. For this reason, most studies with phytochrome have used etiolated seedlings from which phytochrome has been obtained in highly purified form.The light receptors of plants are Phytochrome Red and Phytochrome Far Red. They are both color pigments found in leaves. They are chemically reactive and absorb red light at specific wavelengths. This chemical reaction tells the plant whether to continue vegetating or flowering.Hence, the phytochrome chemical is most important in telling a plant when to flower.
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Which conditions need to be in balance for cells to function? Check all that apply.
blood sugar
food intake
body water
body temperature
body mass
According to the context, blood sugar, body water and temperature are conditions that need to be in balance for cells to function.
What are conditions that need to be in balance for cells to function?They are the conditions by which the process of cell maintenance is consistent with the internal environment and is carried out by the coordinated action of blood sugar, body water and temperature.
Body water needs to be in balance, that is, the relationship between the fluids inside the cell (intracellular) and its external environment (extracellular) for cells to function.
Therefore, we can conclude that according to the context, blood sugar, body water and temperature are conditions that need to be in balance for cells to function.
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Suppose u saw a small organism move across your book would u conclude that this organism was unicellular or multicellular ?
Answer:
multicellular; single celled organisms are often too tiny to be seen without a microscope
Answer:Explained
Explanation:
There is great probability that the organism is multi-cellular as the single celled organism is too small to be seen by naked eyes and their size is generally of the order of 1 micron (one millionth of a meter)
While the multi-cellular organism can be easily seen from naked eyes.
Why does darkness affect the light-independent reactions of photosynthesis?
Plants stop their daytime activities and rest during the night, much like animals do.
Light independent reactions need more heat energy than nighttime temperatures often provide.
Mitochondria produce sugars more effectively in the darkness than chloroplasts do.
Light independent reactions require the energy gathered in the thylakoids.
The right answer is Light independent reactions require the energy gathered in the thylakoids.
* The dark phase corresponds to the phase of assimilation of CO2 which uses the energy molecules produced during the clear phase and which is carried out cyclically. This cycle is called the Calvin cycle and it takes place in the stroma of the chloroplast.
The assimilation of CO2 is done in four main stages, the first three of which take place within the Calvin cycle:
-CO2 fixation (carboxylation).
-Carbon reduction fixed.
-Regeneration of the CO2 acceptor.
-Synthesis of sugars.
* A thylakoid, or thylakoid membrane, in a chloroplast, is a flat membranous sac containing chlorophyll, or in other words, it is a cell membrane within the plant chloroplast that photosynthesizes. The thylakoid of a bacterium is also called the chromatophore.
A thylakoid is a membrane compartment within chloroplasts and cyanobacteria. They are the place of light-dependent reactions of photosynthesis. The thylakoids consist of a thylakoid membrane surrounding a thylakoid lumen (in the biological sense).
The answer is B. Light independent reactions need more heat energy than nighttime temperatures often provide.
What is a major drawback of using fossil fuels?
A. They warm the planet
B. They are flammable
C. they release oxygen when burned
D. They contain no greenhouse gases
Answer:
A, they warm the planet
Light sensitivity in euglena is provided by the _____.
Answer:
Light sensitivity in euglena is provided by the eyespot.
Which characteristics belong to a eukaryote
What is Holmes reaction to Dr.Roylott?
Answer:
Sherlock Holmes and Dr. Roylott only meet in person one time. Dr. Watson is present and describes the meeting. Roylott bursts into Holmes' sitting room and tries to interrogate and intimidate the detective
Sherlock Holmes views Dr. Roylott as a dangerous antagonist and uses his intellect to outsmart him.
Explanation:Sherlock Holmes is a fictional character created by Sir Arthur Conan Doyle. As a character, his reaction to Dr. Roylott, who is a villain in one of the Holmes' stories, would differ depending on the specific story being referred to.
In the story 'The Adventure of the Speckled Band,' Holmes takes Dr. Roylott as a serious threat. He recognizes Dr. Roylott's violent and disturbed nature, and is determined to protect the lives of his clients who are at risk. Holmes carefully investigates Dr. Roylott's actions and motives, and ultimately exposes his wicked intentions.
So, in summary, Holmes' reaction to Dr. Roylott varies depending on the story, but generally he views him as a dangerous antagonist and uses his intellect to outsmart him. Sherlock Holmes is always portrayed as a brilliant detective who is able to deduce and solve even the most complex cases.
