Answer:
The living things are characterized by seven factors which includes movement, metabolism, respiration, sensitivity, growth, Excretion, nutrition and reproduction. The characteristics which indicates life in given items are as follows:
1. A candle flame: When we light the candle, the size of the flame is small and it grows as the wax melts.
2. Balloon floating in the air: As the balloon is floating it shows movement.
3. Bubbles blown from a bubble wand: It shows growth as well as movement.
The characteristic that shows that they are not alive include none of the three items performs excretion, metabolism and they are not made up of cell.
Though a candle flame, a balloon, and bubbles show some life characteristics like response to environment and growth, they lack the essential traits of life like reproduction, evolution, homeostasis, and the presence of cell structure. Therefore, these objects are not considered alive.
Explanation:When considering the items in question: a candle flame, a floating balloon, and bubbles blown from a wand, it's important to understand the key characteristics of life: order, sensitivity or response to the environment, reproduction, adaptation, growth and development, regulation/homeostasis, energy processing, and evolution. All these attributes together define life.
An evident characteristic representing life in these items could be the response to stimuli or the environment. For instance, a candle flame flickers responding to the air currents, a balloon floats as it is filled with helium, showing adaptation to the surrounding air density, and bubbles show growth as they are blown larger from the wand. These are aspects of sensitivity to environment and growth.
However, the noted objects are nonliving as they lack the majority of life's crucial traits. They don't reproduce, evolve over time, or maintain homeostasis on their own. Neither do they have cell structure - a fundamental trait of life. Hence, these objects are not considered alive despite their adaptability and responses to changes in the environment.
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When a honey bee stings or a pathogen attacks, the body elicits an inflammatory response. Label the processes that happen during an inflammatory response.
Answer:
Honey bee or pathogen attacks by penetrating chemical components in the body, eliciting inflammation.
Explanation:
Honey bee stings with the barbed stinger located at the end of its abdomen which penetrates the skin in order to inject the venom from his venom sac consisted of organic molecules and proteins. This can cause pain, swelling and inflammation.
The methanoic acid in its venom causes the inflammation. Pathogens penetrate mechanical components in plants that affect the mechanisms of the plant.
Which two characteristics describe all animals?
Answer:
Heterotrophic and Multicellular
Explanation:
Answer: Multicellular and Eukaryotic
please give me brainliest if i was right
Which kingdom does not classify autotrophic organisms?
Archaea
Eubacteria
Fungi
Protista
Answer:
Fungi, it's the only one that's not microscopic
Fungi, it's the only one that's not microscopic.
What are Autotrophic organisms?An organism that can make its own nourishment by the use of light, water, carbon dioxide, or other substances is an autotroph. Autotrophs are also referred to as producers because they make their own nourishment.
Although plants are the most well-known autotroph, there are numerous more types of autotrophic creatures. Algae, which are aquatic plants that are recognized by their larger forms as seaweed, are autotrophic.
The majority of autotrophs produce their food through a process known as photosynthesis. In photosynthesis, autotrophs use the sun's energy to turn carbon dioxide from the air and water from the soil into glucose, a nutrition.
Therefore, Fungi, it's the only one that's not microscopic.
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which of the following sentences is the best example of a hypothesis
a. UV radiation does not cause skin cancer.
b. chickens lay more eggs when they are happy.
c. why does the earth orbit around the sun?
d. how many types of organisms are there?
Answer:B
Explanation:
when i was in middle school they told us an hypothesis was an educated guess/outcome.
Answer:a
Explanation:I got it wrong on a test and then it showed what the answer was I listened to the other person on here but got it wrong
What human body system sends signals to glands in the endocrine system to release hormones?
A. circulatory system
B. excretory system
C. nervous system
D. digestive system
Answer:
a
Explanation:
Is solar energy an ecosystem service? why or why not
Answer:
Yes
Explanation:
It is using the sun's energy as an energy resource and is therefore eco friendly
Answer:This is because they are producers and other organisms gain energy from them. Solar energy plays a very vital role here, because the process of photosynthesis, which takes place in plants, is incomplete without solar energy. Therefore, we can say it is an ecosystem service.
a molecule is the smallest part of what?
Answer:
A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
Explanation:
A molecule is the smallest part of a substance that can have the properties of that substance.
What is a molecule?A structure by the chemical bonding of two or more two atoms is called a molecule. The molecule is the smallest part of a substance that has the same properties as a substance.
