The correct answer is: [B]: " False " .
___________________________________________________
To the contrary,
→ the fatty acid tails of the phospholipids are hydrophobic .
___________________________________________________
After a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving. True or false?
Final answer:
The statement is false; dye molecules continue to move randomly even after diffusing evenly throughout the water due to constant kinetic energy.
Explanation:
The statement that 'after a dye diffuses uniformly throughout a glass of water, the dye molecules are no longer moving' is false. Diffusion is the process by which molecules move from an area of high concentration to an area of lower concentration. When you place a drop of dye into water, it will diffuse until there is an even distribution throughout the water. This state is known as equilibrium, where there is no net movement of dye molecules, but the individual dye molecules continue to move randomly. It's important to note that molecular motion is constant due to kinetic energy, so even when the dye has spread out evenly, the molecules are still in motion.
How are streams and rivers in drainage basins affected by converting prairie land to farm land?
The streams and rivers in the drainage basins were the prairies are converted into farm land are mostly affected by the agriculture and its needs, as well as its consequences.
The agriculture demands water for irrigation, and most of this water comes from the streams and rivers, so that contributes to lowering of the water levels of the streams and rivers.
The agriculture also causes damage to the streams and rivers by polluting them. Namely, the pesticides, herbicides, and fungicides that are used for protection of the plants, partially end up in the low groundwater's, and in general, these waters are connected to the streams and rivers, so the pollutants end up in them, and that affects the biodiversity in them very badly.
Answer:
it d
Explanation:
4. What most likely caused the rabbit population to decrease over the first time unit shown in the following graph?
A. A disease in the population of rabbits.
B. A decreasing population of grasses.
C. An increasing population of hawks.
D. A higher than normal population of snakes.
The correct answer is option D
The population of rabbit over the first unit of time is reduced because the population of snakes was more than the normal population.
The predators of rabbits are snakes and if the population of predator will be more than the population of the rabbit then snakes will eat them. Ultimately the population of rabbit will be decreased.
Then after some time the population of rabbit increased as the population of snakes decreased.
The rabbit population to decrease because A higher than normal population of snakes. Option D
Why did the population decrease?Due to the fact that there were more snakes than usual during the first unit of time, the rabbit population decreased.
Snakes are the rabbits' main predators, and if there are more snakes than there are rabbits, the snakes will consume the rabbits. The rabbit population will eventually decline. Following that, as the population of snakes declined, the population of rabbit rose.
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What do you think would happen if you added a large volume of fresh water to the roots of the plant? answer in terms of osmosis and salt and water concentration. Would water move into the plant, out of the plant, or stay where it is? explain why.
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the ____.
Synapses are known as the junction between the two adjoining neurons. The nerve impulses are passed through this gap with the help of the neurotransmitters. In a synapse, the axon of one neuron is present in proximity with the receptor of another neuron. The synapse between the two adjacent neurons helps them to communicate with each other.
Hence, the blank can be filled with 'synapse'.
The correct answer is B. A synapse is the junction between neurons or between a neuron and another cell type. It functions to transmit signals and involves complex interactions of neurotransmitters aiding in cellular communication.
The correct term for the junction between adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is the synapse. Let's break down why this option is correct:
Definition: A synapse is the point where the axon terminal of one neuron comes near the dendrite or cell body of another neuron, or even a muscle cell (neuromuscular junction).Function: It facilitates the transmission of electrical or chemical signals between neurons or between a neuron and another cell type.Mechanism: When an action potential reaches the axon terminals, it causes the release of neurotransmitters from synaptic vesicles into the synaptic cleft.Types of Synapses: There are two types of synapses: chemical and electrical. Most common are chemical synapses where neurotransmitters are released to carry the signal across the synaptic cleft.Complexity: The structure and function of a synapse ensure precise communication between cells, a critical aspect of neural functioning.Thus, Option B, a synapse, is the correct answer.
Complete question:
The junction between the adjoining neurons where the axon bulb of one neuron comes in proximity with specialized receptor sites on another neuron is called the?
A. Junction point
B. A synapse
C. A joint
D. Constant bridge
PLZ HELP FOR BIOLOGY....
How many unique zygotes can a couple make?
You can only make one zygote but in some cases the egg splits and makes an identical twin.
Final answer:
A couple can potentially produce over 64 trillion unique zygotes due to the combination of meiotic genetic recombination, random fertilization, and occasional occurrences of twins, both dizygotic and monozygotic.