4.) Photosynthesis is often described as two series of reactions, the light dependent and the light-independent or Calvin cycle reactions. Describe all steps that occur in the light-dependent reactions, including raw materials, energy transfer, and products.
Answer:
photosynthesis is important in many helio-centered plants
Explanation:
The light-dependent reactions of photosynthesis convert sunlight into chemical energy within the thylakoid membranes, where water is split to oxygen, protons, and electrons, producing ATP and NADPH as energy carriers for the Calvin cycle.
Light-Dependent Reactions of Photosynthesis
These reactions take place within the thylakoid membranes of chloroplasts. When sunlight hits the chlorophyll and other pigments, it excites electrons that move through an electron transport chain. This process leads to the splitting of water molecules (H2O) into oxygen, protons, and electrons (photolysis). The protons contribute to a proton gradient that drives the synthesis of adenosine triphosphate (ATP) through chemiosmosis. Moreover, the excited electrons transfer from the water molecules to nicotine adenine dinucleotide phosphate (NADP+), forming NADPH. The crucial raw materials for these reactions are water and sunlight, resulting in the production of oxygen, ATP, and NADPH.
All these products are then used in the Calvin cycle, or the light-independent reactions, to convert carbon dioxide (CO2) into glucose, a process powered by the ATP and NADPH generated in the light-dependent reactions.
6. In the DNA double helix, how are the two strands of DNA held together? A. Chemical bonds between base pairs hold the two strands of DNA together. B. Hydrogen bonds between the base pairs hold the two strands of DNA together. C. Hydrogen bonds between sugar groups and phosphate groups hold the two strands of DNA together. D. Chemical bonds between sugar groups and phosphate groups hold the two strands of DNA together.
Answer:
The correct answer is: B) Hydrogen bonds between the base pairs hold the two strands of DNA together.
Explanation:
The structure of the DNA molecule is given by two strands that are antiparallel and form a double helix. These two strands are held together by the hydrogen bonds that form between the nitrogenous base pairs that are located in the inside of the structure. Meanwhile, the sugar-phosphate backbones of the DNA are located on the outside.
Nitrogenous bases only pair with their complementary bases, meaning that adenine bases pair with thymine bases, and guanine bases only pair with cytosine bases.
What state best describes natural selection
Answer:
Louisianna
Explanation:
Seeds can grow into which of the following types of plants? A. Angiosperms and gymnosperms B. Angiosperms and ferns C. Gymnosperms and mosses D. Gymnosperms and liverwort
Angiosperms and gymnosperms that seed can grow.
Option: A
Explanation:
Angiosperms, that are also known as flowering plants, have “seeds” that are sealed off within an “ovary”, while gymnosperms do not have fruits or flowers and have uncovered seeds on the surface of leaves. Seeds of gymnosperms are often arranged as “cones”. The features and characteristics that distinguish angiosperms from gymnosperms are fruits, flowers, and “endosperm” in the seeds. Examples of “Angiosperms” are “monocots” like orchids, lilies, agaves, grasses and dicots like, peas, roses, sunflowers, maples and oaks. “Gymnosperm” examples include “non-flowering evergreen” trees like pine, fir and spruce.
muscle fatigue causes
Answer:
Weakness/soreness in the muscles
Which other technology would most directly help the survival of such an expanding population
Answer:
A system for growing food without using much land
Explanation:
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The given question is incomplete. The complete question is.
A country that has been relatively poor is starting to become wealthier. This has brought many people into the capital city, causing the population to grow very rapidly. Many new apartment buildings, as well as water and waste management systems, are being constructed to meet their living needs.
Which other technology would be a priority for the survival of such an expanding population?
A. Better communication systems
B. Structures for growing food in or near cities
C. Modern recreational facilities
D. New methods of public transportation
Answer: Option B
Explanation:
The technology that an help in the surviving of the expanding population is structure that can grow food in or near the cities.
The basic needs of the human beings is food, space and other necessary resources.
These resources cannot be avoided and needs to be fulfilled. The lack of space and other resources is completed excluding the food.
So, there is a need of structure which can grow food in the cities or somewhere else.
The cluster of developing cells from conception until birth is called an
Answer:
The cluster of developing cells from conception until birth is called an embryo.
From conception until birth, the cluster of developing cells is referred to as an embryo during the first eight weeks and a fetus thereafter. These cells undergo cell differentiation to form the diverse tissues and organs present in the fully developed infant.
