Answer:
d.
Explanation:
The independent variable in an experiment is the variable that is manipulated to test a hypothesis. In this case, that is caffeine. In order to study the effects, they have to give different amounts to spiders
The independent variable in an experiment testing if caffeine affects the way common house spiders build webs is the amount of caffeine the house spiders receive. The correct option is b.
What is variable?In science and research, a variable is any factor or condition that can be measured, controlled, or manipulated.
The independent variable is the variable that the researcher manipulates or changes in order to observe its effect on the dependent variable.
In this case, the researcher is interested in the effect of caffeine on the way house spiders build webs, so the amount of caffeine that the spiders receive is the independent variable.
The other options, such as the number of house spiders, the amount of food, or the body mass of the spiders, are not being intentionally manipulated in this experiment and therefore are not the independent variable.
Thus, the correct option is b.
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The birds wings are homologous to a(n)
-A fish’s tail fin
-Alligator’s claws
-Dogs front legs
-A mosquito’s wings
compare light and electron microscope
See the attached file!!!!
2. Why does Grover Norquist disagree with Reihl's statement? [class is eco-fe]
Can someone help me fill in this chart please?
Monomer
-Carbs : monosaccharide
-Lipids: glycerol & fatty acids
-Protiens: amino acids
-Nucleic Acid: nucleotide
Polymer
-Carbs: polysaccharide
-Lipids: same as monomer
-Proteins: protein/polypeptide chain
-Nucleic Acid: nucleic acid (DNA)
CHONP
-Carbs: CHO
-Lipids: CHO
-Protiens: CHON
-Nucleic Acid: CHONP
Function/Purpose
- Carbs: body's primary source of energy
-Lipids: energy source (long term), cell membranes, hormones
-Protiens: needed for growth and restoration
-Nucleic Acid: Genetic information storage and protein synthesis
Examples
- Carbs: starches, cellulose
- Lipids: oil, wax, fat
- Protein: muscle, hair, nails, enzymes
- Nucleic Acids: DNA, RNA
describe the relationship between water velocity and water loss
Answer:
If the water velocity decreases, the rate of erosion increases.
A scientist on a field trip in the amazon basin is observing an animal swinging from branch to branch high up in the forest canopy. she believes it belongs to the family of primates. what characteristics would she most likely expect the animal to have that would help it to survive in its environment? select three correct answers. a. the animal has a long snout to better smell its prey and webbed hands and feet for swimming. b. the animal's eyes face forward with overlapping fields of view, providing a three-dimensional view and accurate judging of distance. c. the animal has long flexible arms and a prehensile tail that help it swing from branch to branch. d. the animal has five flexible fingers and toes, and an opposable thumb and big toe, all used for grasping tree branches and food items, such as fruits, leaves, and seeds.
The primate family characterizes by having long arms they use to move, an improved visual system, 5 fingers, and prehensile capability. Options B, C and D.
What are the primates' morphological characteristics?
Primates characterize as having an elongated head that culminates in the snout.
They are pentadactyl, meaning that they have five fingers in their hands and feet. Their thumbs are opposable, providing the animal the prehensile capacity.
Their visual system tends to face both eyes to the front and see in colors, characteristics that improve their sight, as primates rely little on their smell sense and much on their sight.
They are quadrupeds with a svelte body and soft hair. Their tail is long. They move from tree to tree by making use of their extremities. They have a dental comb to clean themselves and others.
They are herbivorous frugivorous.
The three correct answers are,
b. the animal's eyes face forward with overlapping fields of view, providing a three-dimensional view and accurate judging of distance.
c. the animal has long flexible arms and a prehensile tail that help it swing from branch to branch.
d. the animal has five flexible fingers and toes, and an opposable thumb and big toe, all used for grasping tree branches and food items, such as fruits, leaves, and seeds.
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1. (b) Where does the light independent phase of photosynthesis occur?
Explanation:
The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose. The chloroplast's own genetic material (separate from that of the cell) is also stored in the stroma.