For example, a molecule of water had the same properties as that of water. If it is broken down into its constituent atoms, hydrogen and oxygen, these atoms will have completely different properties than that of water.
Molecules are structures that form the basics of the study of chemistry. Molecules are written with the symbol of their constituent atom with a number as a subscript representing the number of those atoms in the molecule.
For example, a molecule of water is represented by the formula H₂O, where H₂ represents that there are two atoms of hydrogen per atom of oxygen.
Therefore, the molecule is the smallest part of a substance that can have the properties of a substance.
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An atom of the element zinc has an atomic number of 30 and a mass number of 65. How many protons does an uncharged zinc atom have?
the element zinc has 30 protons
Explanation:
Atomic number is the sum of all the number of protons present in an element. And, mass number is the sum of total number of both protons and neutrons present in an element.
When an atom is neutral in nature then its number of protons is equal to its number of electrons.
Since, it is given that atomic number of zinc is 30 so, it means that number of protons will also be 30.
Thus, we can conclude that there are 30 protons in an uncharged zinc atom.
what type of material is found in the atmosphere?
A. A mixture of magma and superheated water.
B. An incompressible fluid of molten rock
C. Solid Rock
D. A viscoelastic fluid of molten rock
Answer: D.) A viscoelastic fluid of molten rock
Explanation: The layer below the lithosphere , the upper layer of the mantle of the earth with high heat pressure .It is made up of almost solid rocks but also flows not which indicates that it consist of viscoelastic fluid of molten rocks.This is because in some regions there can be presence of molten rocks.
6. Plants produce oxygen during photosynthesis. However, plants must also use atmospheric oxygen during the process of respiration.
Which can best bo concluded from this Information?
.. Plants undergo respiration through aerobic processes.
C. Plants use all of the oxygan they produce during respiration.
b. Plants undergo respiration through anaa robic processes.
d. Plants use the oxygen from carbon dioxide during respiration.
...
L
e
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Answer:
Plants use the oxygen from carbon dioxide during respiration.
What can Courtney change in her experiment to find the true impact of
the type of meals she eats on her race time?
Select one:
A. For two weeks of her study, she can eat her high protein meal
for breakfast and high carbohydrate meal for lunch; she should
then switch the meals for the last two weeks.
B. She should try running a longer distance after lunch since
she seems to be faster regardless of her meal. C.She should only eat her high protein meals for breakfast and
only eat her high carbohydrate meals for lunch for all four weeks
of her study. D. She should eat only protein meals on some days and only
carbohydrate meals on other days, which can be determined by a
coin toss.
Final answer:
Courtney should randomize her diet by eating only protein meals on some days and only carbohydrate meals on others based on a coin toss to truly understand the impact of meal type on her race performance.
Explanation:
To properly assess the impact of the type of meals on her race time, Courtney should implement a controlled experiment that isolates the variable of the meal composition. The best option here is:
Option D. She should eat only protein meals on some days and only carbohydrate meals on other days, which can be determined by a coin toss. This randomization will help minimize the effect of other variables and allow her to assess the true impact of meal type on race performance.By comparing her race times on days following a high-protein meal to days following a high-carbohydrate meal, she can see which diet might be more beneficial for her performance. It's essential to remember that many distance runners carb load before a race because carbohydrates are stored as glycogen in the muscles and liver, providing a ready source of energy for endurance activities. Eating complex carbohydrates is a common practice so that the body has stored energy to tap into during the run.
Describe the difference between negative and positive feedback mechanisms in
the body
a. Positive feedback increases the body's level of a variable while negative
feedback reduces the level of the variable
b. Positive feedback is good for the body and helps put the body back to homeostasis. Negative feedback occurs when there is a problem with the body
and it can't get back to homeostasis.
c. Negative feedback returns the body to its "normal" levels when it gets too high
or too low. Positive feedback continues to add to one side of the balance
making the change even greater.
d. Both negative and positive feedback loops work in the same way to help the
body maintain homeostasis.
Please only answer if you know the answer
Negative feedback helps achieve and maintain the set point within a system, acting as a control mechanism. In contrast, positive feedback lacks the controlling aspect and instead accelerates the direction of change. Hence, the correct option is c.
The primary difference between negative and positive feedback mechanisms in the body involves the system's response to changes. Negative feedback mechanisms work to maintain homeostasis by reversing the direction of a change when the levels of a variable become too high or too low. For example, the regulation of blood glucose levels through the release of insulin and glucagon is an instance of negative feedback: insulin lowers high blood glucose levels, while glucagon raises low blood glucose levels.
On the other hand, positive feedback mechanisms amplify the changes the system is undergoing, pushing it further away from its original state. These are less common because they could disrupt homeostasis, but they are normal and critical when there is a specific endpoint, such as during childbirth where the release of oxytocin intensifies contractions until delivery.
In short,
What is the role of the plasma membrane in facilitated diffusion & how is it different form osmosis?
Answer:
osmosis or diffusion. ... It is a process called facilitated diffusion. It could be simple as bringing in a glucose molecule. Since the cell membrane will not allow glucose to cross by diffusion, helpers are needed. Plasma , The primary function of the plasma membrane is to protect the cell from its surroundings.
Please select the word from the list that best fits the definition
apparent movement of a star used to measure its distance from Earth
parallax
light-year
main sequence
H-R diagram
white dwarf
fusion
elliptical galaxy
barred spiral galaxy
irregular galaxy
Milky Way Galaxy
Answer: parallax is the best answer
Answer:
The correct answer is the option 1: Parallax
Explanation:
Parallax is the name given, in the field of physics, to the term that refers to the alternation or displacement in the apparent position of an object that is being watched between two different lines of sight and being measured at the same time by the angle of those two lines. In addition, that statement declares the well known ''principle of parallax'', which is used by the astronomers to measure large distances, such as the example of the question of the apparent movement of a star used to measure its distance from the Earth.
which organism is NOT made up of 1or more eukaryotic cells?
A.) a dog
B.)dandelion
C.)radiolarian
D.)methanogen
Answer:
D
Explanation:
Methanogens are prokaryotes and therefore have prokaryotic cells. They are single-celled archaea. They are found in hypoxic conditions like the first stomach of ruminants where they digest molecules like cellulose and produce methane as a byproduct. The rest are composed of eukaryotic cells which are much larger than prokaryotic cells and their organelles are membrane-bound (unlike prokaryotes).
why do some molecules need help moving across a cell membrane in the form of energy
Answer:
Because that molecules are moving against a concentration gradient and they can not freely pass trough the membrane.
Explanation:
Cell membranes are constituded by lipid bilayers with an hidrophobic nature. This means that water or molecules disolved in water can not freely pass the membrane. All these molecules are in a bigger concentration outside the cell, so the transport inside cells will be against a concentration gradient and this type of transport requieres energy.
Some molecules need help to move through the cell membrane in the form of energy because transport occurs against the concentration gradient and, therefore, the molecules require an energy supply.
The transport in cells is carried out through their membrane by different mechanisms, in order to enter nutrients and eliminate waste.
Many molecules can pass through the membrane without difficulty, but there are others that, due to their composition, it is not easy to do so and therefore require an energy supply.
For this there is the active transport of molecules, it requires energy to be carried out, since it is a type of movement where molecules go against the concentration gradient (from a place of lower concentration to one of higher concentration) and it is carried out by means of pumps, a clear example is the pump that transports sodium and potassium.
If the cells were unable to carry out this transport, the organism would not carry out its vital activities.
Therefore, we can conclude that some molecules need energy to move across a cell membrane because they go against the concentration gradient.
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10 POINTS
If many experiments and ample evidence support a hypothesis, then it becomes a
theory.
True
Or
False
Answer:
True.
Explanation:
A hypothesis is a possible explanation to an unexplained situation that is based on limited or not enough evidence. Therefore, this explanation has not been proven.
If, through scientific experiments and research, enough evidence is gathered to prove this explanation to be true, then it becomes a theory. A scientific theory generally integrates various hypothesis to support it. This allows a theory to change through time as more hypothesis are developed, creating a more accurate and reliable theory.
Complete this sentence: The activities of enzymes depends on the __________, __________ conditions, and the __________ of the surroundings.
Answer:
The activities of enzyme depends on the temperature, ionic conditions and the pH of the surroundings.
Explanation:
Effect of temperature on enzymes
Enzymes show low level of functioning at lower temperatures. As the temperature is raised, the activity of the enzyme increases. The enzyme activity becomes optimal at a specific temperature. Beyond this temperature, the enzyme's activity rate starts to decline until it gets denatured.
Effect of ionic conditions on enzymes
Studies show that certain enzymes require some cations for functioning. But an increased amount of cations or anions can inhibit the functioning of the enzymes.
Effect of pH on enzymes
Each enzyme has an optimum pH at which it works best. If the pH is increased or lowered than this optimum pH, then the activity of the enzyme starts declining until it gets denatured. Most enzymes work best at pH 7.0
Which correctly describes a difference between the male and female
reproductive systems? A. Only females produce gametes
B. Males have a monthly cycle.
C. Only males are fertile.
D. Females produce gametes less often.
Answer:
Females produce gametes less often.
Explanation:
Females produce gametes less often.
The statement females produce gametes less often correctly describes a difference between the male and female reproductive systems.
What are the functions of reproductive system?The reproductive system of an organism, also known as the genital system, is the biological system made up of all the anatomical organs involved in sexual reproduction.
The tissues, glands, and organs involved in producing offspring (children). In women, the reproductive system includes the ovaries, the fallopian tubes, the uterus, the cervix, and the vagina.
The primary reproductive organs are the gonads, which produce the gametes and hormones. The secondary, or accessory, structures transport and sustain the gametes and nurture the developing offspring.
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a bacterial cell is 0.002 mm long. A magnified image of the cell is 18 mm long. What is the magnification?
The magnification of the bacterial cell image is 18 mm / 0.002 mm = 9000
What is the magnification?Magnification means how much bigger the image is compared to the object itself. In this situation, the picture of the tiny bacteria cell is zoomed in to be 9000 times bigger than it really is.
This means that if you were to use a microscope that makes things look 9000 times bigger, a bacterial cell would look like it is 18 mm long.
It is important to understand that making an image bigger does not make it clearer. Resolution means the skill to see the difference between two points that are very close together. To make an image clearer, use a microscope with a bigger number called numerical aperture (NA).
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how is physiology of a bone related to its anatomy
Bone physiology is intimately connected to its anatomy, as the structure of bones dictates their function in body support, protection, and movement. The continuous remodeling of bone as well as specific anatomical features, like the arrangement of hand bones, exemplify the form-function relationship.
Explanation:The physiology of a bone is deeply related to its anatomy because the physical structure of bone (its anatomy) determines how it functions (its physiology). Bones are not inert structures; they are dynamic and continuously remodeled throughout one's life to adapt to various stresses. Bone remodeling is a physiological process where approximately 10% of bone mass is turned over annually. This ongoing process helps the bone maintain its strength and adapt to the mechanical load it is subjected to.
Bone's structure is a composite of organic collagen and inorganic hydroxyapatite that provides the necessary strength to support body weight. The outer portion, called cortical bone, is dense, while the inner part, known as cancellous bone, is spongy. This specialized structure enables bones to perform their physiological functions, supporting body structures, protecting organs, and facilitating movement in conjunction with muscles.
Similarly, the anatomy of the human hand, with its unique arrangement of bones, reveals a close relationship with its function; the thumb's opposition to the four fingers allows for complex manipulations like pinching, grasping, and typing. Understanding the anatomy and physiology together enhances comprehension of how form and function are correlated in living organisms.
When listing the levels of organization in organisms from smallest to most complex which level is just below organs in complexity?
Describe the property of water that is indicated by the data. How is this property explained by the structure of water molecules and the bonds between them?
Water's cohesive property, which makes it stick together in drops, is due to its molecular structure that facilitates hydrogen bonding. The polarity of water molecules leads to the formation of hydrogen bonds, which makes water a structured liquid with high surface tension.
The Property of Cohesion in Water
The property of water indicated by the data is its cohesive nature. Water molecules exhibit a strong tendency to stick together, forming drops rather than existing as separate molecules. This behavior is most visible when observing water dripping from a leaky faucet or accumulating in dew drops.
The cohesive property of water is explained by the molecular structure of water, or H₂O. Each water molecule consists of one oxygen atom covalently bonded to two hydrogen atoms, creating a polar molecule with a partial negative charge on the oxygen and partial positive charges on the hydrogens. This polarity allows water molecules to form hydrogen bonds with each other, where the oxygen of one water molecule attracts the hydrogen of another. These bonds create a network that holds the molecules together, contributing to water's high surface tension and its ability to form drops.
Hydrogen Bonding in Water
Hydrogen bonding is the molecular structural feature responsible for many of water's unusual properties. The bond is relatively weak on its own, but when many hydrogen bonds form between water molecules, they collectively create a stable, structured liquid. This extensive hydrogen bonding is what gives water a high boiling point, high heat capacity, and the ability to dissolve numerous substances, which is why water is often called the 'universal solvent'.
In essence, the structure of water molecules and the network of hydrogen bonds between them are the keys to understanding why water behaves in such distinctive ways compared to other molecules of similar size.
