Soil pH can affect plant growth in several ways. Bacteria that change and release nitrogen from organic matter and some fertilizers operate best in the pH range of 5.5 to 7.0 making this the optimum pH range. Plant nutrients leach from the soil much faster at pH values below 5.5 than from soils within the 5.5 to 7.0 range. In some mineral soils aluminum can be dissolved at pH levels below 5.0 becoming toxic to plant growth. Soil pH may also affect the availability of plant nutrients. Nutrients are most available to plants in the optimum 5.5 to 7.0 range. PH can also affect the structure of the soil, especially in clay soils. In the optimum range clay soils are granular and easy to work with. However, if the soil is either extremely acid or alkaline clay, soils tend to become sticky and hard to cultivate.
A pH soil test will tell you whether your soil is within the optimum range or whether it will need to be treated to adjust the pH level. Although the optimum range is 5.5 to 7.0 some plants will grow in a more acid soil and some at a more alkaline level.
PH is not an indication of fertility, but it does affect the availability of fertilizer nutrients. The soil may contain adequate nutrients yet plant health may be limited by an unfavorable pH level. On the other hand, builder’s sand, which is devoid of nutrients, may have optimum pH for plant growth.
Answer:
Asking a question
Explanation:
What is anaerobic respiration?
Classify the organisms based on whether they follow the Camegie stages of development
The correct answer is that a butterfly and an octopus do not have Carnegie stages of development, while elephants and turtles do. This is because Carnegie stages of development are stages found only in the development of the vertebrate embryo. Carnegie stages can be defined as a system in embryology, which include 23 stages of the embryonic development, each characterized with the different age, size and morphologic characteristics of an organism.
Organisms in the animal kingdom are classified based on their body morphology, developmental pathways, and embryological development. The Carnegie stages of development refers to the classification of human embryos based on their physical and internal features at different stages of development.
Explanation:Classifying Organisms by their Developmental Stages
Organisms in the animal kingdom are classified based on their body morphology, developmental pathways, and embryological development. The Carnegie stages of development specifically refer to the classification of human embryos based on their physical and internal features at different stages of development.
For example, the Carnegie stages can help identify when specific organ systems start to form or when major developmental milestones occur. However, it's important to note that the Carnegie stages are specific to human embryonic development and may not be applicable to all organisms in the animal kingdom. Other organisms may have their own unique classification systems based on their own specific developmental characteristics and stages.
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HELP!! How are mid-ocean ridges formed at divergent tectonic plates?
This submarine Mid-ocean Ridge owes its formation to the movement of the continental plates on either side of the ocean. As these plates slowly separate, they leave gaps in the earth's crust. This allows molten rock from beneath the earth's crust to reach the surface, forming a new part of the ocean floor.
Answer:
The stretching lithosphere is pushed up as the plate moves apart
Explanation:
Divergent tectonic plates involves moving apart of tectonic plates. At the divergent boundary plates separate from each other . An example is the oceanic ridge formed in the Atlantic oceanic crust.
The diverging movements of these plates cause magma to be introduce from the oceanic ridge to form a new lithospheric crust. Volcanoes are present in this kind of boundary. The magma may erupt to form volcanoes.
Divergence occurs mainly between oceanic crusts and continental crusts. The moving apart of the plates causes an exposure of the aesthenosphere semi liquid rocks to the surface . The up welling of this rocks result to formation of new crust, stretching the Lithosphere in the process.
The picture above illustrate diverging plates.
5. After a signal is transmitted from the eyes through the optic nerve, which part of the brain processes the
visual information?
L
A. The frontal lobe
B. The occipital lobe
C. The limbic lobe
D. The temporal lobe
Answer: B. The occipital lobe
Which of the following astronomical units is closest to the distance of the earth to the sun?
