Answer:
Pretty sure it's A because people can redo this test as many times as needed to verify the answer.
Answer:
D. All living organisms are composed of one or more cells, which came from pre-existing cells.
Explanation:
took the test on
Identify the graph that best represents a population to gree exponentially until it’s carrying capacity was met
Where’s the graph? Lemme know?
Graph C.
That goes up and then stops in the middle going in a straight line.
Summarize the two stages of cellular respiration
Answer:
It is actually 3 stages, three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate.
Explanation:
Which of these best describes genetic drift?
A) The movement of alleles between population
B) Random fluctuations in the gene frequencies within a population
C) A planned method to reduce the number of inferior genes in a population
D) The combining of alleles to create more genetic variations within a population
it's b ramdom fluctions in the gene fequinces within a poplation
Answer:
B) Random fluctuations in the gene frequencies within a population
Explanation:
Genetic drift is one of the evolutionary process that deviated the population from Hardy–Weinberg equilibrium. Genetic drift refers to the change in the allele frequency of population due to chance event alone. It does not include natural selection or gene transfer. It brings out random change in allele frequency in the population. Genetic drift is more effective in a small breeding population.
Fossils are most commonly found in _______ rock.
A.
igneous
B.
paleolithic
C.
metamorphic
D.
sedimentary
Answer:
The answer is Sedimentary
Explanation:
With time and pressure, these sediments, such as sand, plant debris, or ash, become compressed into rock. Therefore, fossils are found in sedimentary rock, like sandstone, shale, limestone and coal
The two waves in the diagram are occupying the same place at the same time
Answer: by adding the amplitude of the two waves
Explanation:
The question pertains to wave superposition in Physics, demonstrating constructive interference and standing waves when two identical waves intersect in opposite directions, leading to an increase in amplitude and fixed points of no motion (nodes) and maximum motion (antinodes).
The question deals with the concept of wave superposition in Physics, specifically the phenomena known as constructive interference and standing waves, which occur when two waves occupy the same place at the same time.
When two identical waves traveling in opposite directions intersect, they can add up at the same points in space, leading to an increase in amplitude. This process is called constructive interference, resulting in wave patterns called standing waves, characterized by their nodes—points where the amplitude is always zero—and antinodes—points of maximum amplitude. The figures mentioned in the question demonstrate these phenomena. For example, Figure 16.33 illustrates pure constructive interference where the amplitude of the resulting wave is twice that of the individual waves due to their perfect alignment in phase, whereas Figures like 12.1.1 and 5.6.5 show standing wave patterns resulting from the superposition.
What is true of all body cells except sex cells?
Each body cell contains the same number and kinds of chromosome for that organism. The chromosomes contain the same number and kinds of genes for that individual.
Answer:
the answer is b) Each body cell contains the same number and kinds of chromosome for that organism. The chromosomes contain the same number and kinds of genes for that individual.
Explanation:
As explained earlier, all cells except sex cells are known as somatic cells of the body. This means, a broader definition of the cells is non-sex cells. The human body contains 46 individual chromosomes. These chromosomes are divided into 23 pairs of chromosomes.
Important roles of bacteria include _____.
decomposition
significance in commercial products such as cheese and yogurt
sewage disposal
nitrogen fixation
the answer is decomposition.
Answer:
A. decomposition
B. significance in commercial products such as cheese and yogurt
C. sewage disposal
D. nitrogen fixation
Explanation:
took the test and got 100
What is one way people have negatively affected land resources?
Answer:
We use too much of some of the land resources that we are running out.
Explanation:
People are using up oil which is a non renewable resource. It will run out at a certain point.
the endosymbiotic theory evolution states that organelles is eukaryotic cells are derived from bacteria which statement is the strongest evidence in support of the endosymbiotic theory of eukaryotic evolution?
A. Eukaryote organelles are similar in size and shape to bacteria
B. Eukaryote organelles stop functioning outside of a plant cell
C. Eukaryote organelles can reproduce through sexual reproduction
D. Eukaryote organelles contain DNA similar to bacterial DNA
Answer:
D, eukaryote organelles contain dna similiar to bacterial dna
Explanation:
The strongest evidence in support of the endosymbiotic theory of eukaryotic evolution is that eukaryote organelles contain DNA similar to bacterial DNA. This is observed in the case of mitochondria and chloroplasts, which have their own DNA that is similar to bacterial DNA. This suggests that these organelles were once free-living bacteria that were engulfed by larger cells and became symbiotic.
Explanation:The strongest evidence in support of the endosymbiotic theory of eukaryotic evolution is that eukaryote organelles contain DNA similar to bacterial DNA. This is observed in the case of mitochondria and chloroplasts, which have their own DNA that is similar to bacterial DNA. This suggests that these organelles were once free-living bacteria that were engulfed by larger cells and became symbiotic.
Furthermore, these organelles also have their own ribosomes, which are similar to bacterial ribosomes, and they divide independently within the cell, just like bacteria. These characteristics further support the idea that mitochondria and chloroplasts were originally bacterial cells that became integrated into eukaryotic cells.
Although other options mentioned in the question are true to some extent, the presence of bacterial DNA in eukaryote organelles is the most compelling evidence for the endosymbiotic theory.
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When seeds germinate the shoot automatically grows up out of the soil and
the roots automatically grown down into the soil. The upward growth of the
shoot is due to
Check all that apply.
A) positive gravitropism.
B) negative gravitropism.
C) positive phototropism.
D) neutral phototropism.
Answer: The shoot grows up towards the sunlight is Positive Phototropism
The root grows down the soil is Positively Geotropism / positive gravitropism.
happy to help again :)
Answer:
The correct answer is option B (negative gravitropism) and option C (positive phototropism).
Explanation:
Plant seedlings shows downward growth of roots and upward growth of stems due to response of plants to external environmental stimulus via a phenomemon known as tropism.
Plant tropisms are the result of differential growth as cells in area of stem or root grows more quickly than cells in opposite area.this growth determines the directional growth of the entire plants. The directional growth of an organism in response to light is known as Phototropism while directional growth of an organism in response to gravity is known as gravitropism.
Shoot growth in plants shows negative geotropism because they grow away from that force or in opposite direction of the gravity. Also, plants shows positive phototropism as they respond in direction of light.
Thus, option B (negative gravitropism) and option C (positive phototropism) are the right answer.
From a classification standpoint, which of these organisms is LEAST like the other three?
A)alligatorB)crabC)frogD)whale
Answer:
B) crab is the correct answer
Explanation:
i got it right on usatestprep! hope this helped
From a classification standpoint, the crab organism is least like the other three. This is because all the given organisms are either amphibians or reptiles, but crabs are crustaceans.
What do you mean by Classification?Classification may be defined as an ordered set of related categories used to group data according to its similarities.
Crabs are crustaceans which are semi-aquatic creatures that have an exoskeleton, but alligators, frogs, and whales belong either to reptiles or amphibians.
Therefore, from a classification standpoint, the crab organism is least like the other three.
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DO ANIMAL CELLS HAVE WALLS
Answer:
NO
Explanation:
Answer:
No
Explanation:
Only plant cells do
Which technology is used to adjust the load connected to solar cells and increase their energy output?
A. Direct current
B. Alternating current
C. Maximum power point tracking
D. Electromagnetic induction
Answer:
C. Maximum power point tracking.
Explanation:
A. Direct current: It is also called DC in which electric current flows consistently in one direction.It is used in batteries and cells.It is not used in solar system .Therefore, it is false.
B. Alternating current : It is also called AC . The AC is used in domestic electricity.The current in which direction of electron is reversed after at regular intervals .It is not used for solar cells.Hence, it is false.
C. Maximum power point tracking:It is also called power point tracking. It is used in charge control in solar cells.it is a technique which is used to extracting maximum available power from PV ( photovoltaic cells) solar system.It is a technique that is used to adjust load connected to solar cells and increase their energy output.Therefore, it is true.
D. Electromagnetic induction:It is a process for producing EMF due to change in magnetic field. It is not used in solar system. Therefore, it is false.
Answer:C. Maximum power point tracking.
17.
After photons strike the light absorbing pigment chlorophyll, which of the following occurs
first?
O
Electrons in water get released during photolysis
O
Electrons are transported into the electron transport ch
O
ATP is transformed into glucose.
Electrons in chlorophyll become excited.
:)))
Answer:
Electrons become excited
Explanation:
After photons strike the light-absorbing pigment chlorophyll, electrons within the chlorophyll become increasingly excited. Only after this initial excitation do the electrons begin getting transported into the electron transport chain. Electrons in water molecules get released during photolysis, but only after they first become excited. ATP isn’t transformed into glucose until the light-independent stages of photosynthesis.
After photons strike the light absorbing pigment chlorophyll, the electron in that molecule becomes excited. The correct option is D.
What is chlorophyll?Chlorophyll is the term coined to the green pigment used by plants to produce food throughout the photosynthesis process.
Chloroplasts are plant cell organelles that use photosynthetic energy to revert light energy into fairly stable chemical energy.
They endure life on Earth while doing so. Chloroplasts also perform a variety of metabolic functions for plant cells, such as the metabolism of fats and membrane lipids.
Chlorophyll is excited and emits electrons when it absorbs light. These chlorophylls are discovered in photosynthetic units known as Photosystems I and II.
Each unit has a distinct reaction center containing pigment molecules. These molecules absorb different wavelengths of light and emit electrons.
Thus, the correct option is D.
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which of the following joins two pieces of DNA together
DNA ligase is a DNA- joining enzyme. if two pieces of DNA Has matching ends, ligase can link them to form from a single, unbroken molecule of DNA. in DNA cloning, restriction enzymes and DNA ligase are used to insert genes and other pieces of DNA plasmids.
DNA Ligase joins two pieces of DNA together
What is DNA ligase ?DNA ligase is a DNA-joining enzyme.If two pieces of DNA have matching ends, ligase can link them to form a single, unbroken molecule of DNA.As synthesis proceeds, an enzyme removes the RNA primer, which is then replaced with DNA nucleotides, and the gaps between fragments are sealed by an enzyme called DNA ligase.Learn more about DNA Ligase here:
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Label each organism in the food web as a producer, consumer, or decomposer. Hope u can help.
Hi, The center image is a decomposer because it decomposes the dead organisms. The grass is a producer since it produces its own energy through photosynthesis. The rest are consumers because they consume other organisms to get energy. Hope that helped!
The grass is the producer, the grasshopper, rabbit, two birds, and the wolf are the consumers, and the fungus in the middle is the decomposer, as it decomposes everything after death.
What is the significance of the producer and the consumer in the food web?In the food web, there are producers, like the green grass that is depicted here, that produce foods with the help of photosynthesis, which are later taken by consumers like the rabbit and the grasshopper. After the consumer and producer have died, all of these are decomposed by the fungi that are centrally present in order to maintain the nutrient cycle.
Hence, the grass is the producer, the grasshopper, rabbit, two birds, and the wolf are the consumers, and the fungus in the middle is the decomposer, as it decomposes everything after death.
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A cell requires a constant energy supply to
perform basic life functions. Which two organelles
are primarily responsible for energy transforma-
tions in the cell?
A nucleus and ribosome
B lysosome and vacuole
C mitochondrion and chloroplast
D endoplasmic reticulum and Golgi apparatus
Which weighs more: a pound of feathers or a pound of lead? Explain.
A pound of feathers and a pound of lead, both weigh the same.
How is one pound of lead equal to one pound of feathers?One pound is always equal to a pound irrespective of the material. This concept literally holds good on any material such as iron, cotton, steel, etc
People may wonder that feather is very much less dense than lead.But to equate lead to feather, more quantity of feather may be required but ultimately it also reaches a point where it will way a pound.So, when the weight of feather and weight of lead is compared on a weighing scale, they will way the same.To learn more about weight as a physical quantity, refer:
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The reproductive organs of gymnosperms are found in _____.
ovaries
seeds
cones
pollen
Answer:
Cones is the correct answer because cone is the female reproductive part
Answer:
Option C, Cones
Explanation:
In Gymnosperm, male microspore and female megaspores are generated in sporangia which are carried by cones/strobili.
Strobili consists of a short stem with leaves known as sporophyll on which sporangia is found. The sporangia producing the male microspore and female megaspore are found on separate cones. The male cone is known as staminate cone and the female cone is known as ovulate cone.
Thus, option C is the correct answer
what is the difference between adaptation and adapting
Answer:
Adaptation is the process of changing form or habits for survival, while adapting is the process of doing such a thing.
Explanation:
Answer:
Explanation:
Adaptation is a process of changes that occur in an organism like in morphology, physiology and genetically which enable it to survive in harsh environmental conditions. This occurs in due course of evolution and natural selection.
When organism adapt according to the surrounding envoronment this can be said that the organism is adapting.
Complete these sentences by Matching the phrases.
Answer:
The Doppler effect- 3
Comic Microwave Background Radiation- 4
Particle Accelerators- 1
The Big Bang Theory- 2
Explanation:
Answer:
Explanation:
1). Scientists recreate early conditions of the universe using
Particle accelerates.
2). The prevailing idea about the beginning of the universe is called as
The Big Bang theory.
3). The speed of stars can be measured using
the Doppler's effect.
4). The heat left over from the beginning of the universe is
Cosmic microwave background radiation.
VY Canis Majoris is located in the constellation Canus Minor.
True
False
false because it is located in major not minor
The answer would be false
A single pair of goldfish in a aquarium produced a large number of offspring.
These offspring showed variations in body shape and coloration.
The most likely explanation for these variations is what?
(A.) Offspring were adapting to different environments.
(B.) Parent fish had not been exposed to mutagenic agents.
(C.) Offspring were produced from different combinations of genes.
Answer:
C. Offspring were produced from different combinations of genes.
Explanation:
The offspring would not be adapting to different environments as they all live in the same aquarium. There is no mention of mutagenic agents present in the aquarium and that would have had more of an effect on the parents and not the offspring. The parents may have had different sets of alleles which could produce a variety of phenotypes of their offspring.
A heterozygous round pea plant is crossed with a homozygous round pea plant.what percentage of the offspring will be be homozygous?
Answer:
50%
Explanation:
There are only 2 possibilities 2 dominant genes (homozygous) or 1 dominant gene and 1 recessive gene (heterozygous) it's a 2/4 chance for each making it 50/50.
Answer: 50%
Explanation: Homozygous: YY or yy
Heterozygous: Yy
YY, YY
yY, yY
Yy, Yy
yy, yy
As you can see, in both cases it would be 50/50 chances of being either heterozygous or homozygous.
Where does population size and population with logistic growth
Answer:
At the carrying capacity
PLS ANSWER THESE QUESTIONS WILL MARK BRAINLIEST
Answer:
Explanation:
This is process of mitosis in which there are 4 process simply called PMAT or prophase metaphase anaphase and telaphase
how many elements in nature are there and what are they
Well there's Water, Earth, Fire, and Air. Not quite sure how this would be a school question. But here it is.
Is a waste product that uses the most energy to produce
A waste product is a product that is made but isn’t necessarily needed eg. A lightbulb will make light energy but it also makes a waste product heat.
Waste products are nitrogenous wastes excreted from the metabolic processes. Uric acid is a waste product that uses maximum energy to produce. Thus, option B is correct.
What are nitrogenous wastes?Nitrogenous wastes are nitrogen-based products eliminated from the body in various forms like ammonia, urea, and uric acid. Ammonia has one nitrogen and is very toxic.
Urea has two nitrogen and is less toxic. On the other hand, uric acid has four nitrogens and complex molecules although is non-toxic but requires the maximum amount of energy to eliminate four nitrogen.
Therefore, uric acid needs maximum energy.
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The complete question is attached to the image below.
What happens to the energy stored in the biomass of an organism when it dies?
Answer:
The energy is recycled
Explanation:
This energy is taken by decomposers such as bacteria and fungi and scavengers such as vultures. The biomass is converted to other biomolecules/biomass by these organisms. However, the process is not 100% efficient. Some of the energy is lost as heat.
Select the best answer for the question.
8. What is the role of the enzyme primase in DNA replication?
A. Primase relaxes the DNA double helix so that other enzymes can
reach the DNA.
B. Primase initializes replication by building short RNA primers
complementary to the template.
C. Primase is the enzyme that connects the ribosome to the DNA.
D. Primase seals any gaps between Okazaki fragments or other
fragments of DNA.
The correct answer is B.
Answer:
The correct answer will be option B (Making short RNA primers)
Explanation:
Primase is a RNA Polymerase enzyme involved in the replication of DNA in organisms. for e.g- Dna-G (Prokaryotes) or AEP (Archaeo-Eukaryote Primase).
Role of primase in replication
1.Primase enzymes are activated by Helicase and form primosome complex.
2. Primase then synthesizes primers- short RNA molecules from ss-template DNA of 4-15 nucleotides long.
3.These primers are recognised by the enzyme DNA polymerase which adds and elonagte by adding nucleotides to the primer.
thus, option B is correct.