Answer and Explanation:
Chlorophyll a is the most used photosynthetic pigment and absorbs blue, red and violet wavelengths in the visible spectrum. It participates mainly in oxygenic photosynthesis in which oxygen is the main byproduct of the process. Chlorophyll b primarily absorbs blue light and is used to complement the absorption spectrum of chlorophyll a by extending the range of light wavelengths a photosynthetic organism is able to absorb.
Both of these chlorophyll molecules capture light energy and transfer it to the reaction center of the cell. Henceforth, electrons are passed from this absorbed light energy to water molecules resulting in the formation of hydrogen ions and oxygen atoms.
The main function of chlorophyll a and b is to absorb light energy during photosynthesis, initiating the conversion of light energy into chemical energy essential for plant growth and metabolism.
The main function of the green pigments chlorophyll a and b is to absorb light energy during the process of photosynthesis in plants. These pigments are embedded within the thylakoid membranes of chloroplasts, where they play a critical role in capturing photons of light energy from sunlight.
Chlorophyll molecules specifically absorb blue and red wavelengths of light, while reflecting or transmitting green wavelengths, giving plants their characteristic green color.
Once light energy is absorbed by chlorophyll, it initiates the process of photosynthesis, where light energy is converted into chemical energy in the form of ATP and NADPH, which are used to fuel the synthesis of organic molecules, such as glucose, from carbon dioxide and water.
After a natural disaster such as a hurricane or tornado, what will happen in the damaged ecosystem?
A) Nothing; it will remain uninhabited.
B) A new, different ecosystem will evolve.
C) An ecosystem like the previous one will be re-established.
D) No one really knows what to expect after a natural disaster.
Answer:
C
Explanation:
C. It's right.
Answer:
An ecosystem like the previous one will be re-established
Explanation:
3. In what possible scenario would the female birds evolve to having the singing trait? (5 points)
Answer:
I think the birds stopped singing because there are too many predators that found and ate them. If the predators left, or if there were less, more birds will start singing because there will be a less chance of getting eaten or preyed on.
Final answer:
Female birds might evolve the singing trait if estrogens affect their sensory capabilities, which could lead to changes in mate selection and reproductive success. This trait may be selected for if there is a preference for certain songs associated with specific beak sizes that contribute to reproductive isolation.
Explanation:
In a scenario where female birds evolve to have the singing trait, we must consider several key factors related to natural selection and mate choice. Mate selection in birds is often mediated by song, and through this process, certain traits are preferentially selected as they enhance reproductive success. Should estrogens influence birds' sensory capabilities, it might make environmental cues for singing more salient, hence potentially leading to females singing if it offers a selective advantage.
One example could involve reproductive isolation, where populations of birds become separated. If beak size and shape influence song, and if females prefer songs similar to their own, singing could become a trait under sexual selection pressure in females. If this leads to preferential mating and strengthens reproductive barriers, it may result in females evolving the singing trait to ensure reproductive success and minimize detrimental hybridization.
A neuron in the skin detects tissue damage in the skin during a burn and informs the brain and spinal cord. This neuron is part of what pathway?
Explanation:
The neuron is part of the somatosensory pathway
The nervous system is subdivided into; the central nervous system (CNS), which includes the brain and spinal cord, within the vertebral column; and the peripheral nervous system, which includes nerves that branch into the rest of the body from the brain and spinal cord. Nervous tissue responds to electrical impulses, allowing for communication between different regions of the body.
The peripheral nervous system is further divided into the somatic nervous system responsible for carrying out sensory and motor information between the peripheral nervous system- including sensory organs like the eyes; and central nervous system; and the autonomic nervous system which regulates involuntary bodily functions like heartbeat, breathing and blood flow. The ANS is mainly acts unconsciously and affects smooth muscle and internal organs. It is related to homeostasis- where the body maintains a constant internal balance in pH, temperature, blood pressure etc.
Somatosensory pathways contain primary, secondary, and tertiary neurons which are capable of processing information about vibration, touch, temperature, and pain- information is passed on after receiving stimuli from the body's internal or skin receptors. Thus the precision is greater in the lips and fingers (directly involved in tactile interactions with stimuli) than on the back.
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What is the role of the structure shown here during protein synthesis?
A) mRNA delivers codons from DNA in the nucleus
B) mRNA attaches to the ribosome
C) rRNA forms ribosomes
D) tRNA transports amino acids from the cytoplasm to the ribosome for translation
Answer:
D) tRNA transports amino acids from the cytoplasm to the ribosome for translation
Explanation:
The structure illustrate the transfer ribonucleic acid or tRNA.
The tRNA contains the anticodon in the form of amino acids and as such, it transports the amino acids from the cytoplasm where it is located to the ribosome during protein synthesis.
On getting to the ribosome, the anticodon on the tRNA binds with the codons on the mRNA and this results into the translation of the respective amino acids.
The translated amino acids are then linked together by a peptide bond to complete the process of protein synthesis.
Create a Punnett square to solve the following sex-linked inheritance problem (remember to use the sand
ss a male who does not have hemophilia with a woman who does hoy
Hemophilia is a sex-linked recessive trait. Cross a male who does not have hemophilia with
hemophilia. What is the probability of the following:
Male children with hemophilia:
Male children without hemophilia:
Female children with hemophilia:
Female children that are carriers for hemophilia:
Answer AND Explanation:
Let H represent gene for normal blood clotting and h for haemophilia.
XH Y
Xh XHXh XhY
Xh XhXH XhY
Male children with hemophilia: 50%
Male children without hemophilia: 0 %
Female children with hemophilia: 0%
Female children that are carriers for hemophilia: 50%
Name of the organ systems that you use for walking from the front of the school yard
Answer:
Leg
hope so , joint
may be
How is a dihybrid Punnett Square different from a monohybrid Punnett square?
Answer:
A dihybrid cross tracks two traits. Both parents are heterozygous, and one allele for each trait exhibits complete dominance. A monohybrid cross is a breeding experiment between P generation (parental generation) organisms that differ in a single given trait.
Answer:
Dihybrid shows more phenotypes
Explanation:
For a monohybrid cross, individual alleles are used, whereas for a dihybrid cross, pairs of alleles are used. A Punnett square for a monohybrid cross is divided into four squares, whereas a Punnett square for a dihybrid cross is divided into 16 squares.
Explain how the wound healed itself over time
Skin injuries initiate a healing process involving blood clot formation and cell repair stages.
The first step involves the formation of a blood clot that stops bleeding. Various cells participate in repairing the wound, with fibroblasts aiding in collagen replacement and angiogenesis promoting new blood vessel growth.
Which is one of the bases found in DNA?
Answer:
a, c, t, g
Explanation:
uracil (u) is in place of t in rna
The protein channel illustrated in model three is a ligand gated channel. What must occur for the gate to open and allow movement of ions across the membrane?
Answer:
The ligand must bind to a target protein to move ions across the membrane.
Yabine is studying energy from food in her nutrition class. She learns that fats, proteins, and carbohydrates can store different amounts of energy because they have different chemical
Answer:
She learns that fats,proteins and carbohydrates can store different amount of energy because they have different chemical structure or construction.
Explanation:
Carbohydrate,protein and fat differ in their chemical structure.
Carbohydrates are the polyhydroxy aldehydes or polyhydroxy ketones.Proteins are the polymer of amino acids joined by peptide linkage whereas fats are the monomer of fatty acid.
Monosaccharide,amino acids and fatty acid differ in their chemical and biochemical structure and also contain different number of carbon atoms.
That"s why carbohydrate,protein and fat can store different amount of energy.
Carbohydrates, lipids, and proteins are energy-yielding nutrients that the body breaks down into molecules small enough to be absorbed and converted to ATP. These nutrients can be obtained from plant and animal foods and can sustain life for several weeks.
Explanation:The energy-yielding nutrients are primarily carbohydrates and lipids, while proteins mainly supply the amino acids that are the building blocks of the body itself. You ingest these in plant and animal foods and beverages, and the digestive system breaks them down into molecules small enough to be absorbed. The breakdown products of carbohydrates and lipids can then be used in the metabolic processes that convert them to ATP. Although you might feel as if you are starving after missing a single meal, you can survive without consuming the energy-yielding nutrients for at least several weeks.
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Explain why plants along the road often die after the road is sprayed with a salt solution to melt ice
Explanation:
The salt solution is meant to lower the ice melting point hence keep most of the water from turning into ice even at zero degrees temperatures. The salts are dissolved in the water to form a salty solution that percolates the ground and reach plant roots. Because the salty water is hypertonic (more concentrated) to the cell cytoplasm of the plant roots, water is drawn from the plant by osmosis. This is the reversal of normal plant root absorption of water from the soil. This causes the plant root to wither and subsequently the whole plant to die. Remember in osmosis, water moves from the less concentrated solution to the more concentrated solution through a semipermeable membrane.
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Gametes produced by an organism contain a combination of genes from that organization. In every gamete, this combination is -
Answer:
In every gamete, this combination is haploid.
Explanation:
When we talk about gametes, we refer to specialized haploid cells for reproduction. It is these cells that unite in fertilization and originate a new being and they are, therefore, that carry the characteristics that must be passed on to a new generation. A haploid cell has only one set of chromosomes (n), while diploid cells have two sets of chromosomes (2n).
Human gametes are sperm and eggs. Sperm are male reproductive cells and are formed in seminiferous tubules, a region of the testicles. Men, after puberty, produce sperm continuously until the end of life. The sperm formation process is called spermatogenesis.
Female gametes, in turn, are eggs, more correctly called oocytes or secondary oocytes. These cells are produced in the female ovary, inside the ovarian follicles. Unlike men, female gametes are still produced in embryonic development and, subsequently, undergo a maturation phase. The woman normally releases eggs at puberty until menopause. The process of forming the female gamete is called ovogenesis or ovulogenesis.
stion 5
An increase in carbon dioxide in the atmosphere will MOST likely
affect which type earth activity?
complete
hts out of
Select one:
O
a. Volcanic eruption frequency
Flag
estion
O
b. Mantle convection rate
O
c. Cave formation rates
O
d. Earthquake frequency
Check
Next pa
Answer:
An increase in carbon dioxide in the atmosphere will MOST likely affect C: Cave formation rates .
Explanation:
"Carbon-di-oxide" is an important gas which 'controls' the Earth's temperature. CO2 including methane are greenhouse gases which absorb a lot of energy and then re-emit it. Without these gases, earth would get frozen. But, if these gases are in excess, then temperature of earth would rise like that of Venus, up to 400 degree Celsius.
If CO2 increases, there will be an increase in cave formation activity. Rain water takes CO2 from the air and penetrates in the soil. This results in formation of "limestone" as 'carbonate' accumulates in the soil. This forms 'cave of limestone' with the help of 'groundwater' as limestone dissolves easily in water.
Answer:
Less build up of ice at poles
Explanation:
The increase of carbon dioxide will increase global warming, which will cause the global temperature to increase, and cause less ice poles because of the high temperature.
HELP! 50 POINTS!! WRITE IN YOUR OWN WORDS! WILL MARK BRAINLIEST
Evolution is sometimes a controversial topic. Write a paragraph (minimum 5 short paragraphs) including the following:
What is your opinion about evolution?
Do you think there should be a controversy?
Do you think alternatives to evolution should be taught in schools?
Why or why not?
Answer:
Evolution in my opinion is something that is up to the individual to believe. The theory of evolution has neither been proven or disproven. I think there should be a controversy so that we can either prove the theory, or disprove it and think of a different theory. Teaching alternatives in school would be a great idea. It would let the student derive for themselves which one they think is more accurate.
Explanation:
When is the net movement of water equal to zero?
Answer:
Hypotonic solutions are those with less solute (again read as higher water potential). Isotonic solutions have equal (iso-) concentrations of substances. Water potentials are thus equal, although there will still be equal amounts of water movement in and out of the cell, the net flow is zero.