Which choice best describes how DNA fingerprinting has improved the identification of organisms?
A.Scientists can identify which genes are connected to specific adaptations.
B.DNA sequences are unique for each species and can be directly compared.
C. Most organisms share the vast majority of their DNA.
D.An organism's DNA is constantly changing.
Environments include both _____ and _____ things.
Question 1 options:
resources; factors
air; water
living; nonliving
buildings; animals
How does noise affect a signal?
Explanation:
Noise is an unwanted signal which interferes with the original message signal and corrupts the parameters of the message signal. This alteration in the communication process, leads to the message getting altered. It is most likely to be entered at the channel or the receiver.
When does the amount of photochemical smog peak?
a. dawn
b. midday
c. twilight
d. night
From what ive found it is morning and afternoon so I have no idea what to choose
What is the connection between genetics and natural selection?.
4. Why isn't all the energy transferred by sunlight available to plants?
Which are characteristics of bryophytes? (Select all that apply.)
□ Most of them grow tall.
□ Most of them are vascular plants.
□ Most of them live in shady, moist, or humid areas.
□ Most of them need water to help reproduce.
Answer:
Explanation:
there u go
Which example is indirect evidence used to study Earth’s interior?
composition of minerals in a rock
age of a rock from within Earth
location of an earthquake’s epicenter
texture of different core samples
Answer:
location of an earthquake’s epicenter
An indirect evidence is one which is used to infer or support the clause. The location of an earthquake’s epicenter can be used to study Earth’s interior.
Three main layers make up the Earth. The crust, mantle, and core are those. Additionally, since the earth's interior cannot be directly studied, the composition of rocks can be understood from direct evidence.
Seismic waves aid in comprehending circumstantial evidence. The energy that passes through the various layers of the earth is carried by seismic waves. Landslides, earthquakes, and volcanoes are some of the causes. The direction of the seismic wave, as well as the location of the earth's epicenter, can be determined by analyzing several seismographs.
Therefore, studying the location of an earthquake’s epicenter would give an idea of Earth’s interior. The correct answer is option C.
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If the genotype is heterozygous, what is the expressed phenotype?
Rr
dominant
recessive
RR
a group of dead organism gets covered by mud. over long periods, they become fossil fuels. which statement correctly describes how carbon moves in this scenario?
carbon moves from the atmosphere to the geosphere.
carbon moves from the atmosphere to the hydrosphere.
carbon moves from the biosphere to the geosphere.
carbon moves from the biosphere to the hydrosphere.
Carbon moves from the biosphere to the geosphere is the correct statement.
How carbon moves in this scenario?
Carbon moves from the biosphere to the geosphere because the dead organism has carbon in its body and when it is decomposed the carbon goes into the soil.
So we can conclude that carbon moves from the biosphere to the geosphere is the correct statement.
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state five qualities of good draught animals. State four precautions to be observed when using draught animals
Answer:
1. Conformation
Conformation refers to the form or shape of an animal. An animal with good conformation has a shape which shows the normal characteristics of its species and breed.
An animal used for draft must have a build well suited for pulling. It should be low to the ground, have powerful shoulders and legs, and have a broad frontal dimension that will accommodate the placement of a harness. It must be big enough to deliver, alone or in a pair, the power needed to pull equipment for an extended period of time. It must also be able to exert the concentrated or "instantaneous" effort needed to overcome temporary increases in the draft requirement caused by roots, rocks, hard soil, or inclines.
While some animals are bred to produce good draft abilities, within any breed individual animals vary greatly in these qualities, and care must be taken to choose those with the most potential. A thin but well-balanced animal can be strengthened with a good diet, health care, and work. However, an animal with a swayback, bad legs or impaired vision will be a constant source of trouble.
