Answer:
D. Thick stems and leaves were selected because succulents with these characteristics are more likely to survive hot, dry weather and, thus, produce more offspring
Explanation:
The succulents have not always been as they are now, but they have evolved from plants that looked different and existed in different weather conditions. As the environment has been changing, in order to survive, the succulents started to develop traits that would be advantageous for them to survive in the hot and dry weather. The succulents that started to develop such traits, like the thick stem and leaves were the ones selected to survive, as they were the ones that had the advantage in this type of environment. The thick stems and leaves enabled them to store as much water as possible when there is, and also to preserve it for long periods of time, while the succulents that didn't possessed this traits died out because they were not able to sustain the new conditions, nor to be able to reproduce effectively.
Earth's core has a temperature of about 6000 Kelvin. Earth's surface has a temperature near 300 Kelvin. The distance from the core to the crust is approximately 5.15 × 10^6 meters. The temperature gradient between the core and the crust is K/m. Express the answer as a decimal number rounded to three decimal places.
Temperature at Earth's core, TA = 6000 Kelvin
Temperature at Earth's surface, TB = 300 Kelvin
The given distance between the core to the crust, DX = 5.15 × 10^6 meters
So, the temperature gradient between the core and the crust
= (TB - TA)/DX
= (300K - 6000K)/5.15 * 10^6 m
= -5700K / 5.15 * 10^6 m
= −1.136 * 10^(-6) K/m
Answer in decimal form rounded to three decimal places
= -0.001 * 10^(-3) K/m
What is temperature gradient?
the rate of change of temperature with displacement in a given direction.
What is the formula of temperature gradient?
The temperature at point A is TA, the temperature at point B is TB, and the distance between the two points is DX. Then the temperature gradient is defined as (TB - TA) / DX.
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Final answer:
The temperature gradient between Earth's core and the crust, with a core temperature of about 6000 Kelvin and a crust temperature of 300 Kelvin over a distance of 5.15 × 10^6 meters, is approximately 1.097 K/m.
Explanation:
The student is asking to calculate the temperature gradient between Earth's core and the crust. To find the temperature gradient, we need to divide the difference in temperature by the distance over which the temperature change occurs. The core's temperature is about 6000 Kelvin, and the crust's temperature is near 300 Kelvin. The distance between the core and the crust is approximately 5.15 × 106 meters.
To calculate the gradient, we use the following steps:
Subtract the crust's temperature from the core's temperature: 6000 K - 300 K = 5700 K.
Divide the temperature difference by the distance: 5700 K / 5.15 × 106 m.
Perform the division to get the gradient and round to three decimal places: Gradient ≈ 1.097 K/m (rounded to three decimal places).
Can anybody help me with this? A single egg is a(n): It's not ovary. ovary ova ovum yolk
A gene that normally has the sequence CAGAGCCTATTAGGC is replicated as CAGAGCTTATTAGGC. Which of the following repair mechanisms would MOST likely be employed to fix this replication error?
A. nucleotide excision repair
B. DNA polymerase proofreading
C. None of the other answer options is correct.
D. mismatch repair
E. base excision repair
The repair mechanisms which would most likely be employed to fix this replication error is mismatch repair. Thus, the correct option is D.
What is Mismatch repair mechanism?DNA mismatch repair (MMR) is a highly conserved DNA repair mechanism pathway which plays a key role in maintaining genomic stability. The specificity of mismatch repair is primarily for the base-base mismatches and also for insertion/deletion mispair which are generated during DNA replication and recombination of chromosomes.
Most DNA mistakes are corrected during DNA replication, although when this does not happen, mismatch repair mechanism is employed. Mismatch repair enzymes recognize wrongly incorporated base pairs and excise it from the DNA, replacing it with the correct base. An example is the mismatch which involves the replacement of T in place of C.
Therefore, the correct option is D.
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Which of the following statements is true about the three processes that can occur
as sunlight enters into Earth's atmosphere as solar radiation?
The Earth's surface can only directly absorbs solar radiation.
b) The solar radiation can be absorbed by clouds and the atmosphere.
c) The solar radiation can be reflected by clouds and the atmosphere back into
space.
d) B and C only
e) All of the above
Answer:
b) The solar radiation can be absorbed by clouds and the atmosphere
Explanation:
The clouds consist of water vapour and the atmosphere consists of mixture of ai for example the carbon dioxide and methane. The water vapour and these two gases can all absorb sunlight. Reason for this is that the bonding pairs of electrons come from different atoms in the molecule and the bonds are distorted. Symmetrical molecules but with distorted bonds or bond electron pairs.