Explanation:
Final answer:
The net movement of water is equal to zero when the system is in a dynamic equilibrium, where the rates of water movement in and out of a region or across a boundary are balanced, resulting in no net change in volume.
Explanation:
The net movement of water is equal to zero in a state known as dynamic equilibrium. This can occur under various conditions in different contexts, such as in biological systems (osmotic equilibrium), in weather patterns (atmospheric moisture balance), and in geophysical settings (coastal dynamics). In a biological context, this typically refers to when the rate of water moving into a cell is equal to the rate of water moving out, and there is no net change in the water volume inside the cell. Similarly, in geophysical terms, a zero net water movement might be seen where there's a balance between inflow and outflow at a coastline.
For example, in coastal zones, if wave conditions are stationary (unchanging over time), and the velocity of water at the closed boundary (coastline) is zero due to a balance between different forces, no net movement of water occurs because inflow and outflow are in equilibrium. Additionally, in atmospheric transport, a zero net movement of water vapor could be represented as a balance, where loss due to factors like evaporation is compensated by a return flow through precipitation or other means at the regional scale.
Organization in which different cells are specialized for different functions, but each cell works alone, is characteristics of
A.cell-level organization
B.tissue-level organization
C.organ-level organization
D.organ system-level organization
Explanation:
B. tissue - level organization
How does increasing the size of the habitat affect carrying capacity? Explain your answer. Recall the scenarios: 0-15, Little land, 15-30 years, Moderate land; 30-45 years, Ample land.
Answer:
The maximum number of a particular kind of species that a habitat can hold is termed as the carrying capacity of that place. The carrying capacity depends on the availability of resources present in an area. If the population of a species goes beyond the carrying capacity, then the organisms will compete for food and other resources.
When the size of a habitat is increased, the carrying capacity will increase. This is because there will be more space and resources to feed more species. As there will be more resources, even the growth of plants will be more in that area.
Answer:
The carrying capacity of a habitat is the maximum number of organisms a habitat can sustain over a long period of time. Carrying capacity is dependent on the number of resources available in an area. Therefore, if the resources available increase, the population of that organism will also increase. In the three scenarios we tested how the population of rabbits changed over time with different amounts of land. When there was little land, the rabbit population was consistent, never exceeding 100. As we changed the setting to moderate land, we saw a population growth of around 2.3% (around 230). Lastly, when there was ample land, the rabbit population reached its height at around 430.
What happens to the image if you try to magnify it using 40X or 100X *
Answer: It gets bigger
Explanation:
Which of the following is not a typical pattern found in the Earth system?
a. rock cyclo
b. water cycle
carbon cycle
d. calcium cycle
Please select the best answer from the choices provided
Ooo
Answer:
D. calcium cycle
Calcium cycle is not a typical pattern found in the Earth system. :)
Molten materials cool at different rates. Which property of a mineral does this affect?
color
luster
crystal size
crystal shape
Answer:
The correct aswer is crystal size.
Explanation:
Cooling rate affects to the size of the crystal formed by cooling a molten material. A fast cooling produces small crystals whereas slow cooling produces large crystals. At a slow cooling rate, crystals have more time to grow and therefore they are larger than those are formed at a fast cooling rate.
Answer:
Crystal Size Is correct
Explanation:
Edg. 2020
which term refers to the behavior of two species attempting to use the same living space , food source ,and water source?
When referring to height in terms of genotypes, is there a reason why V and v are used to commonly represent the alleles?
Answer:
Explanation:
Geneticists use letters to represent alleles of different characters.
(Alleles: one of the two or more alleles of a character.)
A single letter is used to represent both the alleles of a particular character.
A capital letter represents a dominant allele, while a small letter represents a recessive one.
The letters do not just have one standard representation. same letter can be used to represent different characters. However, the letters may relate to the allele. For example: the letter 'B' can be used to represent Brown eyes.
which type of mutation results in the formation of a protein with one inccorrect amino acid
The type of mutation that results in the formation of a protein with one incorrect amino acid is missene mutation.