Selection is a process of matching ideal qualities against those seen or latent in a given animal. Good draft animals, regardless of species or breed, will have the following qualities:
• head well proportioned; squarish, sculptured look
• balanced vision and hearing; head carriage high and straight
• normal mouth; good teeth and jaw structure
• body should have depth and width; short, full neck, full shoulders, broad chest, and straight, broad beck
• wide, thick hindquarters, lowset and evenly-fleshed
• short legs, straight and square to the body; ample bone
• clean, well-developed joints; no swelling or unusual boniness; no turning in or out of knees or hoofs; free movement of limbs
• feet straight, hard; normal angulation of hoof.
Temperament
Temperament refers to the nature or disposition of an animal. Part of its temperament is determined genetically, both by breed and parentage; some of it is learned-a response to the treatment it receives from other animals or the people who raise and handle it.
Temperament is reflected in an animal's behavior, the way it moves and acts, and the way it reacts to the things around it. It is difficult to know much about temperament from the quick evaluation that usually precedes the purchase of a draft animal. The buyer must guess, from what is observable, whether or not an animal will accept new routines or maintenance and training, behave well in a pair, and prove to be a spirited yet steady-paced and manageable worker. Sometimes, what is observable is not typical of the animal's behavior. A basically lethargic bull, for example, may become very alert or nervous at the approach of a stranger, exhibiting a fierceness that could be misinterpreted as a strong yet controllable spirit. A donkey that is mishandled and mismanaged might kick or butt at its owner, or at any adult, but be led away quite easily by a child. The buyer must be aware of such possibilities and at the same time drew some basic conclusions about the animal's temperament.
The following are signs of good temperament:
• Good overall conformation and health. The animal has no physical handicaps that require it to compensate with aggressive or stubborn behavior. An animal with bad vision or hearing, an unsound leg or joint, or with a chronic respiratory or muscular weakness, protects itself by balking, spooking, shying, refusing to be harnessed or lying down during work. Its temperament is affected or shaped by its physical condition.
• The animal accepts the handling of the owner. The owner can pick up the animal's foot, open its mouth, lead it with a rope without having to use force or harsh measures.
• It does not shy or kick at other animals. The buyer should try to be present when it is being turned out with a herd or put into a corral with other animals. If an animal is unusually aggressive or cowardly, it may not work well in a pair. Aggressive animals force their work-mates to shy or lean out of the yoke or harness, while cowardly animals may refuse to step evenly with their mates, lagging behind.
When an animal is taken from its herd or original owner and staked out or corralled in a new place, it may experience shock. The animal may show signs of aggression, withdrawal, stubbornness, fear, or general anxiety. None of these reactions is unnatural during the adjustment period, and should not be taken as a sign of an unsuitable disposition. An animal's character becomes clear later, during training and preseason work. At that time the farmer can judge the ability of the animal to work as part of a pair or team. Buying an animal early in the offseason allows the owner time to seek a replacement should a problem arise.
Excretion and the Kidneys The kidneys remove excess water, minerals, and other waste products from the blood. The cleansed blood returns to circulation. Each kidney has nearly a million processing units called nephrons. Filtration and reabsorption occur in the nephrons.
- Filtration is the passage of a fluid or gas through a filter to remove wastes. The filtration of blood in the nephron takes place in the glomerulus, a small, dense network of capillaries. Each glomerulus is encased by a cuplike structure called Bowman's capsule. Pressure in the capillaries forces fluids and wastes from the blood into Bowman's capsule. This fluid is called filtrate.
- Most of the material that enters Bowman's capsule is returned to circulation. The process by which water and dissolved substances are taken back into the blood is called reabsorption.
- A section of the nephron tubule, called the loop of Henle, conserves water and minimizes the volume of filtrate. The fluid that remains in the tubule is called urine.
For Questions 7-10, write True if the statement is true. If the statement is false, change the underlined word or words to make the statement true.
____________7. Each kidney has nearly a million individual processing units called capillaries.
Each kidney has nearly a million individual processing units called capillaries is false as the units are called nephrons.
What are the nephrons?