Explanation:The cluster of developing cells from conception until birth refers to an embryo for the first eight weeks of development, and then is known as a fetus until birth. During this time, the cluster or group of developing cells is undergoing a process called cell differentiation where the cells transform into the many cells types necessary to form a complete organism. This process, which begins at conception, is fundamental to creating the diverse tissues and organs present in the fully developed infant.
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What is geologic time?
A) a period of time during which only rocks existed
B) a unit of time used to measure rock formation
C) the period before humans appeared on Earth
D) the time that has passed since Earth formed
Answer: (D)
a system of chronological dating that relates geological strata to time. It is used by geologists, paleontologists, and other Earth scientists to describe the timing and relationships of events that have occurred during Earth's history.
Explanation:
Geologic time is the vast amount of time since the Earth's formation, organized into eras, periods, epochs, and ages. It is used to understand Earth's complex history and it includes the evolution of life and the shifting of continents over time.
Explanation:Geologic time refers to the vast amount of time that has passed since the Earth formed. It is the chronology of the events and processes that have shaped the Earth, from its formation about 4.5 billion years ago to the present day. It provides a framework in which to understand the complex history of the Earth.
Geologic time is split into many different eras, periods, epochs, and ages. This allows geologists and scientists to organize and identify various geological events that have happened on Earth. Geologic time is primarily studied through the discipline of stratigraphy, which uses rock layers to determine the relative ages of rock formations.
Geologic time doesn't only focus on rock formations but, it includes the evolution of life, changing climates, and the shifting of continents over time. It doesn't cover just the time prior to the appearance of humans, it extends beyond and includes human history too.
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Distinctions between Earth’s crust and mantle are based on:
a. rock types
b. chemistry
c. seismicity
d. all of the above
Answer:
D. All of the above
Explanation:
This is the correct answer because you'd have to experiment to find out more about the Earth's crut and mantle and all these options prove just that :)
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An acid has a pH
greater than 7.
less than 7.
equal to 7.
none of the above
Answer: less than 7
Explanation: it’s acidic
Anything less then seven is acidic. Anything that has a pH of 7 is neutral, and anything above seven is basic
Hope this helped for this question and for future assignments!
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Enzymes are proteins that speed up reactions by
providing an additional energy source
supplying additional molecules for the reaction
removing inhibitors that slow down reactions
lowering the amount of energy required
Answer,
D/Lowering the amount of energy required.
Which organelle breaks down sugar molecules that supply energy to the cell ?
Answer:
Mitochondria
Explanation:
This organelle is the site of ATP synthesis. As the glucose molecules are broken down, the energy in electrons is used to pump H+ ions into the intermembrane space to create a proton motive force. This proton gradient is used by ATP synthase enzyme to create ATPs that is the energy currency of cells.
Answer:
Mitochondria
Explanation:
Visual summary for chapter 1 : what is Nutrition
What is Nutrition? Simply said, Nutrition is the study of food at work in our bodies, our source for energy, and the medium for which our nutrients can function. Think of nutrition as the building blocks of life.
The essential nutrients for life include carbohydrates, proteins, and lipids (fats), as well as fiber, vitamins, minerals, and water—the solvent for all soluble ingredients in the blood and cells. The absorption of nutrients starts the moment we begin to digest our foods, as they are transported to assist all the metabolic processes in the human body.
Good nutrition means getting the right amount of nutrients from healthy foods in the right combinations. Having nutrition knowledge and making smart choices about the foods you eat can and will help you achieve optimum health over your lifetime, and be a key to avoiding obesity, illness, and many of today’s most prevalent chronic diseases.
Nutrition is the study of the nutrients in food and how they affect our body's health. It involves understanding different types of nutrients, their functions, and concepts like energy balance and balanced diet.
Explanation:Nutrition is the study of the nutrients in food and how they affect our body's health. It explores the processes of digestion, absorption, and metabolism of nutrients, as well as the role of nutrients in growth, development, and disease prevention.
Nutrition involves the understanding of different types of nutrients such as carbohydrates, proteins, fats, vitamins, and minerals, and their functions in the body. It also encompasses concepts like energy balance, recommended dietary allowances, and the importance of a balanced diet.
Overall, the study of nutrition helps us make informed choices about what we eat to maintain good health and prevent nutritional deficiencies or diseases.