Explanation:
The number of unique zygotes that a couple can produce is astonishingly high due to the genetic variability involved in sexual reproduction. Each human zygote contains a unique set of 46 chromosomes, with 23 inherited from each parent. This genetic diversity arises from the process of meiosis during gamete formation, where chromosomes are shuffled and recombined. Additionally, random fertilization further increases genetic variability.
While most often a single egg is released and fertilized, resulting in a unique zygote for each pregnancy, there are cases such as dizygotic twins where two eggs are released and fertilized by two different sperm, resulting in two genetically distinct zygotes. Furthermore, unique scenarios can lead to monozygotic twins, where a single zygote divides to form genetically identical offspring. However, when considering the number of potential unique children a couple can produce without considering twins, the estimated number of genetically unique zygotes is over 64 trillion, showcasing the vast potential for genetic diversity.
In which two ways can scientists exhibit ethical behavior?
1 cleaning their labs regularly to boost hygiene
2 creating products that improve people’s lives
3 eating and drinking only during breaks
4 using only data that supports their hypothesis
5 remaining impartial about data while conducting experiments
Answer:
2. Creating products that improves people's lives.
5. Remaining impartial about data while conducting experiment.
Explanation:
Scientists are required to perform ethical practices during their tenure of research which does not include any bias, manipulation in observations and the research product can be used for the wellness of the society.
Among the options given, the following are correct options:
2. Creating products that improves people's lives.: The ethical practice of research should aim to provide benefit to the society rather than sceintists obtaining their own benefit.
5. Remaining impartial about data while conducting experiment.: Manipulated and biased observations should not be included in the data used for obtaining and describing the results. It is against the research ethics.
You must turn off the engine to stop CNG flow. A) True B) False
A) True
Explanation:To avoid these hazards, technicians must turn off the engine to stop CNG flow – especially before working on the vehicle. Most CNG vehicles have several ways of turning off the engine, so check the manufacturer's specific directions. Automatic release valve - installed on newer CNG systems.
Answer: True
Explanation:
CNG vehicles present potential hazards which include:
• Ignition sources as the ignition temperature is twice as high as gasoline.
• Contact with fuel
• Asphyxiation
• High-pressure CNG line
To avoid any of these hazards, you must turn off the engine to stop CNG flow and there are many ways by which you can turn it off.
Which phrases describe organisms that formed index fossils? Check all that apply.
are extinct
had hard parts
were generally large
were alive only for a short time
lived in a narrow geographic area
are extinct
were alive only for a short time
lived in a narrow geographic area
had hard parts
Answer:
Options (1), (2), and (4)
Explanation:
Index fossils are usually defined as those fossils that were present on earth for a very short period of time. They were very broadly distributed in almost all parts of the world. They were comparatively smaller in size and comprised of hard parts that were preserved under favorable conditions which are found at many places in the present. These are extinct species. For example, trilobites and ammonites.
These index fossils are very useful because it helps in determining the age of the fossils as well as rocks by applying the radioactive dating method.
thus, the correct answers are options (1), (2), and (4).
Describe Henrietta Leavitt's discovery, and explain why it was so important in the society in which she lived.
Henrietta Swan Leavitt discovered cepheids in 1908 during the investigation of different stars in the clouds. She published it by working more on it in 1912 and died in December 1921. This discovery was so important in the society in which she lived because the cosmologist of America was known for this discovery of Cepheids which is a relationship between period, luminosity and quivering stars which changes in light.
How do somatic and inherited mutations differ?
A. Somatic mutations exist in all cells in the body and inherited mutations only exist in the cell type that mutated.
B. Somatic mutations only affect males and inherited mutations affect any gender.
C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
D. Inherited mutations only affect males and somatic mutations affect any gender.
The right option is; C. Inherited mutations exist in all cells in the body and somatic mutations only exist in the cell type that mutated.
Inherited mutations are gene mutations that exist in almost every cell in the body throughout an individual’s life. Inherited mutations are inherited from a parent and can also be transmitted. They are also called germline mutations because they exist in the parent’s egg or sperm cells (gametes).
Somatic mutations are gene mutations that exist in only certain cell types that are mutated, not in every cell in the body and it take place at some time during an individual’s life. Somatic mutations are not inherited and cannot be passed. They are caused due to environmental factors (such as cigarette smoke or ultraviolet (UV) radiation) or due to error during DNA replication.
Answer:
A for plato
Explanation:
+50 pts How can you tell that algae filaments are composed of several cells rather than just one?
Non-scientific method:
Well, an easy way is observing the filament under a microscope: if it contains one cell it's unicellular and if it contains more than one cell it's multicellular.
Scientific method:
Filamentous algae are, in principle, single-celled. But, sometimes they can form colonies and evolve to be multicellular. But still, if they just form a colony they'll still be unicellular until they start changing.
Answer:
Unicellular.
Hope it helped,
BioTeacher101
What determines how much energy a human can receive from food?
A) How much nitrogen the food contains
B) How much the food molecules weigh
C) How much energy the food molecules have
D) How much oxygen the food contains
How much energy the food molecules have is the correct answer.
The presence of molecules determines amount of energy a human can receive from food. Food molecules have macromolecules such as carbohydrate, protein and fat which release energy when broken down into simpler molecules with the help of enzymes. The food we eat has these macromolecules which is used as a fuel for running the body so we can conclude that food molecules have energy.
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This chart shows a portion of a dichotomous key.dichotomous keywhich relationship can be determined from this dichotomous key?organism x and organism z have at least one observable trait in common.organism y has at least one observable trait in common with organisms x or z.organism x is in a different phylum than organism y.organism z is genetically closer to organism x than to organism y.
Which feature is not used to classify a virus?
Question 4 options:
genetic material
size
shape of the capsid
shape of its nucleus
Answer:
shape of nucleus
Explanation:
usa test prep
True or false? resource use per person is higher in the united states than it is in middle-income countries like china.
Which of the following is a TRUE statement?
A) Fats contain half the amount of energy than carbohydrates because they have less bonds.
B) Carbohydrates contain more energy than lipids because their bonds release more energy when broken.
C) Lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds to release energy when broken.
Answer: Option C
Explanation:
The energy that is required by the body is primarily stored in the form carbohydrates. The energy from the carbohydrates is easily converted into a usable form which is adenosine triphosphate.
The energy from the carbohydrates can be derived easily but from lipids it is difficult. Lipids contain more energy than carbohydrates because they contain more carbon to hydrogen bonds and when these bonds are broken down they release energy.
This energy is much more than carbohydrates. Hence, the maximum energy in the molecules is in lipids.
Match each enzyme with its correct function.
1.
ligases
2.
hydrolases
3.
proteases
4.
cellulases
5.
lipases
a.
generalized enzymes involved in digesting foods
b.
facilitate the joining of two substrates
c.
break down fats
d.
break down proteins such as meats, nuts, eggs, and cheese
e.
contained by plants to break down fiber
What does the D in DNA Stand for?
A. The name of the base that makes it up
B. The kind of macromolecule it is
C. The name of the sugar that makes it up
D. The number of strands that form it
The answer is (C) as the name of sugar that makes it up.
ExplanationDNA stands for Deoxyribose Nucleic Acid. Deoxyribose is a five carbon (pentose) sugar. Name deoxy is given to it because of containing one oxygen less than ribose. It's formed by replacing the hydroxyl group (OH) with hydrogen (H) at carbon number 2. In DNA structure Deoxyribose molecule is attached to the next phosphate molecule with the help of phosphodiester bonds.
DNA stands for Deoxyribose Nucleic Acid. Deoxyribose is a five carbon (pentose) sugar. Name deoxy is given to it because of containing one oxygen less than ribose. Thus, the correct option is C.
DNA is formed by replacing the hydroxyl group (OH) with hydrogen (H) at carbon number 2. In DNA structure Deoxyribose molecule is attached to the next phosphate molecule with the help of phosphodiester bonds.
DNA is a hereditary material which is present in human beings as well as all other living organisms. Every cell which is present in an organism's body has DNA which is the same. Most of the DNA is situated in the cell's nucleus and small amount of it can be found in the cell's mitochondria as well.
Information which is stored in DNA is stored as codes made up of four chemical bases namely, adenine, thymine , cytosine and guanine.Human DNA consists of 3 billion bases .The order of the bases determines information which is required for building and maintaining an organism.Thus, the correct option is C.
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Which of the organelles below were observable under high power? Check all the organelles that you could see.
-Cell Membrane
-Nucleus
-Vacuoles
-Ribosomes
Answer:
FOR HIGH POWER: CELL MEMBRANE & NUCLEUS
LOW POWER: CELL MEMBRANE
Explanation:
The organelles observable under high power are the cell membrane, nucleus, and ribosomes.
Explanation:The organelles that were observable under high power are the cell membrane, nucleus, and ribosomes. Vacuoles cannot be observed under high power because they are too small to be seen with a light microscope.
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Choose all the answers that apply.
The hypothalamus _____.
A. is part of the pituitary gland
B. regulates temperature and metabolism
C. is the control center for the endocrine system
D. links the endocrine and nervous systems
E. controls homeostatic responses
Answer:A,B,D,E
Explanation:
The hypothalamus is part of the pituitary gland, regulates temperature and metabolism, links the endocrine and nervous systems and controls homeostatic responses. Thus, the correct option is B.
What is pituitary gland?Pituitary gland is defined as a small, pea sized endocrine gland located at the base of brain below hypothalamus.
It releases several important hormones and controls the function of many other endocrine system glands.
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HELP ASAP PLEASE!!!! WILL MARK BRAINLIEST
A ______ is a prediction based on data and information you researched.
The answer is a hypothesis.
A hypothesis is a proposed explanation for a phenomenon. For a hypothesis to be a scientific hypothesis, the scientific method requires that one can test it. Scientists generally base scientific hypotheses on previous observations that cannot satisfactorily be explained with the available scientific theories.
Samantha hypothesized that tomatoes grow best at 25°C. To test her hypothesis, she designed ten different growth chambers that were each controlled for a specific temperature. Then, she placed ten tomato plants in each chamber and recorded the number of tomatoes produced after 2 months. She graphed the average number of tomatoes grown per plant for each temperature. What can the student conclude about her hypothesis based on the results? A. The results disprove her hypothesis. B. The results support and prove her hypothesis. C. The results do not support her hypothesis but do not disprove it. D. The results only support her hypothesis.
D.The results only support her hypothesis
is there any other info?
The correct answer is D. The results only support her hypothesis. I just answered this question on study island and this is the correct answer.
How can you tell from a dot diagram how many covalent bonds can be formed in an element?
A: By the number of protons in the dot diagram
B: By the number of valence electrons in the dot diagram
C: By the number of neutrons in the dot diagram
D: You can not tell the number of covalent bonds from a dot diagram.
the answer is B by the number of valence electrons.
In the open ocean, _____ are the main producers.
phytoplankton
zooplankton
ocean plants
symbiotic algae
I believe its Phytoplankton.
Answer:
-Phytoplankton.
Explanation:
Producers in an ecosystem are autotrophic organisms that can synthesize food by their own. Phytoplanktons are autotrophic, microscopic marine organisms, considered as the main producers in the ocean ecosystem.
They include photosynthetic algae and bacteria, which use sunlight as source of energy and convert it into chemical energy (as food) for consumers.
Thus, the correct answer is option). phytoplankton.'
From the Bohr Model diagram, assuming the atom is neutral, what element is represented by the diagram?
diagram for hydrogen
Answer:
Hydrogen
Explanation:
Bohr Model: In this model negatively charged electrons orbits a positively charged nucleus like the planets orbiting around the sun. Coulomb force between the negatively charged electrons and positively charged nucleus is mathematically akin to the gravitational force of the solar system. Important points are-
The electrons orbit the nucleus in the orbits that have a set energy and size. Orbital energy is related to its size, highest energy is found in the largest orbit.The radiation is emitted or absorbed during the movement of electrons from one orbit to the other.Bohr Model of Hydrogen :
The example of hydrogen atom is simplest in case of Bohr model or for a hydrogen-like ion in which the electrons which is negatively charged orbits around a positively charged nucleus. Only certain electron orbits are allowed and radius of the orbit increases square of n, where n is the principal quantum number. The first line of Balmer series is produced in the 3 to 2 transition. For hydrogen, z=1, this produces a photon of wavelength 656 nanometer.
Water is ___ transported into and out of the vacuoles in the guard cells.
Water is H2o
Covalent compound (O,H are nonmetals)
Valence of O (O must form an octet): 6
Valence of H: 1
Total valence electrons: 8
Molar mass: 18.02 g/mol
hope this helps good luck
Why is the human cardiovascular system considered closed?
Answer:
There are no holes for blood to enter or leave the system
What definition best describes polygenic traits?
Polygenic traits are controlled by two or more than two genes (usually by many different genes) at different loci on different chromosomes. These genes are described as polygenes . A polygene refers to a group of genes that when expressed together produce a particular phenotype or trait.
Answer:
letter b
Explanation:
The distance between Neptune and the Sun is 30.06 AU. What is this distance in millions of kilometers? (One AU is about 150 million kilometers.)
A.
450 million kilometers
B.
450.9 million kilometers
C.
4,000 million kilometers
D.
4,509 million kilometers
Answer:
4,509 million kilometers
Explanation: