Diffusion and osmosis is important in the physiology of our body because osmosis plays a role of stabilizing the environment of an organism internally while the diffusion is essential as it provides function in the body for it to move naturally.
What precautions can a scientist take to be protected against charges of fraud?
Which type of scientist studies cultures? A. Life scientist B. Mathematician C. Physical scientist D. Social scientist
What does it mean to be unicellular
What forms when one oceanic plate is forced beneath another plate? Select one: a. ocean ridges b. a rift valley c. an ocean basin d. a subduction zone and deep sea trench
Answer:
Option d, A Subduction Zone
Explanation:
A subduction zone is formed when two plates collide and one sinks below the other. Thus, option A is incorrect
The other options are incorrect because
Oceanic ridge is the upliftment of mountains due to the convection currents beneath the ocean.
Rift Valley is formed by the subsidence of land mass due to the action of fault or rift.
Ocean basin and deep sea trench is a depression in the earth surface
The tree-like branches of a neuron that receive information from other neurons are called
Most plant proteins do not match our needs for essential amino acids and therefore are called _______________ proteins.
The role of atp complete the sentences with the appropriate words.
Wolverines spread across their range, with each individual patrolling a territory of about 320 km. what type of dispersion do woverines represent?
In the given case, the wolverines are demonstrating a uniform pattern of dispersion.
• The distribution pattern or the dispersion pattern of a population illustrates the alignment of the individuals within a habitat at a specific point in time. The general kinds of dispersion patterns are random, clumped, and uniform.
• The spreading of the organisms takes place in a fairly regular pattern in uniform distribution.
• This takes place when the individuals need to compete for a limiting resource like food or water.
In the given question, the wolverines are spreading uniformly to patrol their territory, thus, demonstrating a uniform pattern of dispersion.
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Which of the choices below lists the successive stages in coal formation from first step to last?
Final answer:
Coal formation proceeds through stages that represent increasing carbon content and energy potential: starting with peat, then transforming to lignite, subbituminous coal, bituminous coal, and finally, anthracite.
Explanation:
The successive stages in coal formation from first step to last are:
Peat - This is not actually coal, but the precursor to coal, formed from decaying plant material in wet environments.Lignite - Also known as 'brown coal', is the lowest rank of coal and has the lowest energy content.Subbituminous coal - This is a rank above lignite, with a higher energy content and lower moisture content.Bituminous coal - This has even higher energy content and is the most abundant form in the Eastern United States, though it contains sulfur impurities that contribute to acid rain.Anthracite - The highest rank of coal, with the highest energy content and a glossy appearance. Anthracite is less common and was largely depleted due to its desirability.Another term for the leaf's stake is.
Select one:
a. Stem
b. Flower
c. Petiole
d. Axillary bud
Final answer:
The correct term for the leaf's stalk is 'petiole,' which is a stalk connecting the leaf to the stem.
Explanation:
The term for the leaf's stalk is petiole. The petiole is the stalk that extends from the stem to the base of the leaf. An axillary bud is not the same as a petiole; it is an embryonic shoot located at the axil—the area between the base of a leaf and the stem—and can give rise to a branch or flower. Therefore, the correct answer is 'c. Petiole.'
What is the maximum number of significant figures that the graduated cylinder can be reported to?
An organism with a cell wall would most likely be unable to take in materials through ________.
An organism with a cell wall is unable to take in materials through endocytosis due to the rigid nature of the cell wall.
Explanation:An organism with a cell wall would most likely be unable to take in materials through endocytosis, which is the process by which a cell takes in substances through its membrane. The cell wall acts as a rigid protective layer around the cell membrane, preventing the cell from engulfing large molecules or particles.
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what 2 ways could you increase the momentum of an object?
Which feature do gas giants have that terrestrial planets do not?
Gas giants like Jupiter and Saturn lack solid surfaces and have thick atmospheres made of hydrogen and helium, with many moons and strong storms.
The primary feature that gas giants have, which terrestrial planets do not, is a lack of a solid surface. Instead of solid ground, gas giants such as Jupiter and Saturn have thick atmospheres composed mainly of hydrogen and helium. These gaseous envelopes are incredibly massive, and the pressure within these atmospheres is so high that any solid form would be crushed, much like the pressure experienced by a deep-sea diver but to a greater extent. Additionally, gas giants have many natural satellites and exhibit fast, strong winds and storms such as the Great Red Spot on Jupiter.