Thank you.
Answer:all of the above
Explanation:
To maintain a constant global temperature the sun's radiations eventually back to space. the 20% sun's radiation scattered and reflected by clouds, 19% radiation are absorbed by atmosphere and clouds, 6% scattered from atmosphere, 51% absorbed by earth and 4% reflected by earth's surface.
Please answer this question.. What structures are located inside the cell? A. Tissues B. Organelles C. Systems D. Organisms
Wind transports sand grains _____. mostly as a part of the suspended load with equal amounts in the air as in the bed load by siltation, as part of the bed load only during the most severe dust storms
Answer:
as in the bed load by siltation
Explanation:
Wind usually carry all heavy particles through Siltation. In this process, the sand is carried as a heap of sand for a small distance and mostly it stays close to the ground surface due to its weight.
However lighter particles like clay and silt are carried as suspension in air as they are light weighted and can remain suspended at greater heights for a long time.
Hence, the correct answer is "as in the bed load by siltation"
Wind mostly transports sand grains as a part of the suspended load, meaning they are lifted and carried by the wind. This is particularly common in desert regions where wind can form dunes by depositing the sand elsewhere.
Explanation:Wind transports sand grains mostly as a part of the suspended load. This means that sand grains are usually picked up by the wind and moved along in the air. The wind can lift and carry the sand grains over long distances especially in regions known as deserts. These sand grains may eventually be deposited elsewhere to form dunes in a process known as aeolian processes. However, during severe dust storms, much larger amounts of sand can be transported by wind in both the suspended load and the bed load.
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(Select all correct answers)
For a claim about the natural world to be considered scientific, what attributes must it have?
- It must be consistent with only a small portion of relevant observations or data.
- It must be based on scientific observations that can be repeated in a controlled setting.
- It must be open to modification if new evidence doesn't completely support it.
- It must be applicable to future events and occurrences.
Answer: It must be based on scientific observations that can be repeated in a controlled setting.
Explanation:
A scientific claim is the claim which includes statement(s) which is verified by the observations obtain after multiple experimental trials or procedures in a controlled experiment. A scientific claim can only be considered as wrong when a valid argument or prove satisfies the fact why it is wrong.
Answer:t must be based on scientific observations that can be repeated in a controlled setting.
Explanation:
What do the different colors of viable light represent A) kinda of pigments B)kinds of atoms C) shapes of photons D) wavelengths of energy
Answer:
D
Explanation:
when white light travels through a triangular prism, dispersion of light occurs due to the different speeds of the different colors
Why is a genetically diverse population more likely to survive a change to the
environment?
O
A. The population will have a higher allele frequency.
O
B. The population will have more possible adaptations.
O
C. The population will have fewer alleles.
O
D. The population will have a smaller gene pool.
SUSU
Hello!
The correct answer is B. The population will have more possible adaptations.
When a population is genetically diverse it is more likely to survive a change to the environment because it can easily adapt.
I hope that helps and isn't too late!
The population that will have more possible adaptations is more likely to survive a change (Option B).
What is evolution?Evolution refers to descendence with modification in the organisms, which happens especially due to natural selection.
Natural selection leads to the emergence of diverse phenotypes adapted to challenging conditions.Natural selection tends to favor adaptations to face different environmental factors.In conclusion, the population that will have more possible adaptations is more likely to survive a change (Option B).
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Learning that is not directly and immediately observable is called __________
DNA and RNA share a number of similarities,but they also differ in certain aspects of their structure. Wich nitrogenous base is found in RNA but is not found in DNA
Answer:
Uracil
Explanation:
Instead of Thymine, there's Uracil.
Which example best describes a reflex action?
A.
eating food when hungry
B.
coughing when the throat is irritated
C.
bending down to lift a heavy object
D.
going for a walk outside
Answer:
Which example best describes a reflex action?
A.
going for a walk outside
B.
eating food when hungry
C.
bending down to lift a heavy object
D.
coughing when the throat is irritated
the correct answer is D
Explanation:
coughing is a reflexive action that occurs when harmful irritants and dust particles enter.
Best describes a reflex action B. Coughing when the throat is irritated. Therefore , B. coughing when the throat is irritated is correct .
A reflex action is an involuntary, quick, and automatic response to a specific stimulus.
In this case, when the throat is irritated, the body responds by triggering a coughing reflex.
This reflex helps clear the irritant, such as dust or mucus, from the throat and airways to prevent potential harm.
