Which of the following is a likely explanation for the change in oxygen concentration in response to the time of day?
A.) Most organisms increase the rate of respiration at night.
B.) Organisms are performing photosynthesis during the day and cellular respiration at night.
C.) The oxygen produced by photosynthesis during the day is greater than the amount of oxygen used for respiration.
Answers
Answer:
C.) The oxygen produced by photosynthesis during the day is greater than the amount of oxygen used for respiration.
Explanation:
Oxygen concentration decreases at night.Concentrations of oxygen can decrease significantly during the night, due to respiration. DO concentrations are usually highest in the late afternoon, because photosynthesis has been occurring all day.
Related Questions
An energy pyramid shows the amount of available at each feeding level in an ecosystem.
Answers
Answer:
An energy pyramid is a diagram that compares the energy used by producers, primary consumers, and other trophic levels. In other words, an energy pyramid shows how much energy is available at each trophic level. Energy is lost at each trophic level of a food chain.
Answer:
its energy
Explanation:
took the quiz
In general, do organisms that have more traits in common also share more genes?
Answers
Answer:
In general, organisms that share similar physical features and genomes tend to be more closely related than those that do not. Such features that overlap both morphologically (in form) and genetically are referred to as homologous structures; they stem from developmental similarities that are based on evolution.
Explanation:
hope it helps!
Which type of base is shown? How can you tell?
Answers
Answer:
The correct answer is - purine nitrogenous base (adenine).
Explanation:
The base given in the diagram in the image has two rings attach with the pentose sugar which is attached to the phosphate, which means it is the diagram of nucleotide. In this nucleotide base can be either purine or pyrimidine.
Pyrimidines have a single ring structure, whereas purines have 2 ring structures. Adenine and guanine are purines with two ring structures whereas cytosine and thymine are pyrimidines as they have one ring structure. Adenine contains an amine group on C6, and a double bond between N1 and C6.
Protein kinase A (PKA) is: A) activated by covalent binding of cyclic AMP. B) affected by cyclic AMP only under unusual circumstances. C) allosterically activated by cyclic AMP. D) competitively inhibited by cyclic AMP. E) noncompetitively inhibited by cyclic AMP.
Answers
Answer:
The correct answer is C.
Explanation:
Protein kinase A (PKA) is one of these proteins for which cAMP is an allosteric activator that binds to the corresponding regulatory center in the enzyme, inducing dissociation of regulatory and catalytic subunits; The latter are thus arranged for the binding of the corresponding substrate proteins, which it phosphorylates at the expense of ATP and consequently modifies their activity. The phosphorylation and activation of glycogen phosphorylase depends on glycogen phosphorylase kinase, the latter enzyme that is a substrate for PKA.
what process is used by the cell to move the molecules from outside the cell to inside the cell
Answers
Answer:
Diffusion
Explanation:
Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.
(URGENT) Which of these statements is correct about the ocean waves? (100 points)
A) Wave 1 and Wave 2 have the same wavelength.
B) Wave 2 and Wave 3 have the same wavelength.
C) Wave 1 and Wave 2 have the same amplitude.
D) Wave 2 and Wave 3 have the same amplitude
Answers
Answer:
D
Explanation:
Wave 2 and Wave 3 have the same amplitude.
What type of system is required to maintain the amount of sugar in the blood at a certain level, making sure it does not rise too high or fall too low?
A.one negative and one positive feedback loop
B.two positive feedback loops
C.one negative feedback loop
D.two negative feedback loops
Answers
Answer:
Explanation:
C. one negative feedback loop
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Lesson 13 Review Questions Directions: Answer each of the following questions. 1. List five traits that are shared by all mammals, including the two traits that are used to define the mammal class. 2. Describe how mammals stay warm. 3. What is the function of sweating? 4. What are alveoli? What is their function? 5. What are the functions of the uterus and vagina in therian mammals? 6. What is the placenta? What is its role? 7. Where does a marsupial embryo develop? How is it nourished? 8. Describe eggs and egg laying in monotremes. 9. How does lactation differ in monotremes and therian mammals? 10. What were the synapsids? When were they most widespread? 11. Identify the therapsids. How were they related to mammals? 12. Outline the evolution of monotreme, marsupial, and placental mammals.
Answers
They are one of the three groups of living mammals, along with placentals and marsupials..