A. 9.5 AU
B. 9.1 AU
C. 3.7 AU
D. 1 AU
Answer is: D. 1AU
The correct answer is D. 1 AU
Explanation:
In astronomy, the distance from Earth to the Sun that is also used to measure the distance from the sun to other planets or any other elements in the space is known as AU or Astronomical Unit, this covers around 150 million kilometers and is one of the most used units especially to describe the distance of objects in our solar system. This also implies 1AU refers to the distance of the Earth to the Sun; although the distance varies slightly depending on the position of the Earth in the orbit. Therefore, the unit that is closest to the distance of the Earth to the sun is 1 AU.
1AU is the astronomical units closest to the distance of the earth to the sun.
Below is the mean distance from sun to each planet in Astronomical unit (AU)
Earth: 1.000 AU Jupiter: 5.203 AU Mercury: 0.387 AU Venus: 0.723 AU Uranus: 19.201 AU Neptune: 30.047 AU Mars: 1.524 AU Saturn: 9.582 AU Further ExplanationThe Astronomical unit, AU is the means distance from the earth to the sun. Actually, the distances between from the earth and the sun varies and primarily depend on the time of the year. This is simply because the earth orbit within the sun is certainly not a perfect circle. The astronomical distance is about 93 million miles.
The distances within the solar system are measured in Astronomical units (AU). The innermost planet, mercury has a mean distance of approximately 0.4 AU to the sun. Also, Neptune, one of the known distant planets has a radius of approximately 30 AU. However, the parsec is used to express the distance the Interstellar and intergalactic.
The first month, January is the time that the earth is closest to the sun and far away from in July. In January the distance from the earth to the sun is about 0.983 AU and the mean or average distance from the earth to the sun is approximately 1.017 AU in July.
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astronomical unitsaumercurysunearthdistanceWhich statement best explains why obsidian has a smooth glassy surface but basalt has a rough surface? Obsidian is formed due to compaction and basalt is formed due to weathering. Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt. Basalt is more easily eroded than obsidian because it is formed at a lower temperature than obsidian. Basalt is formed from the erosion of sediments and obsidian is formed due to the metamorphosis of rocks.
Answer:
Obsidian allows less crystal growth than basalt because it cools more rapidly than basalt.
Explanation:
Both Obsidian and Basalts are igneous rocks. Igneous rocks from the solidification and cooling of magma.
The textures of igneous rocks relies mostly on their mode of formation. Igneous texture refers to the way minerals are formed and arranged in rocks.
When magma forms and cools rapidly, crystals of minerals don't have time to grow. This leads to the formation of a rock that would look like glass. An example of such rock is Obisdian. Obsidian's glassy and smooth texture is as a result of the way it was formed. This rock type is an extrusive igneous rock that forms on the surface where cooling magma solidifies rapidly and crystals have little to no time to solidify.
Basalt on the other hand is an extrusive igneous rock. The mineral grains here have some ample time to form. Basalt is made of mafic minerals which impacts some very interesting textures on the rock mass. The texture of a typical basalt is fine grained and the minerals can be seen when magnified. Cooling is not as rapid during the formation of basalts compared to obsidian.
Answer:
it is b
Explanation:
(c)Why was no starch found in:(i)the part of the leaf labelled A......................................................................................................................................................................................................................................................(1)(ii)the part of the leaf labelled B?......................................................................................................................................................................................................................................................(1)(Total 7 marks)Q3.A plant with variegated (two-coloured) leaves was left in sunlight for several hours. Pieces of one of its leaves were then detached (removed) and tested for sugar. The diagram below shows the results.Explain, as fully as you can, why the yellow region of the leaf had not produced sugar
Answer:
During photosynthesis a plant absorbs light energy using the pigment chlorophyll. This allows it to convert carbon dioxide and water into glucose. This glucose is:
transported to the growing parts of the plant for use in respiration
transformed into cellulose, proteins and oils
turned into starch for storage
Therefore, to test if a plant has been photosynthesising, you can test the leaf to see if starch is present.
Bases form hydrogen ions (H+) when dissolved in water
True or False.
Hurry plz!!!
Answer:
Bases form hydrogen ions (H+) when dissolved in water - False
Bases in chemistry are substances that acquire hydrogen ions or donate the valence electron.
The given statement is False.