It doesn't involve conscious thought or decision-making, making it a classic example of a reflex.
The other options:
A. Eating food when hungry is a voluntary action that is consciously initiated in response to hunger.
C. Bending down to lift a heavy object is a voluntary action that requires conscious thought and decision.
D. Going for a walk outside is also a voluntary action that one decides to do.
In summary, a reflex action, as in the case of coughing when the throat is irritated, occurs without conscious control and is an automatic response to a specific stimulus to protect the body from harm.
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Thick skin has a more extensive dermal layer than thin skin. thick skin has a more extensive dermal layer than thin skin.
a. True
b. False
Answer:
false
Explanation:
thin skin actually has more extensive dermal layer - this make thin skin easier to stitch while thick skin is found on fingertips & soles of the feet
Thick skin has a more extensive dermal layer than thin skin, making it better adapted to withstand more wear and tear.
Explanation:True
Thick skin, found on the palms of the hands and soles of the feet, has a more extensive dermal layer compared to thin skin. The dermal layer in thick skin is characterized by the presence of ridges and sweat glands, which help increase friction and improve gripping ability. On the other hand, thin skin, found on the rest of the body, has a thinner dermal layer with fewer sweat glands and no ridges.
In summary, thick skin indeed has a more extensive dermal layer compared to thin skin, making it better adapted to withstand more wear and tear.
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What compound provides the reducing power for the calvin cycle reactions?
The compound NADPH provides the reducing power for the Calvin cycle reactions in photosynthesis. It facilitates the conversion of the three-carbon compound, 3-PGA, into another similar compound called G3P. ATP in conjunction with NADPH helps in conversion of atmospheric carbon dioxide into carbohydrates.
Explanation:The compound that provides the reducing power for the Calvin cycle reactions is NADPH (Nicotinamide Adenine Dinucleotide Phosphate). During the Calvin cycle, NADPH uses its stored energy to convert the three-carbon compound, 3-PGA, into another three-carbon compound called G3P which is reduction reaction. In the various stages of the Calvin cycle namely fixation, reduction, and regeneration, NADPH plays a pivotal role in helping these reactions to proceed by providing the necessary electrons.
Easy to understand yet detailed example would be the energy input required for six turns of the Calvin cycle, this includes 12 ATP and 12 NADPH molecules in the reduction step and 6 additional ATP molecules in the regeneration step. This dataset explains how important NADPH is for the functioning of the Calvin cycle.
Another significant compound involved is ATP. Together ATP and NADPH convert carbon dioxide from the atmosphere into carbohydrates using their energy and reducing power.
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Put the following steps of the convection process in the correct order.
1. Gravity pulls cooler matter downward.
2. The matter expands and decreases in density.
3. An up-and-down flow of matter produces a convection current.
4. Matter is heated.
5. Warmed matter is forced upward.
Question 2 options:
a)
4, 2, 5, 1, 3
b)
2, 4, 3, 1, 5
c)
3, 2, 5, 4, 1
d)
1, 4, 2, 5, 3
Answer: Option (A)
Explanation:
At the initial stage, the heat produced from the earth's core heats up the matter present in the lower mantle and due to this continuous heating the matter gets expand and looses its density, thereby forces the matter to move upward.
This warmer matters then rises up and temperature decreases, as a result of which the magma/matter becomes denser and again falls back under the action of gravity.
This continuous process is called the convection current.
Hence the correct option is (A)
The steps in the convection process follow the order of 4, 2, 5, 1, 3, representing heating of matter, its expansion and decrease in density, upwards movement, then downwards due to gravity, and finally forming convection currents.
Explanation:The correct order of the steps in the convection process is given by option (a) 4, 2, 5, 1, 3. This corresponds to the following sequence: first, matter is heated increasing its energy (4). As a result, it expands leading to a decrease in its density (2). Because of the reduced density, the warmed matter is forced upward (5). As it rises, it cools down, and its density increases, which allows gravity to pull it downward (1). This creates an up-and-down flow known as a convection current (3).
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Using the graph, determine the half-life of thorium-232.
Question 12 options:
7 billion years
14 billion years
28 billion years
35 billion years
Answer:
14 billion years
Explanation:
Because the percentage of parent isotope remaining decreases by 50% at 14 billion years.
Thorium is used as an alloying agent to enhance magnesium strength at high temperatures. It is also used to coat tungsten filaments which is used in electronic devices for example television sets. Thus, the correct option is B.
