Answers
The r horizon in a soil profile relates to the bottom layer.
The bottom layer is known as the R horizon or bedrock. The R horizon maybe 60 feet beneath the surface in certain locations. Other locations could just have a 6-foot or so difference. Unlike the thinner layers above it, the R horizon is distinguished by strongly connected, unbreakable materials.
If the bedrock is near enough to the surface to weather, a mass of rock, such as granite, volcanic, quartzite, limestone, or sandstone, serves as the parent material for various soils.
The parent material, or solid bedrock, is the R horizon. Due to varying bedrock and weathering processes, every soil is unique.
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Related Questions
What led to the extinction of the Pinta Island tortoises?
Answers
Answer:
19th century They were extinct do to Hunting
Explanation:
They were extinct do to Hunting
Hi can someone whos good with biology please help me with this im struggling with it
Answers
Explanation:
For the Punnett square, for each genotype (Letters), you just find out how many of a certain combination in the boxes that there are .
(e.g, if there's one BBRR = 1/16, if there's 3 BbRrs = 3/16)
Do that for each Genotypic Ratio.
For the phenotypic ratio, you need to find out which genotype is dominant, and if the genotype combo will show up in a guinea pig physically.
For example, for the Black, Rough Phenotype, it would be the BBRR combo, since both are dominant and will be present in the guinea pig.
i hope this helped you !!!!!!!!!!!
A dihybrid cross is a breeding experiment that involves studying the inheritance patterns of two different traits simultaneously.
It examines the inheritance of two different genes located on different pairs of homologous chromosomes. This type of cross allows for the analysis of independent assortment and the determination of the phenotypic and genotypic ratios of offspring.
The genotypic and phenotypic ratios are:
Genotype ratio:
BBRR: 1/16
BBRr: 2/16
BBrr: 1/16
BbRR: 2/16
BbRr: 4/16
Bbrr: 2/16
bbRR: 1/16
bbRr: 2/16
bbrr: 1/16
Phenotype ratio:
Black, rough: 9/16
Black, smooth: 3/16
White, rough: 3/16
White, smooth: 1/16
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Which of the following is NOT a function of mitosis?
Group of answer choices
Growth and development of multicellular organisms.
Reproduction of single celled organisms.
Development of sperm and egg cells.
Tissue growth and repair.
Answers
Answer:
I believe the best answer is somatic cell
1
Evan is a horticulturist working in a greenhouse. He arranges some flowers nearer the windows, others farther away. For the flowers he arranges to
get the most light, what process is Evan MOST likely trying to encourage?
A.fertilization
B.photosynthesis
C. cross-pollination
D. phototropism
reserved.
Answers
Phototropism is the process that Evan is most likely trying to encourage by arranging the flowers nearer the windows to get the most light. Thererfore, option (D) is correct.
What is Phototropism?Phototropism is a growth response in plants in which they orient their stems or leaves towards or away from a light source. The process is controlled by a plant hormone called auxin, which moves away from the light and accumulates on the shaded side of the plant. This accumulation causes the cells on the shaded side to elongate, which results in the plant bending towards the light.
Phototropism is critical for the survival and growth of plants, as it enables them to maximize their exposure to light for photosynthesis. The process is also important for the efficient use of resources, as it allows plants to direct their growth towards the most favorable light conditions and avoid shading by neighboring plants.
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Which of the following statements about feedback regulation of a metabolic pathway is correct?
A) The compound that regulates the pathway acts as a competitive inhibitor or a positive allosteric regulator.
B) The enzyme that is regulated by feedback inhibition is usually the last enzyme in the metabolic pathway.
C) The final product of a metabolic pathway is usually the compound that regulates the pathway.
D) The products of the pathway become the reactants for a different reaction, and thus products are unable to accumulate.
E) Accumulation of the product of the pathway increases further formation of that product.
Answers
Answer:
Correct answer is: B) The final product of a metabolic pathway is usually the compound that regulates the pathway.
Explanation:
Feedback regulation of a metabolic pathway is a mechanism by which the end product of a pathway inhibits an enzyme that catalyzes an early step in the pathway, thus preventing the overaccumulation of the product. This is an example of negative feedback, which maintains homeostasis and optimizes the efficiency of the pathway.
For example, in the synthesis of the amino acid isoleucine from threonine, the final product isoleucine binds to the allosteric site of the first enzyme in the pathway, threonine deaminase, and inhibits its activity. This reduces the rate of the pathway and prevents the excess production of isoleucine.
Penelope lived in California and was working with her local
community to help prevent desertification in their area due to the
drought. The community consisted of many residences, a variety
of industries, and a few farms. What is one way to help prevent
desertification?
allow livestock to overgraze the pasture
remove trees and other natural vegetation
overwater the ground causing soil erosion
rotate different crops that are grown each season
Answers
Answer:
d. rotate different crops that are grown each season
Explanation:
because different crops need different recources and that gives it a break its the only reasonable answer
allow livestock to overgraze the pasture makes zero sense and would make the problem much worse
remove trees and other natural vegetation would also hurt the environment
overwater the ground causing soil erosion its better but would do nothing to aid in the goal
so hense the last one(my family are farmers)
DNA originally contains two parent strands, each forming one side of the double helix. After replication, each of these parent strands is copied into a daughter strand, so the overall result is 2 identical daughter cells. The process of DNA replication. In a semi-conservative model of DNA replication, which of the following is true?
The daughter DNA molecule consists of 1 parent strand and 1 new strand
The daughter DNA molecule consists of 2 newly formed strands
The daughter DNA molecule consists of 2 parent strands
The daughter DNA molecule consists of an uneven mix of old and new strands
Answers
DNA replication is semi-conservative because the original molecule separates into two different strands, and each of them works as a model for a new strand to grow. A) The daughter DNA molecule consists of 1 parent strand and 1 new strand.
Why is DNA replication a semi-conservative event?
DNI replication is semi-conservative because, after replication, each new molecule carries an original DNI strand and a new one. The fact that the new molecule is composed of an original strand makes it semi-conservative. The old existing strands are used to synthesize the new complementary strand.
The replication products are double-stranded DNA molecules, each carrying an original strand and a new one.
The correct option is A) The daughter DNA molecule consists of 1 parent strand and 1 new strand.
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In a semi-conservative model of DNA replication, the daughter DNA molecule consists of 1 parent strand and 1 new strand. Option 1.
Semi-conservative DNA replicationThe process of DNA is naturally semi-conservative.
This is because each strand of the original DNA forms a template for the synthesis of a complementary strand. Thereafter, each of the newly synthesized strands forms a double helix structure with their respective parent strands.
Thus, e newly replicated DNA molecule usually consists of 1 old strand and 1 new strand. Consequently, the process is described as being semi-conservative.
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describe the internal diameter of the aorta.
Answers
Answer:
In sonographic measurements performed in the transverse view, the diameter of aorta (Ao) constituted 15.7 mm, the longer dimension of the inferior vena cava (IVC1) equaled 28.4 mm and the shorter one (IVC2) – 15.5 mm. In the longitudinal view, Ao equaled 15.3 mm and IVC – 18.8 mm (tab.
4.) What were the alleles for the gene wing color in peppered moths? How were these alleles impacted duet
the Industrial Revolution?
Answers
Answer:
The peppered moth is a diploid (2n) organism; there are two copies of each gene locus. An individual in a population can have a genotype of AA, Aa, or aa. The A allele for dark-colored wings is dominant over the a allele for light-colored wings
Explanation:
Organisms that share the same feeding level (e.g. primary producers, primary consumers, secondary consumers, etc.) are said to be at the same
A) food web
B) niche order
C) trophic level
D) food pyramid
Answers
Organisms that share the same feeding level (e.g. primary producers, primary consumers, secondary consumers, etc.) are said to be at the same trophic level and is therefore denoted as option C.
What is Trophic level?This is referred to as a level or a position in a food chain, a food web, or an ecological pyramid.
This comprises of organisms which have a common feeding level such as primary producers which is usually occupied by plants, primary consumers, secondary consumers, etc thereby making it the correct choice.
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Match the correct ones together
Answers
Hello-
The Biosphere option would match with the answer concerning plants (the bottom right box) since the biosphere concerns living things.
The Hydrosphere option would match with the answer concerning rain (the middle right box). Hydro = water.
The Lithosphere option, then, would go with the last remaining answer, concerning volcanoes (the top right box).
I hope this answers your question.
what opposes the sliding motion of two
surfaces that are in contact.
Answers
Answer:
Friction: A force that opposes the motion of objects that touch as they move past each other. Friction acts at the surface where objects are in contact.
Explanation:
The force that acts against your pushing force is called friction. is a force that resists the motion between two surfaces in contact. When you try to slide two surfaces across each other, the force of friction resists the sliding motion.
Identify the terms described by selecting the correct word from the drop-down menu.
Anything that has mass and takes up space
The part of Earth in which life exists, including land, water, and air
Answers
The substance that occupies space and mass is called matter, and the biosphere is the part of the earth that includes life. Thus, the correct options are 1. c and 2. b.
What is biosphere?All ecosystems on Earth that support life are collectively referred to as the biosphere. The biosphere encompasses everything from the deepest tree roots to the shadowy depths of ocean trenches, lush rain forests, lofty mountain summits, and transitional regions like this one where marine and terrestrial ecosystems converge.