The reasons for these differences include the planet's formation location and composition. While terrestrial planets like Earth formed closer to the Sun and are predominantly rocky, gas giants formed far away where temperatures were low enough for hydrogen and helium to clump together.
Typhoid fever is caused by bacteria in contaminated food or drink in 1903 an outbreak of typhoid fever in Ithaca killed almost 80 people in addition more than 1,000 Ithaca residents became sick with the disease the population shares the public water source which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?
Answer:
density-dependent factor
Explanation:
Compounds formed from the attraction of oppositely charged ions are called _________. ionic compounds covalent compounds molecular compounds mineral compounds
The right answer is ionic compounds.
Ionic compounds do not contain distinct molecules but interacting ions
electrostatic.
An ionic compound is formed by the association of positive and negative ions.
An ionic compound is electrically neutral.
Here's an example : Calcium chloride
Writing of the ionic compound: CaCl2
Positive ion: calcium ion Ca ++
Negative ion: chloride ion Cl-
Answer:
The correct answer is option A, ionic compounds
Explanation:
Ionic compounds are formed between two elements in which one element is positively charged while the other element is negatively charged. The two elements being oppositely charged get attracted towards each other and form a compound. In this compound, one element gains the electron and becomes the anion with negative charge and the other one loses the electron and becomes positively charged and is known as Cation. s
For example
NaCl
Na has charge = +1
Cl has charge = -1
These two have equal and opposite charge and thus combine together to form ionic compound.
In a plant’s life cycle, how many sporophyte generations occur between one gametophyte generation and the next time that eggs and sperm are produced?
Ans.
Plants that show distinct asexual diploid and sexual haploid stages show alternation of generations. In these plants, the sexual haploid stage (or multi-cellular gametophyte generation), with n number of chromosomes alternates with asexual diploid stage (multi-cellular sporophyte generation), with 2n chromosomes.
The gametophyte produces gametes (eggs and sperms) that forms zygote and develop into microsporophyte that develops into sporophytes. After maturation, sporophytes produces spores that form gametophytes and again formation of gametes (eggs and sperms) will take place.
Hence, 'one sporophyte generation would occur between the one gametophyte generation and production of eggs and sperms in next steps.'
Brain weight triples during the first two years of life primarily because of the growth of _____.
Answer: dendrites
Explanation:
In 1961, two neurosurgeons were able to reduce seizure activity in epileptic patients by severing the corpus callosum. the neurosurgeons were:
The two neurosurgeons who were able to reduce the seizure activity that epileptic patients has experienced with the use of the method of severing the corpus callosum of the patients were namely Vogel and Bogen. They were able to reduce the seizure activity of these patients.
Answer:
Philip Vogel and Joseph Bogen
Explanation:
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Lipids, proteins, polysaccharides, and nucleic acids are large polymers that make up the different components of our bodies. Which element can be found as the backbone of all of these macromolecules?
1.Carbon
2.Phosphorus
3.Oxygen
4.Nitrogen
Carbon is the fundamental backbone element in macromolecules such as lipids, proteins, polysaccharides, and nucleic acids.
It's unique ability to form up to four covalent bonds makes it perfect to act as the central framework for complex molecules that are essential to life.
Tim makes a volcano demonstration for a class. He crafts the volcano out of clay, and then pours vinegar into the baking soda that is inside the volcano. What would be the best way for Tim to turn this demonstration into an experiment? He could pour the same amount of vinegar into several different volcanoes containing baking soda, repeating the demonstration. He would be answering the question “What happens when I pour vinegar into baking soda?” He could time how long the volcano bubbles after he pours the vinegar into the baking soda. He would be answering the question “How long will my volcano bubble?” He could measure how far the bubbles travel across the laboratory table after he pours the vinegar into the baking soda. He would be answering the question “How far will bubbles travel across a flat surface?” He could add different amounts of vinegar to the same amount of baking soda and time how long it bubbles each time. He would be answering the question “How does increasing the amount of vinegar affect the amount of bubbles that form?”
Answer:
Use several volcanos
Explanation:
An experiment has to take into consideration the variability of the process because each time it is run you will get a slightly different result. The more repetitions you have, the closer you will get to a better understanding of the mechanism you are studying. So the best way for Tim to turn his demonstration into an experiment would be the first choice, by using three volcanos, or preferably more.
Matter can be neither created nor destroyed, only converted from one form into another.