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The first generation of offspring from the cross of two parents is called the
A.F1 generation
B.F2 generation
C.short generation
D.P generation
Answer:
Option A, F1 generation
Explanation:
The first cross between any two parents resulting into a set of offspring with similar or varied genotype is known as the first generation. First generation is represented by F1
However, when the offspring produced in the first generation are crossed among themselves to produce offspring with similar or varied genotype , then this cross is known as the second generation. Second generation is represented by F2
Hence, option A is correct
.In conclusion, the answer to the question is A. F1 generation.
The first generation of offspring from the cross of two parents is called the F1 generation. A generation is a group of individuals born and living around the same time, while offspring refers to the progeny of an animal or plant.The F1 generation is formed when two individuals from different but similar strains, breeds, or subspecies mate with each other. When two true-breeding individuals with contrasting traits are crossed, the offspring will only have the phenotype of the parent with the dominant trait, while the recessive trait will be hidden in the genotype but will reappear in the F2 generation in a 3:1 ratio.In conclusion, the answer to the question is A. F1 generation.
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a rock of mass 12.5kg has a weight of 20n( newton) on the moon. what is the value for grv=avity on the moon?
Explanation:
F=ma
since gravity is the only force acting on it
F=mg where F is the force exerted on the body, m is the mass, and g is the gravity with units m/s^2
given that the mass is 12.5kg and the force is 20N
20=12.5g
divide both sides by 12.5
1.6=g
the gravity is 1.6 [tex]\frac{m}{ {s}^{2} } [/tex]
Thus, the gravity is 1.6m/s².
Given,
Mass: 12.5kg
Weight: 20n( newton)
F=ma, since gravity is the only force acting on it.
What is force?Force is defined as the push or pull on an object with mass which causes it to change its velocity.
F = mg whereas, F is the force exerted on the body, m is the mass, and g is the gravity with units m/s² given that the mass is 12.5kg and the force is 20N.
20N = 12.5g
then divide both sides by 12.5.
We get 1.6 = g
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How do the chloroplasts help the sea slug
Answer:
It allows the slug to capture energy directly from light, just like a plant would do through photosynthesis. Also, if the slug does't have it's normal food supply, Chloroplast can help the Sea Slug to survive for months.
Explanation:
some examples of lipids are cellulose and fiber. true or false
Answer:
Fast Facts: Lipids
A lipid is any biological molecule that is soluble in nonpolar solvents.Lipids include fats, waxes, fat-soluble vitamins, sterols, and glycerides.Biological functions of lipids include energy storage, cell membrane structural components, and signalingThere are many different types of lipids. Examples of common lipids include butter, vegetable oil, cholesterol and other steroids, waxes, phospholipids, and fat-soluble vitamins. The common characteristic of all of these compounds is that they are essentially insoluble in water yet soluble in one or more organic solvents.
False
The following drug reference book is written specifically for medical transcriptionists by a certified
medical transcriptionist and lists generic and brand name drugs, as well as how they are used and
prescribed
Answer: The correct answer is the following book:
________________________________________________
→ the "Saunders Pharmaceutical Drug Book " .
________________________________________________
Hope this is helpful to you!
Wishing you the best!
________________________________________________
Answer:
the "Saunders Pharmaceutical Drug Book " .
This book lets to look up more than 28,000 brand-name and generic drugs. It lets the localitation of the drug details a person needs, such as a correct spelling and capitalization, corresponding uses, cross references of brand names to generics, and the usual methods of administration.
Ryan rears sheep for their wool. Recently the quantity of wool that Ryan gets has diminished. This is because the new sheep are not that wooly. Ryan should add which nutrient to their feed so that the sheep becomes more wooly?
A.corn
B.iron
C.cottonseed
D. vitamin A
Ryan should add cottonseed to the sheep's feed to increase wool production, as cottonseed is high in protein, which is essential for wool growth.
Explanation:The student asked which nutrient needs to be added to the feed of sheep so that they become more wooly. The correct answer is cottonseed, which is high in protein and other essential nutrients that promote wool growth. To ensure healthy wool production, sheep require a balanced diet that includes proper levels of protein. Cottonseed is a byproduct of cotton processing and is often used in livestock feeds because it is a good source of energy and protein, which can help improve wool production.
It's important to note that providing adequate nutrition is just one factor in maintaining the health and wool production of sheep; genetics, overall health management, and environmental conditions also play significant roles.
Question 15 (5 points)
In____bonding positively charged metallic ions are surrounded by a cloud of electrons.
ionic
covalent
triple
metallic
Answer:
Metallic bonding
In metallic bonding positively charged metallic ions are surrounded by a cloud of electrons.