Hence , Matter is anything that can occupy space and ot posses mass.
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complete question:
1. Anything that has mass and takes up space
Atom
Element
Matter
2. The part of the earth in which life exists including land water and air
Thermosphere
Biosphere
Exosphere
FILL IN THE BLANK 4 points item 22 generalizing from the text, one would predict that characteristics that exhibit a _____ degree of canalization would display a _______ level of concordance in monozygotic twins.
Answers
Generalizing from the text, one would predict that characteristics that exhibit a high degree of canalization would display a high level of concordance in monozygotic twins.
Whenever a single egg cell is fertilized by a solitary sperm cell, it results in monozygotic twins, also known as identical twins. Early in development, the subsequent zygote divides into two, causing the development of two different embryos. Monozygotic victories occur in nearly 4 out of every 1,000 births worldwide.
Canalisation is an amount of a population's capacity to generate the same phenotype irrespective of environmental or genotypic variability. It's a type of evolutionary toughness.
Semi-identical or half-twins are an unique type of monozygotic twins that occur when two distinct sperm fertilize one egg. This is another case in which you can obtain two genders, but they are not truly "identical" twins because the egg was fertilized by two sperm rather than one.
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Between which two planets is Jupiter located in our solar system?
O Venus and Earth
O Mercury and Venus
O Earth and Mars
O Mars and Saturn
Answers
Answer:
Mars and Saturn
have a nice day
why do you add chilled methylated spirits to the filtrate
Answers
Answer:
The detergent breaks apart the cellular membranes and the salt binds to the DNA to make it less able to remain soluble in water (it neutralizes the charge of the DNA and it is less able to bind to water).
Explanation:
hope this helps
Which of the following do animals gain from cellular respiration?
Carbon dioxide
O Sugar
O Energy
O Water
Answers
Answer:
carbon dioxide , Water
hope it help
When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals?
Answers
Answer:
3 A the 13 group boron is the nonmetal in it and in 14 group carbon is the nonmetal
Explanation:
Marty created a design idea for observing how a shadow changes throughout the year. For his design, he needed an object that did not move, so he used the school's flagpole. He measured the flagpole's shadow on the first day of each month at exactly 9:00 a.m. Marty's data is shown in the table.
Month Length of Shadow
(in feet)
August 23
September 24
October 25
November 26
December 27
What is the pattern in the data Marty collected?
A.
The flagpole's shadow changed color each month.
B.
The flagpole's shadow got longer each month as autumn turned to winter.
C.
The flagpole's shadow was longer in the summer than in the winter.
D.
The flagpole's shadow got wider each month.
Answers
Answer:
The flagpole shadow got longer each mouth as autumn turned to winter
Explanation:
Answer:
c) the flagpole's shadow was longer in the summer than in the winter.
Explanation:
i tried this answer on study island and it was correct!!
What term is used for species that are at serious risk of extinction?
Answers
Answer:
Endangered species
The conformational change in an enzyme after the substrate is bound that allows the chemical reaction to proceed, can be explained by
A.induced fit
B. transition
C. fit and fine
D. Pasteur
Answers
tall heterozygous pea plants were crossed and the resulting seeds grown. Out of 360 plants, 270 were tall and 90 dwarf. What describes the expected genotype resulting from the cross
Answers
Answer:
This question lacks options, the options are:
A. All 270 tall plants were heterozygous
B. All 270 tall plants were homzygous.
C. Only 90 plants were homzygous.
D. All dwarf plants were homzygous.
The answer is D.
Explanation:
This question involves a single gene coding for height in pea plants. The allele for tallness (T) is dominant over that of dwarfness (t). This means that a dwarf plant can only be homzygous recessive (tt) while a tall plant can either be homzygous (TT) or heterozygous (Tt).
According to the question, two tall heterozygous pea plants were crossed i.e. Tt × Tt. Based on this cross, a phenotypic ratio of 3:1 is expected, which is in accordance with the 270 tall plants and 90 dwarf plants (360 total) that was obtained in the cross. Since dwarfism in pea plants is a recessive trait, this means that all the dwarf plants produced in this cross (90) were homzygous (tt).
The expected genotype resulting from the cross was that all dwarf plants were purebreed.
So, according to the given information, there is a cross between Tt × Tt. A phenotypic ratio of 3:1 is desired, which is in accord with the 270 tall plants and 90 dwarf plants (360 total) that were got in the cross.
Since dwarfism in pea plants is a different feature, this means that all the dwarf plants produced in this cross (90) were (tt).
What are the 3 principles of Mendelian genetics?