How does the angle of sunlight affect the climate of each of the climate zones?
Sunlight angle shapes climate zones: shallow angles cause cold polar climates, varying angles lead to temperate fluctuations, direct angles create tropical heat, and changing angles result in arid extremes.
The angle of sunlight significantly influences the climate of each climate zone. In polar zones, where the angle is shallow, sunlight is spread over a larger area, resulting in lower temperatures. In temperate zones, varying angles across seasons cause temperature fluctuations. Near the equator, where sunlight strikes directly, tropical climates experience high temperatures.
Subtropical zones have consistent, intense sunlight, yielding warm climates. The angle's changing inclination in arid zones leads to extreme temperature shifts. Lastly, in high-altitude regions, steep angles result in cooler temperatures. Overall, sunlight angle affects the distribution of heat, playing a pivotal role in determining the temperature and characteristics of each climate zone.
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Final answer:
The angle at which sunlight strikes Earth, influenced by its 23.5-degree axial tilt, results in the differing climate zones across the globe. Direct sunlight near the equator leads to a warmer climate, while increased reflection near the poles causes cooler conditions.
Explanation:
The angle of sunlight plays a critical role in shaping the climate of various zones on Earth. The Earth's 23.5-degree axial tilt leads to variations in sunlight exposure throughout the year. During the summer season in either hemisphere, the tilt is such that the Sun's rays hit the Earth at a more direct angle, leading to increased solar energy absorption and warmer temperatures.
Conversely, during the winter, the tilt causes the Sun's rays to strike the Earth at a sharper angle, resulting in less energy absorption and colder conditions. The regions closest to the equator receive the most direct sunlight, which leads to a warmer climate year-round. In contrast, the poles are characterized by an increased angle of incoming solar radiation, leading to more reflected sunlight and a cooler climate. The culmination of these factors influences the distribution of the Earth's climate zones.
how does bacteria affect the nitrogen cycle??
Answer: The bacteria break down organic material that contain nitrogen and release it back into the cycle.
For example, bacteria breaks down a leaf, then it will release the nitrogen into the soil for plant.
What is the correct definition of speed?
Answer: Speed: the rate at which someone or something is able to move or operate.
Answer:
The speed is defined as the rate at which a particular object covers a certain amount of distance. This speed can be fast or slow. An object covering a great distance in short period of time indicates a high speed and an object covering small distance in a large period of time depicts a slow speed.
This can be mathematically calculated.
Speed= Distance/Time
The unit of speed is meter/second. It can also be written as m/sec.
What is the best description of the word ‘recessive’ as it is used in biology?
Answer: c an allele that is only express if two versions of it are present in a cell
Explanation:
Your mom is making a salt solution for you to gargle with because you have a sore
throat. She fills a glass with warm water and adds two teaspoons of salt.
The water is the solvent.
True
False
Answer:
False.
Explanation:
It's false because the salt is what makes your throat fell less sore. Sure the water helps dissolve the salt, but the salt does most of the work.
Answer: FALSE
Explanation:
Cell structures that provide energy to the cell are called
Cell structures that provide energy to the cell are called mitochondria found in eukaryotic cells found in animals, plants, fungi, and many single-celled organisms
What are mitochondria and how does it provide energy to the cellMitochondria are specialized structures found in eukaryotic cells. They are often referred to as the "powerhouse" of the cell because they are responsible for producing most of the cell's energy in the form of ATP (adenosine triphosphate).
The process of energy production in mitochondria is called cellular respiration. It involves a series of chemical reactions that take place in the inner membrane and matrix of the mitochondria. During cellular respiration, glucose and other molecules are broken down to release energy. This energy is then used to produce ATP, which can be used by the cell for various function
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Human population increased sharply during the _____ because of improvements in farming techniques.
A Hunter-gatherer period
B Agricultural revolution
C Period of prehistory
D Industrial Revolution
B. During the agricultural revolution, there were vital new improvements in farming techniques that made a sharp increase in human population.
Explanation:The agricultural revolution began in Great Britain between the mid-17th century and the late 19th century. It brought new crops and grains and also new methods of farming and agriculture. Good irrigation system and drainage facilities also helped to increase the productivity of the crops.
An immense increment in farming output and productivity during the agricultural revolution added to the growth of the population. The farming revolution made a surplus of nourishment, so fewer people started to die of starvation. Statistics demonstrate that the revolution of agriculture committed a global rise in population.