Nephron, processing unit of the kidney, the shape that certainly produces urine withinside the procedure of doing away with waste and extra materials from the blood.
The nephrons paintings via a two-step procedure: the glomerulus filters your blood, and the tubule returns wanted materials for your blood and eliminates wastes. Each nephron has a glomerulus to clear out out your blood and a tubule that returns wanted materials for your blood and pulls out extra wastes.
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how is a leopard frog like a human?
Answer: They scream when being killed
Explanation:
Leopard frogs (genus Lithobates) and humans (Homo sapiens) are both living organisms and share certain characteristics as part of the animal kingdom.
Few points of comparison between leopard frogs and humans:
1. Classification: Leopard frogs and human beings are both considered to be vertebrates, which means they both have a backbone and are within the phylum Chordata.
2. Body Structure: Both leopard frogs and humans have a bilateral symmetry, meaning their bodies can be divided into two equal halves.
3. Sensory Organs: Both have sensory organs such as eyes, ears, and a sense of touch, allowing them to perceive their environment.
4. Reproduction: Both reproduce sexually, with males and females coming together to produce offspring.
5. Respiration: Humans and leopard frogs both have a respiratory mechanism that enables oxygen inhalation and carbon dioxide exhalation. However, the two species' unique respiratory structures and systems are different.
6. Homeostasis: Leopard frogs and human beings both work to keep their internal environments in balance and homeostasis by controlling things like body temperature, pH levels, and metabolic activities.
Thus, similarities are seen in their body structure, sensory organ, reproduction, respiration, and Homeostasis.
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If the mass of an object increases, what also increases
Answer:
The force does too
Explanation:
From the universal law of gravitation, F ∝ m1m. Since force is directly proportional to mass, if the mass of either of the object increases, the force also increases.
Why is there a conflict between oil palm farming and orangutans?
Answer:
The Oil can be unsustainable to animals
Explanation:
Basically, it affects the orangutans because where that oil grows is where they live and they are currently facing extinction.
3. (b) How does crossing over increase the variation in the gametes (and hence the offspring)?
Answer:
During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material. Gametes gain the ability to be genetically different from their neighboring gametes after crossing over occurs.
What happens during glycolysis? A. Hydrogen is removed from water. B. Carbon dioxide is produced. C. Glucose is split into two molecules of pyruvic acid.
Answer:
I'm pretty sure its C. Glucose is split into two molecules of pyruvic acid
does anybody here know how to edit two pictures into one?
Answer:
possibly depending on what you want
Explanation:
Which of the following best describes an example of a community experiencing secondary succession? View Available Hint(s)for Part A This community is located within the rubble recently left by a retreating glacier. This community is on an exposed rock and consists of lichens and mosses that are the primary photosynthesizers in this system. This community consists of pioneer plant species that are altering soil properties. This community of grasses began growing after a fire killed the trees and shrubs previously at this site.
The option that best describes a community experiencing secondary succession is : ( D )This community of grasses began growing after a fire killed the trees and shrubs previously at this site
What is secondary succession ?Secondary succession is the recolonization of a habitat by living organisms such as plants and animals after the habitat had experienced a major disaster such as flood or massive fire. Because The pioneer plants and animals might have been displaced or destroyed during the major disaster.
Hence we can conclude that The option that best describes a community experiencing secondary succession is This community of grasses began growing after a fire killed the trees and shrubs previously at this site.
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A trait has two alleles represented by p and q. If p=0.22 what is q
Answer:
0.78
Explanation:
By using the Hardy-Weinberg equation.
Help will give brainilist
Answer:
mass
orbit
pounds
Explanation:
difference between accomodation and pupil reflex?
Answer:
The pupillary light reflex compensates for changes in illumination level, whereas the accommodation responses compensate for changes in eye-to-object-viewed distance.
Explanation:
Hope this helped!
In the human life cycle
What's the rest of the question so I can answer it
Explanation:
hurry and type the rest out pls