The fundamental principles of Mendelian inheritance by Mendel's three laws:
The Law of Independent Assortment,Law of Dominance, andLaw of SegregationThus, the cross was that all dwarf plants were purebreed.
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Which are the main parts of a flowering plant? Select four options. seeds roots stem leaves flowers
Answers
Answer:
Flowers stem leaves roots.
Explanation:
The main parts of a flowering plant are flowers stem leaves root.
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Impact of lymphatic disorder
Answers
Answer:
The lymphatic system clears away infection and keeps your body fluids in balance. If it's not working properly, fluid builds in your tissues and causes swelling, called lymphedema. Other lymphatic system problems can include infections, blockage, and cancer.
Explanation:
II found this on the internet cause i don't really know. Hope it helps
29.4.5 Quiz: Globalization and the Natural Environment
Question 9 of 15
Why is water considered a renewable resource?
A. It is less expensive than other sources of energy.
B. It can be obtained from the natural environment.
C. It is used faster than it can be cleaned or replenished.
OD. It can be replaced with natural processes over time.
SUBMIT
Answers
Answer:
it can be replaced with natural processes over time.
A punnett square is said to determine the ...
A. results of mitosis
B. actual outcomes of a cross
C. results of meiosis
D.probable outcome of a cross
Answers
Answer:
D
Explanation:
A punnett square identifies the combination of two genomes. Depending on the specific set of genes, the combinations may be different. It measures probable outcomes by separating into Dominate and Recessive genes, Dominate overpowering recessive and therefore being more common.
As a skeletal muscle continues to contract, the amount of ATP available is _____, leading to weakening contractions, a phenomenon called muscle fatigue.
Answers
As a skeletal muscle continues to contract, the amount of ATP available is reduced, leading to weakening contractions, a phenomenon called muscle fatigue.
Does excess ATP cause muscle fatigue?In contrast, as soon as the exercise intensity exceeds the ATP synthesis rates of oxidative phosphorylation requiring an increased reliance on anaerobic metabolism, force and power become impaired, fatigue develops, and failure to sustain the exercise occurs within seconds to minutes of the onset of contractile activity.There are two main causes of muscle fatigue: the limitations of a nerve's ability to generate a sustained signal (neural fatigue); and the reduced ability of the muscle fiber to contract (metabolic fatigue).Learn more about muscle fatigue here: brainly.com/question/28179328
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Let’s review the normal baroreceptor reflex. Drag the labels onto the figure to create a flow chart of how the baroreceptor reflex would respond to decreased mean arterial pressure. View Available Hint(s)
Answers
Mechanoreceptors known as baroreceptors enable the autonomic nervous system to communicate information generated from blood pressure.
Thus, Baroreceptors come in two varieties: low-pressure volume receptors and high-pressure arterial baroreceptors, both of which are triggered by stretching of the vessel wall.
Carotid sinuses and the aortic arch both include arterial baroreceptors. The atria, ventricles, and pulmonary vasculature all include low-pressure volume receptors (also known as cardiopulmonary receptors).
When you experience something that raises or lowers your blood pressure, the baroreceptor reflex keeps it constant. Your blood pressure is swiftly returned to normal range after a complicated sequence of procedures.
Thus, Mechanoreceptors known as baroreceptors enable the autonomic nervous system to communicate information generated from blood pressure.
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Why is grafting considered asexual reproduction and not sexual
reproduction?
Answers
Answer:
The reason that grafting is not considered sexual is because there is no conjoining of male and female germ cells. (there is no germination like how sperm and egg cells do). So its considered asexual
Explanation:
Long before the structure of DNA was solved, the physicist Erwin Schrodinger suggested that the three-dimensional arrangement in some polymer had to explain the two main properties of heredity: 1) the stability of life, such that traits were passed faithfully from generation to generation, and 2) the mutability of life, such that traits could change. How did Watson and Crick’s structure explain those two properties?
Answers
Watson and Crick's model explained mutability because bases pairs can suffer changes (mutations) during DNA replication. Moreover, this model also explained stability because DNA strands are held together by hydrogen bonds.
Deoxyribonucleic acid (DNA) is a double helix molecule composed of two long chains of four types of nucleotides, each containing one different nitrogenous base, i.e., Adenine, Guanine, Cytosine and Thymine.
In Watson and Crick's model, both DNA strands are held together by hydrogen bonds between nitrogenous bases on opposite DNA strands, thereby providing stability to the DNA molecule.
In DNA, Guanine always pairs with Cytosine by three hydrogen bonds, while Adenine always pairs with Thymine by two hydrogen bonds.
Moreover, Watson and Crick suggested that mutations could occur as a consequence of a base occurring very infrequently in one of the less likely tautomeric forms during DNA replication, thereby also explaining the mutability of life.
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