True
False
Temperature measures the total kinetic energy in a sample.
True
False
When an object cools, it is gaining thermal energy.
True
False
Reactions that absorb energy are exothermic.
True
False
Thermal energy always flows from a higher temperature to a lower one.
True
False
In science, the term heat is a synonym for the term temperature.
True
False
Kelvin temperatures can never have negative values.
True
False
what are the advantages and disadvantages of eating a nutritionally engineered product versus relying on a balanced diet to maintain health?
Mark weighs 254 pounds and would like to lose weight. he starts a walking program that expends 1.2 kcal/pound/hour. if he walks 45 minutes a day for one week, how many calories will he burn in one week?
Answer:
[tex]1600.2[/tex] calories
Explanation:
Given
Weight of Mark [tex]= 254[/tex] pounds
Rate at which Mark burns calories [tex]= 1.2[/tex]kcal/pound/hour
Total time in one week in terms of hours [tex]= 45 * 7[/tex] minutes
[tex]= 315[/tex] minutes
Number of hours in [tex]315[/tex] minutes is equal to
[tex]\frac{315}{60} \\= 5.25[/tex] hours
So, the total number of calories burned by Mark in one week
[tex]= 1.2 * 5.25 * 254\\= 1600.2[/tex] calories
By walking for 45 minutes each day at a rate of 1.2 kcal/pound/hour, a person weighing 254 pounds would burn approximately 1594 kcal in a week.
Explanation:To calculate how many calories Mark would burn walking in a week, we need to multiply his weight by the number of calories burned per pound per hour, then multiply this by the time he spends each day walking and the number of days in a week.
First, convert the daily walking time into hours: 45 minutes = 0.75 hours
Calories burned per day = 254 pounds x 1.2 kcal/pound/hour x 0.75 hours = 227.7 kcal/day
Calories burned in a week = 227.7 kcal/day x 7 days = 1593.9 kcal/week
So, Mark would burn approximately 1594 kcal in a week. This concept is important to note because typically, a person needs 1500 to 2000 calories per day to carry out daily activities. This value can increase if exercise is a regular part of one's day, as more calories are then required. Therefore, consistent walking can help contribute to weight loss along with a balanced diet.
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DNA would be found within which classification of biological molecules?
A.lipids
B.Carbohydrates
C.nucleic acids.
D Proteins
Answer: Nucleic acid
Explanation: Deoxyribonucleic acid are nucleic acid that consists of nucleotides which are monomers made of a pentose sugar, nitrogenous bases and a phosphate group.
Nucleic acids are most important of all the biomolecules that is found in the body. They are found in abundance.
Their main function is transmission of information from one generation to another generation.
Why might it be very difficult to visualize the separation of cis- and trans-2-butene by tlc?
The separation of cis- and trans-2-butene by TLC is difficult due to the slight difference in polarity and the potential for interconversion, which can make the polarity difference insignificant for separation purposes.
Explanation:To address the question of why it might be very difficult to visualize the separation of cis- and trans-2-butene by TLC (Thin Layer Chromatography), we must consider their physical and chemical properties. TLC relies on the different polarities of compounds to carry out separation. Since cis-2-butene is a polar molecule and trans-2-butene is nonpolar, we might expect TLC to be able to separate them effectively. However, the difference in polarity might not be sufficient to achieve a clear separation, due to their similar molecular structures and the fact that both compounds can interconvert when sufficient energy, such as heat or light, is applied, potentially complicating the TLC process.
The difficulty in separating these isomers arises from the fact that cis- and trans-isomers have similar boiling points and other physical properties despite their difference in polarity, which may not be distinct enough to be resolved by TLC. Generally, the stationary phase in TLC might not interact significantly differently with each isomer to produce a clear distinction between their spots on the TLC plate.
What feature of the skeleton eventually allow a child to maintain balance while walking and running?
Which two minerals would be most useful as grains on sandpaper?
The continuous removal and replacement of organic molecules in a cell are part of the process of
Answer: Metabolic turnover.
Explanation: The flow of substances in and out of a system and the rate at which a substance is depleted and replaced is known as turnover.
Therefore, the continuous exchange of cellular molecules by the breakdown, removal, synthesis and replacement is called metabolic turnover. Metabolic turnover is also the sum of all biochemical activities of the cells.
Respiration releases carbon dioxide, the molecule needed for photosynthesis.
a. True
b. False