Explanation:
Missene mutations are point mutations where there a change occurs in a single nucleotide. This results in a different codon and the production of a different amino acid. Missene mutation is one of the simplest types of mutation.
Sometimes missene mutation cause the production of a protein that is similar to the protein which was o be produced. In this case much variations are not produced. This is called conservative mutation.
Some amino acids are encoded by more than one codon and if a mutation results in a new codon which codes for the same amino acid there will be no change in the protein produced. This is called synonymous substitution.
Diseases like sickle cell anaemia are caused by missene mutation.
Jordan discovered an organism in the back yard that obtains energy by consuming other organisms.
Which term best describes the organism?
A
producer
B
autotroph
C
plant
D
heterotroph
Answer: Heterotroph
A heterotroph is an organism that can’t produce its own food, so it takes it from other organisms. For example, animals eating other animals.
A heterotroph is the organism that obtains energy by consuming other organisms.
Heterotroph is an organism that cannot take an inorganic substance and create organic matter for itself, forcing it to feed on other living things.
Heterotrophic organisms feed on other organisms to obtain organic matter already synthesized because they do not have an independent food production system.They obtain energy, nitrogen and carbon by consuming other organisms.Therefore, we can conclude that heterotrophs always depend on another organisms for their subsistence, since they obtain their energy from an external source of organic matter.
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Which factor is most likely to have contributed to the high fertility rate in
Africa?
O
A. Lack of modern transportation systems
O
B. Lack of modern agricultural technology
O
c. Lack of economic opportunity for women
O
D. Lack of access to fresh water
Answer:
c. Lack of economic opportunity for women
Explanation:
Women with better economic opportunities, are able to position themselves better in relation to their body and their wills, than women with less economic opportunities. In addition, women with more economic opportunities are more likely to control their reproduction, while poorer women do not always have access to contraceptive methods and end up having more unscheduled children. This statement is common in places with high rates of social inequality, such as in Africa, where the high rate of fertility is directly linked to the lack of economic opportunity for women.
Which of the following is NOT an advantage of hydroelectric power?
A. It is clean, safe, and efficient.
B. It does not contribute to air pollution.
C. Only certain locations are suitable for building a dam.
D. Water is naturally renewed by the water cycle.
Answer: C is the correct answer, only certain locations are suitable for building a dam.
Explanation:
Ecologists will often represent the amount of potential food available for each trophic level in an ecosystem with a(n)
Answer:
Ecologists will often represent the amount of potential food available for each trophic level in an ecosystem with a(n) biomass pyramid.
Explanation:
A biomass pyramid can be defined as a diagram which quantifies the biomass as we move up the trophic levels in a pyramid. It is often plotted as the food (in calories or grams) per unit area. The biomass pyramid quantifies the biomass present at each trophic level.
Hence, a pyramid of biomass is the best way to represent the amount of food available at each trophic levels in a pyramid.
Ecologists will often represent the amount of potential food available for each trophic level in an ecosystem with a biomass pyramid.
Explanation:
Ecologists represent various structures of trophic levels in an ecosystem using ecological pyramids. Ecological biomass pyramids graphically depicts the bioproductivity or the amount of biomass produced and available in a unit area of a trophic level in an ecosystem.
The producers, are at the highest level, produce the highest amount of biomass is at the base of the pyramid; whereas, the tertiary consumers are at the least level with the least amount of biomass is at the top of the pyramid.
Ecologists use these data to depict the primary production of biomass at each level and the net productivity reached in an ecosystem.
which of the following is not a fossil fuel
Answer:
wood
Explanation:
Carbon dioxide made by cells leaves your body through the respiratory
system by moving from the
A. alveoli to the bronchi to the bronchioles
B. bronchi to the bronchioles to the nose
C. trachea to the bronchi to the bronchioles
D. bronchioles to the bronchi to the trachea
Answer:
The answer is D
Explanation:
After gaseous exchange take place in alveoli, unwanted gases such as CO2 will move from alveoli -> bronchioles -> brochi -> trachea -> nose .