What are the other forms of thorium?When thorium is bombarded with neutrons, thorium-232 transformed into thorium-233, which due course decays into uranium-233 through a series of beta decays. Uranium-233 is a fissionable and can be used as a nuclear fuel.
Because the percentage of parent isotope of thorium remaining reduced by 50% at 14 billion years.
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Eukaryotes have a nucleus, and prokaryotes have a nucleoid.
True or False
Answer:
true
Explanation:
thats whats eukaryotes
Answer:
the statement is true.
Which statement most accurately describes smooth ER?
A.
Series of membrane-enclosed sacs that detoxify substances and synthesize lipids and carbohydrates
B.
Stack of flattened sacs that modify and sort proteins
C.
Contain(s) digestive enzymes
D.
Series of membrane-enclosed sacs with ribosomes on the surface
Answer:
I just need the points
Explanation:
Ya thats right!!!
Series of membrane-enclosed sacs that detoxify substances and synthesize lipids and carbohydrates - this statement most accurately describes smooth ER.
What is smooth ER?The smooth endoplasmic reticulum, or smooth ER, is an organelle found in both animal cells and plant cells. An organelle is a sub-unit within a cell that has a specialized function. The main function of the smooth ER is to make cellular products like hormones and lipids.
The smooth ER is involved in the synthesis of lipids, including cholesterol and phospholipids, which are used in the production of new cellular membrane. Organelle, any of the specialized structures within a cell that perform a specific function.
The interior of the smooth ER is called the lumen, which is enclosed by a phospholipid membrane, just like the membrane that encloses the entire cell. The number of smooth ER units in a cell depends on the type of cell and what its manufacturing needs are.
The correct answer is option A.
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When Mendel crossed true–breeding pea plants that have inflated pods (PP) with those that have constricted pods (pp), it was observed that F1 offspring had a genotype of Pp. What would their phenotype be?
Answer:
constricted pods
Explanation:
the genotype would have the dominant phenotype with PP even though the recessive is included. The recessive is controlled or taken over by the dominant allele.
Answer:
What are the two phases of speciation?
(A) geographic isolation and variation
(B) adaptation and reproductive isolation
(C) adaptation and variation
(D) geographic isolation and reproductive isolation
ANSWER (D) geographic isolation and reproductive isolation
Explanation:
What force draws the matter in an interstellar cloud together to form a star?
Question 4 options:
electric
gravity
magnetism
friction
Answer:
Gravity draws the matter in an interstellar cloud together to form a star.
Answer:
Option B, Gravity
Explanation:
Due to gravity, the matter with in the interstellar cloud collate together to form star.
A star form when the interstellar gas or dust (molecular dust) comes closer to form dense part under the influence of their own gravity. The core of a gas cloud is dense and hence it collapse first to form clump and then the outer gas collide to form more clumps. These clumps then get collate and get converted into protostars and later turn into fully developed star.
Hence, option B is correct
8. What's the waste product of electrons and pyruvate combining in fermentation? A. Sulfuric acid B. Oxalic acid C. Citric acid D. Lactic acid
Answer:
Lactic acid
Explanation:
Fermentation may be defined as the breakdown of glucose molecule in the limited supply of oxygen with the help of microorganisms.
Pyruvate molecules and electrons waste product combine together in fermentation to yield lactic acid and two molecules of ATP. The transfer of electron from NADH to pyruvate molecule generates the lactic acid.
Thus, the correct answer is option (D).
Answer:
D. Lactic acid
Explanation:
(Drag each tile to the correct location.)
Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both.
- A tentative
statement used to
guide scientific
investigations.
- Makes predictions
about future
events.
- Can be tested by
many independent
researchers.
- Based on
observations of
natural phenomena.
- A well-established,
highly reliable
explanation.
The terms can be categorized as follows: a tentative statement to guide research is a scientific hypothesis, making predictions about future events and being testable by independent researchers as well as based on natural phenomena are common to both a scientific theory and hypothesis, while a well-established and reliable explanation is a characteristic of a scientific theory.
Explanation:Categorizing each term based on if it is typical of a scientific theory, a scientific hypothesis, or both:
A tentative statement used to guide scientific investigations - This is typical of a scientific hypothesis.Makes predictions about future events - This is typical of both, a scientific theory and a hypothesis.Can be tested by many independent researchers - This is also typical of both, a scientific theory and a hypothesis.Based on observations of natural phenomena - This is also typical of both, a scientific theory and a hypothesis.A well-established, highly reliable explanation - This is typical of a scientific theory.Learn more about Scientific Theory and Hypothesis here:https://brainly.com/question/37190252
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Term Scientific hypothesis Scientific theory Both
A tentative statement used to guide scientific investigations. Yes Yes Yes
Makes predictions about future events. Yes Yes Yes
Can be tested by many independent researchers. Yes Yes Yes
Based on observations of natural phenomena. Yes Yes Yes
A well-established, highly reliable explanation. No Yes No
Here is a more detailed explanation of each term:
A tentative statement used to guide scientific investigations. This is a description of both scientific theories and scientific hypotheses.
Both theories and hypotheses are statements about the natural world, but they differ in their level of support.
Theories are well-established and highly reliable, while hypotheses are tentative and need to be tested.
Makes predictions about future events. Both scientific theories and scientific hypotheses can be used to make predictions about future events. For example, the theory of gravity predicts that objects will fall to the ground if they are dropped.
The hypothesis that increasing the amount of fertilizer given to plants will make them grow taller can also be used to make a prediction:
if we increase the amount of fertilizer given to a plant, we predict that it will grow taller than a plant that is not given any fertilizer.
Can be tested by many independent researchers. Both scientific theories and scientific hypotheses can be tested by many independent researchers.
This is an important part of the scientific process, as it helps to ensure that the results of experiments are reliable and reproducible.
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Biological, it is very important that liquid water is ______ dense than frozen water
Answer:
less dense than frozen water..
Explanation:
frozen h2o is heavier, weighs more...
why does carbon bond well with itself and make a stable compound?
A.the number of electrons present in carbon
B.carbon only bonds with other carbon atoms
C.carbon does not easily bond with itself
Answer:
B. carbon only bonds with other carbon atoms
Explanation:
A carbon bonds well with itself and make a stable compound because it only bonds with other carbon atoms.
An earthworm lives and reproduce is in the soil it aerates the soil and adds organic material to it the earthworm is a source of food for other organisms all of these statements together best describe
Answer:
Decomposer.
Explanation:
Embryology provides evidence for evolution because
A. studying organisms during their early development provides clues as to how the adult functions.
B. studying organisms during their early development gives insights as to the organism's diet and how it has changed over many generations.
C. during their development, embryos experience genetic mutations, some of which allow the embryo a better chance of survival.
D. during their development, many organisms look similar, suggesting that very different organisms may have a common ancestor
Answer:
Option (D).
Explanation:
Embryology may be defined as the branch of biology that mainly deals with the study and development of embryo. Embryological evidence is helpful to explain the evolutionary history of the organisms.
Embryo structure of different organisms looks similar and contains structure like tails and gill slits. The different organisms share a similar developmental and structural organisation at embryo level.
Thus, the correct answer is option (D).
The scientific term for chewing food is
a. micturition
b. mightymorphin
c. mastication
d. inelatonin
the answer is c. mastication
The scientific term for chewing food is mastication.
Option C
Explanation:
The food splits into the smaller pieces during mastication. As the food is broken down its surface area increases as the size decreases due to which many other enzymes can also act on the masticated food. Mixing of enzymes occur both during mastication and after mastication the food is passed down through oesophagus into the stomach where other enzymes and acids are mixed to breakdown the food into further smaller molecules.
Explain three primary ways in which organisms depend on each other (symbiotic relationships)
what is the tern used to describe an individual that of a recessive allele that causes disease,but is otherwise healthy?
A.carrier
B.polycite
C.target
D.afflicted
The term for an individual who carries a recessive allele causing a disease but is otherwise healthy is a) 'carrier'. They do not show symptoms but can pass the allele to their offspring. Examples include sickle cell anemia and cystic fibrosis.
The term used to describe an individual who carries a recessive allele that causes disease but is otherwise healthy is a) carrier. Recessive alleles, such as those for cystic fibrosis, cause the disease only when an individual inherits two copies. Those who inherit just one copy are carriers and can pass it to the next generation.
Carrier: An individual who has one copy of a recessive allele that can cause a disease but does not show symptoms of the disease. They can pass this allele to their offspring.Polycite: This is not a standard biological term related to genetics.Target: This generally refers to the focus of an action or goal, not used in genetics in this context.Afflicted: This refers to someone who is suffering from a disease or condition, which is not the case here.For example, a person who has one copy of the sickle cell anemia allele (heterozygous) is a carrier. They can pass the allele to their children, but they do not suffer from the disease themselves.
A wombat is a marsupial native to which country?
Answer:
Australia
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