What human trait is shared by all mammals?All mammals (including humans) have the same distinctive features. These include: fur or hair growing from the skin. mammary glands that, in females, produce milk for feeding the young.Mammals conserve body heat with their hair or fur. It traps a layer of warm air next to the skin.Mammals and birds produce their own body heat and control their body temperatures. This process is known as endothermy, or warm-bloodedness, and it may be one of the reasons why mammals tend to dominate almost every global ecosystem.Its main function is to control body temperature. As the water in the sweat evaporates, the surface of the skin cools. An additional function of sweat is to help with gripping, by slightly moistening the palms.Muscular contractions of the uterus push the offspring out during birth. The vagina is a tubular passageway through which the embryo or fetus leaves the mother's body.Marsupials give birth to a tiny, immature embryo. The embryo then continues to grow and develop in a pouch on the mother's belly. Marsupial development is less risky for the mother. However, the embryo is fragile, so it may be less likely to survive than the fetus of a placental mammal.To learn more about mammals refer to:
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why bone grow in bidirectional
Answers
Explanation:
Bones grow in different directions because they need to support the body in different ways. The different directions allow for flexibility and strength.
Check all that are true of the following scenario.
An archer strings an arrow on a bow and draws the string back. Aiming the bow
upwards at a 45 degree angle, the archer pauses with arms locked into position and
then releases the string. The arrow flies upwards making an arc and then sticks into
the trunk of a tree with an audible thud.
At least four different types of energy are illustrated in this example.
The first energy transformation in the scenario is chemical energy to kinetic.
From the time the archer draws the bow until the thud us heard, entropy increases in
the universe.
The energy of the arrow at the end of the scenario is equal to the energy exerted by the
muscles of the archer.
When the arrow sticks into the tree the original energy has all been used up.
Answers
Statements 1 and 3 are true, while statements 2 and 4 are false.The first energy transformation in the scenario is chemical energy to kinetic. - True.
The archer converts chemical energy stored in their muscles into kinetic energy when they release the string and propel the arrow forward.From the time the archer draws the bow until the thud is heard, entropy increases in the universe. - False. Entropy is a measure of disorder or randomness in a system. In this scenario, the archer's actions do not necessarily lead to an increase in entropy.
The energy of the arrow at the end of the scenario is equal to the energy exerted by the muscles of the archer. - False. Energy is conserved in a closed system, but some energy is lost as heat and sound during the process. Therefore, the energy of the arrow at the end may be less than the energy exerted by the archer's muscles.
When the arrow sticks into the tree, the original energy has all been used up. - False. Energy is not created or destroyed but rather transformed from one form to another. Some of the initial energy from the archer's muscles is transferred to the arrow's kinetic energy, but it is not entirely used up.In summary, statements 1 and 3 are true, while statements 2 and 4 are false.
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Below is a photo of a particular kind of organism.
Based on its structure, this organism is most likely to be a___.
A. multicellular eukaryote
B. unicellular eukaryote
C. prokaryote
D. virus
Answers
Answer: C. Prokaryote
it looks the same
PLEASE HELP ME FAST!
Of the many functions of the skeletal system, which is directly helpful to the circulatory system?
A. stores calcium and phosphorus
B. provides an attacment point for muscles
C. produces blood cells
D. provides shape and support for the body
E. protects internal organs
Answers
Answer:
c
Explanation:
You are sitting in a go-cart that is not moving. John then pushed the cart and it moved. What caused the go-cart to be still? Why did John’s push cause the cart to move?
Answers
Potential Energy
When it’s not moving it’s potential energy but when it’s moving it’s kinetic energy
CAN SOMEONE PLEASE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST THANK YOU
Answers
Answer: C
Explanation:
makes sense
Early in genetic research, it was suggested that the genetic code might be made up of overlapping codons in which the last two bases of one codon make up the first two bases of the next codon, as below:
mRNA codons
overlapping code GGUAUA 1st codon = GGU
2nd codon = GUA
nonoverlapping code GGUAUA 1st codon = GGU
2nd codon = AUA
Supposing it were discovered that, in a life-form from another planet, even a single base pair substitution in the DNA caused three adjacent amino acid changes in the protein coded for. Would you conclude that the code was overlapping or nonoverlapping? Explain your logic.
Answers
The genetic code is called non-overlapping because adjacent codons can not overlap, whereas in this case, the code is overlapping.
What does 'overlapping code' mean?The genetic code does not overlap because the same nucleotide in the sequence cannot be used to encode two different codons.
In genetics, overlapping refers to a feature of the genetic code associated with how this nucleotide code is read.
In conclusion, the genetic code in this case is overlapping.
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What is TRUE about intrinsic motivation?
Performance incentives are an example of intrinsic motivation.
Only people with aptitudes are inspired by a sense of pride.
People feel satisfaction from having completed a behavior.
Bonuses, awards, and trophies all serve as intrinsic motivators.
Answers
Answer:
People feel satisfaction from having completed a behavior
A postsynaptic neuron has an RMP of -70mV and a typical threshold of -55mV. It has three presynaptic inputs-from neurons X, Y, and Z. Stimulation of
neuron X causes the postsynaptic neuron to depolarize by 0.5 mV. When X and Y are stimulated simultaneously, the postsynaptic neuron depolarizes by
1 mV, If X fires 10 times and Y fires 10 times the result will be …
Multiple Choice
a subthreshold summation.
presynaptic inhibition.
threshold is reached and an AP is fired.
many APs are fired.
the membrane depolarizes.
Answers
When X fires 10 times and Y fires 10 times, the result will be a subthreshold summation.
Subthreshold summation happens when two or more presynaptic inputs that are sub-threshold (i.e., they cannot create an action potential) combine their effects on the postsynaptic neuron.
Here, the postsynaptic neuron has an RMP of -70mV and a typical threshold of -55mV. When neuron X is stimulated, it depolarizes by 0.5 mV.
When X and Y are stimulated simultaneously, the postsynaptic neuron depolarizes by 1 mV, which is sub-threshold (below -55mV).
Therefore, when X fires 10 times and Y fires 10 times, the postsynaptic neuron will experience subthreshold summation and no action potential will be fired.
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Why do all cells in the body need oxygen?
Answers
Answer:
For nutrition and energy
Explanation:
Oxygen has some chemicals that the body transfers into nutrition and energy. Without this your body would not be able to function properly. When we exhale (CO2) that was chemicals the body doesn't want or need.
Hope this helps
Forested floodplain wetlands benefit from periodic flooding from rivers. When floodwaters spill into the wetland, they bring water and nutrients and leave both behind. But humans have often cut off floodplains from rivers by building roads, levees, berms, etc. Think about what would happen if a river could no longer flood into these areas. How would the resulting increased amount of water and nutrients in the river affect soils, hydrology, and life downstream?
Answers
The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.
If a river can no longer flood into forested floodplain wetlands due to human interventions, it would have significant consequences for the downstream areas in terms of soils, hydrology, and life.Without periodic flooding, the increased amount of water and nutrients in the river would not be able to disperse and be deposited in the floodplain wetlands. As a result, downstream soils would experience a decrease in nutrient inputs, leading to decreased fertility and altered composition. The absence of regular flooding would disrupt the natural hydrological cycle, reducing the recharge of groundwater and altering the flow patterns in the river system. This could result in decreased water availability, increased erosion, and changes in the overall ecosystem dynamics downstream.The disruption of nutrient flows and hydrological patterns would also have a significant impact on the life forms downstream. Aquatic plants, fish, and other organisms that depend on floodplain wetlands for breeding, feeding, and shelter would face habitat loss and reduced food availability. This, in turn, could disrupt the food chain and impact the abundance and diversity of aquatic and terrestrial species in the downstream areas.The absence of flooding from rivers into forested floodplain wetlands would lead to adverse effects on soils, hydrology, and the overall biodiversity downstream, emphasizing the importance of maintaining the natural connection between rivers and floodplains for the health and functioning of these ecosystems.For more such questions on flooding
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What is the ploidy of daughter cells produced after Meiosis I and Meiosis II?
Answers
Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells while maintaining the number of chromosomes in each cell.
After meiosis 1, what is the ploidy of the daughter cells?The DNA ploidy number is 2N at the end of meiosis I, and it is 2N at the end of meiosis II., it is 1N. The cell repeats its DNA during DNA replication before meiosis.
How many ploidies are there in meiosis 1 and 2?While Meiosis II divides the remaining set of chromosomes in a mechanism akin to mitosis, Meiosis I reduces the ploidy level from 2n to n (reduction) (division). Meiosis I is when the majority of the distinctions between the processes take place.
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Which statement best explains the reason for daily high and low tides
1:warm less dense water rises moving cold dense water toward the shore
2:Earth is titled on an axis causing water to spread unevenly across the planet
3:the moons gravitational pull on earth causes water to bulge on to sides of the earth
4: Volcanic activity on the ocean causes water to swell?
Someone plz help me I have to submit it in 10 mins
Answers
Answer:
the moons gravitational pull on earth causes water to bulge on to sides of the earth
Explanation:
why do you think we should wear mask?
Answers
Answer:
So that we can limit the cases and keep safe :)
Explanation:
Answer:
masks slow the spread of the virus and or prevent you from catching the virus.
Describe structure of schizocelous?
Answers
Answer: A method by which some animal embryos develop is called schizocoely (adjective forms: schizocoelous or schizocoelic). When secondary bodily cavities (coeloms) are created by breaking a solid mass of mesodermal embryonic tissue, the schizocoely process takes place.
Answer:
Schizocoelom: It is present in the protostomes. The body cavity or coelom originates from the splitting of the mesoderm. One part attaches to ectoderm and the other surrounds the endoderm. The space between them develops into the coelom. The blastopore forms the mouth. Examples of schizocoelous animals are Annelida, Arthropoda and Mollusca. In Arthropoda and Mollusca the coelom is filled by blood and is known as Haemocoel.
What does biology study?
Answers
Answer:
biology is the study of plants and animals
Explanation:
Biology is defined as the study of living things and their vital processes of life. The word biology was coined from two Greek words: bio means life and logos means study
How long does humans know that long gone animals have been on earth?Explain why or why not?
Answers
Answer:
Fossils
Explanation:
By using fossils we can not only know that extinct animals once roamed the planet, but also get an estimate of when they did so. We can use fossils to pin down their location (which we can use to see what might have killed them, resource loss, climate change, human interaction, etc.), to see when they appeared and went extinct (thanks to rock layers and knowledge of geology), and even what may have been in their diets (based on location or.. well, other pieces of evidence, if you know what I mean.) Fossils also give you their size and shape which can help paleontologists determine the type of animal, ex. birdlike, reptile, mammal, etc.
NEED HELP ASAP * is my answer
Scientists are studying compounds in a newly discovered rain forest plant. The plant produces an unusual substance that local people say acts as an anesthetic. One scientist tested the substance with the chemical indicator iodine.
If the test is negative, which type of macromolecule is not present in the substance?
nucleic acid
carbohydrate
protein
lipid
Answers
Answer:
protein
Explanation:
Answer: The macromolecul that is not present is carbohydrates
What is a reflex?
ASAP!
Answers
Answer:
the answer is letter D because non of the other answers are correct
Answer:
The answer is the last one: part of the nervous system that connects the sensory receptors to the muscles
Four students described the characteristics of four different states of matter. The table below shows the description given by each student.
Description of States of Matter
Student Description
Timothy Takes the shape of the container
Amelia Charged particles moving independently in large space
Jack Particles arranged in a fixed lattice
Derrick Takes the entire space available
Who described gases?
Timothy
Amelia
Jack
Derrick
Answers
Answer:
A.
Explanation:
Liquid particles are close enough but not too tightly packed like solids.
Solid particles are tightly packed so that they can't move.
Gas particles move randomly.
They constantly collide with each other. This type of motion is called Brownian Movement.
Answer:
derrick
Explanation:
it was derrick I tried Amelia and it was wrong
In a population the homozygous dominant individual make up 70% of the population while heterozygous ones made up 21% and recessive made up 9%. What are the frequencies of the A and a alleles?
Answers
There are two alleles in a population that influence a specific attribute. Using the letters "A" for the dominant allele and "a" for the recessive allele. A allele frequency is 0.7, whereas frequency of allele is 0.09.
The frequency of the A allele is 0.7, or 70%, since homozygous dominant (AA) genotypes account for 70% of the population. Similarly, since homozygous recessive (aa) alleles make up 9% of the population, we can infer that the frequency of the recessive allele, a, is 0.09, or 9%.
The formula 2pq = frequency of heterozygotes, where p is the frequency of the A allele and q is the frequency of the an allele, can be used to determine the frequency of the heterozygous genotype (Aa).
We know that the frequency of heterozygotes is 0.21, or 21%.
Plugging in the known values:
2 * 0.7 * q = 0.21
Solving for q:
q = 0.15
So, the frequency of the A allele is 0.7, and the frequency of the a allele is 0.09.
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Elephants are considered K-strategists because they give birth to only one calf at a time and most have five years in between having another calf. Calves stay under the protection of the mother and her herd until maturity at 10-15 years of age. What type of survivorship curve do elephants tend to follow
Answers
Answer:
Type I curve
Explanation:
The K-strategist are species characterized by relatively stable populations that fluctuate at the carrying capacity of the habitat or niche in which organisms reside. Elephants are considered as K-strategists because they have a low population growth rate and relatively stable populations. There are three different types of survivorship curves. The Type I curve (also referred to as A curve) is characteristic of k-strategist organisms. Humans and elephants exhibit a Type I survivorship curve in which organisms tend to die when they become elderly. These species have a small number of offspring and provide parental care to ensure their survival. In a Type II survivorship curve, species produce many offspring and only some offspring survive (e.g., birds), while in Type III survivorship curve organisms produce many more offspring and most do not survive (i.e., r-strategists such as frogs or insects).