Bases are substances when dissolved in water will give hydroxide ions (OH-). For example: Potassium hydroxide(KOH), Sodium hydroxide (NaOH)Acids are substances when dissolved in water will give hydrogen ions (H+) ions. For example: Hydrocholric acid (HCl), Sulfuric acid.Therefore, Bases does not form hydrogen ion when dissolved in water.
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Which stage is the last stage of speciation?
The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
The populations are isolated and thus do not interbreed.
The populations become totally separated from one another.
The populations interbreed successfully.
Answer:
The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
Speciation is the evolution of one species into two different kinds, and when they become isolated, that is the final step, since they cannot interbreed any longer.
Answer: The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.
Explanation:
Speciation is a process of development of new species from the parent species. This occurs when the members of the population get separated due to geographical barriers such as river, mountains and others. Or if the members of the same species diverge on the basis of morphological, physiological, reproductive and behavioral changes.
The isolated members in the end in the cases of geographical separation becomes diverge or different species as they cannot interbreed with the members of the parent species due to the adaptations according to the new environment.
_was a key technique used to explain the structure of DNA
Answer:
X-ray crystallography
Explanation:
Its was a key technique to study and explain the structure of DNA based on X-ray shot's pattern, which was formed when these shots passed through the crystal of particular substance. This pattern provided information about molecular structure of DNA.
X-ray crystallography involves aiming X-rays at a crystal to generate a diffraction pattern, which is used to determine the 3D structure of a molecule. This technique was critical in discovering the double helix structure of DNA.
X-ray Crystallography and the Structure of DNA
X-ray crystallography was a key technique used to explain the structure of DNA. X-ray Crystallography involves aiming X-rays at a crystal containing many identical molecules.The X-rays scatter off the crystal and are collected on a detector, forming a diffraction pattern.This pattern is analyzed using mathematical methods to determine the three-dimensional structure of the molecule.Watson and Crick used X-ray crystallography data from Rosalind Franklin to elucidate the double helix structure of DNA.This method allows scientists to view molecules at an atomic level, making it integral for understanding complex biological structures.Complete question:
_was a key technique used to explain the structure of DNA
A. NMR spectroscopy
B. Electron diffraction
C. X-ray crystallography
D. Electron microscopy
What is a quantitative observation?
Answer:
things that you can use numbers to express
Explanation:
in which trimester do the bony parts of the skeleton begin to form
A. First
B. Second
C. Third
D. None of the above
Answer:
B. Second
Explanation:
In the second trimester the bony parts of the skeleton begin to form .
Answer:
A. First Trimester
Explanation:
Which structure fuses to form a diploid zygote during sex reproduction
In sexual reproduction, a diploid zygote is formed by the fusion of two structures: a haploid egg and a haploid sperm. These cells, also known as gametes, each contain one set of chromosomes, and their fusion results in a zygote with a complete diploid set of chromosomes.
Explanation:In sexual reproduction, the structures that fuse to form a diploid zygote are the haploid egg and the haploid sperm cells. These cells are also referred to as gametes. Each of these gametes is haploid, meaning they contain one set of chromosomes in their nuclei. The zygote, which is the cell that results after the fusion of these gametes, is diploid and contains two sets of chromosomes. For example, in animals, sexually reproducing adults form these haploid gametes from diploid germ cells. The fusion of these gametes gives rise to a fertilized egg cell, or zygote.
This process of fusion, called fertilization, ensures that the offspring has a complete diploid set of chromosomes. Later, the zygote will undergo multiple rounds of mitosis to produce a multicellular offspring, which is genetically unique.
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The structures that fuse to form a diploid zygote during sexual reproduction are the haploid egg and sperm cells. They fuse together during fertilization to create a new individual with a complete set of chromosomes.
Explanation:The structure that fuses to form a diploid zygote during sexual reproduction is the haploid gametes, specifically the egg and sperm. In this process, the haploid sperm and egg cells fuse, leading to the formation of a diploid zygote. The diploid zygote contains the combined genetic material from both parents, which is vital for creating a new individual. To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. This fusion of gametes is called fertilization.
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how does animals store energy
Animals ( or plants ) store solar energy as chemical energy between atoms of their molecules.
For example : ATP is phosphate energy bonds stored by animals in their molecules.
For more stable form animals also store energy in carbon bonds called carbohydrates. The most common e carbohydrates are starch, sugar and fats. Animals have enzymes to convert these forms of energy into actual form which they use for their activities like move, run or fly.
7. The role of an organism in the ecosystem is called its
Answer: The role of an organism in the ecosystem is called its NICHE.
Explanation: The niche (pronounced 'neesh') of an organism is the specific function and purpose of the organism within its environment, ecosystem or food-web or food-chain.
Answer:
niche
Explanation:
Enzymes can be recycled.
True
False
The given statement is true. Enzymes can be recycled.
What are enzymes?The chemical reactions, or metabolism, of our bodies are sped up by proteins known as enzymes. While certain chemicals are broken down, others are generated. Everything that is alive contains enzymes.
Naturally, enzymes are produced by our bodies. However, enzymes are present in both food and manufactured commodities.
One of the most important jobs of enzymes is to aid with digestion. Digestion is the process by which food becomes a source of energy. For instance, enzymes are found in our saliva, pancreas, intestines, and stomach.
The proper environment is necessary for enzyme activity. Enzymes can alter their form if certain criteria.
Therefore, The given statement is true. Enzymes can be recycled.
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How are photosynthesis and cellular respiration related? (A)They are both ways of forming glucose molecules. (B) One forms glucose and the other breaks it down (C)They are both used during fermentation (D)Both processes require an input of sunlight
Answer:
the answer is B
Explanation:
One forms glucose and the other breaks it down.
Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.Respiration is the chemical process by which organic compounds release energy.What is energy?
Energy is defined as the ability to do work which for biology purposes, can be thought of as the ability to cause some kind of change.
Energy can take many different forms:
Light EnergyHeat Energy Electrical energy,Mechanical Energy, Electrical Energy,Sound Energy.Hence, B option is correct.
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Cells use _____ to get energy only when carbohydrates are not available. hormones nucleic acids proteins lipids
Answer:
Cells use lipids to get energy only when carbohydrates are not available.
lipids hope this will help you
During transcription, mRNA is produced from the antisense strand of DNA. This means that the mRNA will match the
During transcription, mRNA is synthesized using the antisense strand of DNA as a template, resulting in an mRNA sequence that matches the sense strand of DNA, with uracil (U) replacing thymine (T).
During the process of transcription, the mRNA is synthesized using the antisense strand of DNA as a template. This results in the mRNA sequence matching the sequence of the sense strand of DNA, with the exception that uracil (U) is incorporated in place of thymine (T). Therefore, the correct answer is:
A. Sense strand of DNA, substituting uracil for thymine.The sense strand of DNA is also known as the coding strand because its nucleotide sequence corresponds to the codons that are translated into protein. During transcription, the mRNA synthesized is indeed complementary to the antisense strand, which is the template strand, and matches the sense strand except that uracil replaces thymine.
CAM plants lose their _____ during the day and open them at night.
a) thylakoids
b)chloroplasts
c)vascular bundles
d)stomata
Answer:
d) stomata
Explanation:
CAM plants lose their stomata during the day and open them at night.
Therefore, CAM plants do not lose thylakoids, chloroplasts, or vascular bundles during the day and open them at night.
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(more than one answers)
how do humans get the nitrogen that they need ?
Answer: Humans get the nitrogen they need by eating plants or other animals that contain nitrogen.
Explanation: When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.
Nitrogen is one of the essential component for human body as it helps in protein synthesis by getting involved in amino acid formation. Human gets nitrogen either from environment or through nitrogen-rich diet.
What is the necessity of nitrogen in human body?All tissues in the human body require nitrogen as an essential component.
it helps in making proteins in the muscles, skin, blood, hair, nails as well as DNA.
Human obtains protein through atmosphere as it comprises of 80% nitrogen as well as from diet.
Thus, it can be concluded that these are the sources of nitrogen for human beings.
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Why was a second control group was included in this experiment
Answer:
uhhh we need more info
Explanation:
Someone is sniffing near Grumpy’s front door. Can you help Grumpy identify the Ragdoll in this picture!
(Sorry if I chose the wrong subject, I don’t know what the subject of this question is)
Answer:
D
Explanation:
If you look up pictures of a Ragdoll cat, you'll see that they have blue eyes and the answer choice D is the only cat with blue eyes.
Answer:
The correct answer is option D.
Explanation:
The ragdoll is a breed of cats. This breed has blue eyes and a colorpoint coat with semi-long hair and large in size. They are known for their placid temperament and affection.
Grumpy can identify ragdoll cat by its physical properties and blue color eye. In option D the cat has blue eyes, semi-long hair and larger in size.
Thus, the correct answer is option D.
the exchange of genetic materials between homologous chromosomes is called
a.synapsis
b. chiasmata
c.heterozygous
d. homozygous
Heat is transferred to the Earth's surface through the process of...
conduction
convection
radiation
reflection
Answer:
conduction is a correct answer.
Explanation:
Heat is transferred by three ways:
Conduction
Convection
Radiation
Conduction:
heat is transferred by the collisions which occur between the neighboring molecules. it occurs in the liquid and solids stage in which molecules are close to each other.Heat is transfer from the area of high heat to the area of low heat through direct contact. The molecules which are warmer they vibrate and collide with the molecules nearby and they transfer the energy.Heat is transferred to the Earth's surface through the process of Conduction,since air is not a good conductor, so most of the energy near Earth's surface is transfer by the conduction.
.
Answer:
The answer is C.) radiation.
Explanation:
Conduction involves two objects touching, convection is the motion of energy moving in a circular motion, and reflection is the motion of something reflecting off of another object. Radiation is the correct answer.
a molecule that serves to make reactions work
11. In a long bone, such as the femur in the leg, the center of the bone contains which substance, responsible for producing blood
cells?
O A. Plasma
B. Ligaments
C. Marrow
O D. Synovial fluid
In a long bone, such as the femur in the leg, the center of the bone contains Marrow, responsible for producing blood cells.
What is Bone marrow?
The spongy material called bone marrow is located in the middle of the bones. It produces things like bone marrow stem cells, which go on to make blood cells.
Each type of blood cell that the bone marrow produces performs a crucial function.
Bone marrow stem cells is the blood that circulates in the veins and arteries of all normal people. These stem cells are known as peripheral blood stem cells (PBSC). Patients recovering from chemotherapy and healthy people who are treated with certain drugs that stimulate the growth of the bone marrow have relatively large numbers of PBSC in their blood.
Therefore, In a long bone, such as the femur in the leg, the center of the bone contains Marrow, responsible for producing blood cells.
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A colorimeter is an instrument used for chemical analysis by comparing a liquid’s color with standard colors. In an experiment, a scientist used two colorimeters and noted the readings. The first colorimeter showed consistent readings that were five points lower than the actual reading. The second colorimeter provided readings that were the same as the actual reading. Which two statements are implications of these readings?
The first colorimeter is reliable but not valid.
The second colorimeter is valid and reliable.
Both the colorimeters are reliable and valid.
The readings of the first colorimeter can be used without repeating the experiment.
The readings of the second colorimeter aren’t reliable and can’t be used for the experiment.
Answer:
The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.
Explanation:
The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.
Answer:
Answer:
The correct statements are that the first calorimeter is reliable but not valid, and the second calorimeter is valid and reliable.
Explanation:
The first calorimeter is reliable as the reading demonstrated by it is similar when each time the experiment is performed, however, the result attained is not correct, though it is reliable. On the other hand, the second calorimeter is both reliable and valid, as it is demonstrating the accurate results from time to time. This is valid as it is providing a similar result as that of the original readings.
Explanation:
Where in the cell does translation occur? the cytoplasm the promoter the nucleus the DNA
Answer:
The Cytoplasm is definitely the answer.
Explanation: