A physical change occurred when a metal changed colonial because it reacted with another substance. There are two types of change, out of which one is physical change. This change can be defined as a change in the form of any chemical substance and chemical composition is not affecting in this change.
ddt is stored in body fat and remains toxic for many years. explain why these characteristics are undesirable in a pesticide. what characteristics would you want in a pesticide to make it less harmful to non pest organisms?
The application of DDT as a pesticide result in the storage of the substance in the fats of an organism's body and thus remains toxic for several years. This may cause issues in animals and may ultimately reach all the other species in the food chain.
So, in order to make a less harmful pesticide, one would need the features, which would make the pesticide to only influence the pests, and would also want it to function more promptly. A pesticide is less harmful if it monitors what one wants to control and does not affect other organisms in the surrounding.
A less harmful pesticide would only monitor aphids, gypsy moths, or nuisance wasps, but would not kill honey bees, butterflies, praying mantis, or ladybugs. The pesticides, which would not remain in the environment are generally less harmful, in comparison to those that remain in the water, soil, or air for a longer duration.
DDT's fat solubility and persistence in the environment cause bioaccumulation and biomagnification, harming non-pest organisms. A harmless pesticide should be biodegradable, non-toxic to non-target organisms, and pest-specific. Fungal insecticides can be a good alternative.
Explanation:The attributes of DDT (Dichloro-diphenyl-trichloroethane) being fat soluble and long-lasting are undesirable in a pesticide because they lead to bioaccumulation and biomagnification in the ecosystem, causing harm to non-pest organisms. This happens as DDT is absorbed and stored in the fat tissues of organisms, and its concentration increases up the food chain causing harmful effects on top predators such as eagles, which experienced thinning of eggshells that led to population decreases.
Ideally, a less harmful pesticide should be biodegradable, non-toxic to non-target organisms, and specific to the pest it is meant to control. It should also not accumulate in the bodies of organisms or in the environment.
Alternative solutions such as fungal insecticides can be considered. Fungal insecticides are usually non-toxic to humans and can kill a wider variety of insects than a chemical pesticide, and even eliminate plant pathogens.
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What best demonstrates the flow of energy through the environment?
sex brcuz that friction be tense sometimes
In a scientific investigation of lakes the depth of a lake is most likely to be measured in
Either feet or meters, but each country/state is different.
Answer:
In a scientific investigation of lakes the depth of a lake is most likely to be measured in meters.
Because the depth is the distance of an element from a horizontal reference plane and The unit of measure for distance according to the international system is the meter.
What is cellulose?
A) a polypeptide composed of many monomers
B)a carbohydrate composed of many fatty acids
C)a polymer composed of many glucose units
When a plant cell is placed in salt water, the cell is affected and changes size. What part of the cell will be unaffected?
A)The Cell Wall
B)The Vacuole
C)The Cytoplasm
D)The Cell Membrane
Your answer is A~Cell Wall
The part of the cell that will remain unaffected when a plant cell is placed in salt water is the Cell Wall.
Explanation:When a plant cell is placed in salt water, the part of the cell that will be unaffected is The Cell Wall. The cell wall is a rigid structure made of cellulose and is responsible for providing support and protection to the cell. Salt water doesn't directly affect the cell wall, but it affects other parts of the cell, causing it to shrink or expand.
When a plant cell is placed in salt water, water molecules move out of the cell due to osmosis, causing the cell to shrink. This happens because the concentration of salt outside the cell is higher than inside the cell, creating a hypertonic environment. The cell membrane, cytoplasm, and vacuole are all affected by the movement of water molecules and can change in size.
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What are three or more characteristics of the whole Anticide family of elements?
Elements may be categorized according to element families. Elements are classified into families because the three main categories of elements (metals, nonmetals ... The characteristics of the elements in these families is determined ... more dense than the alkali metals; higher melting points
A patient arrives at an emergency room complaining of pain in her ankle. The nurse examines the patients ankle, looking for skin discoloration or swelling. The nurse is replying mostly on his knowledge of
Final answer:
The nurse is relying on their knowledge of anatomy and physiology to examine the patient's ankle and look for signs of injury or infection, such as skin discoloration or swelling.
Explanation:
The nurse is relying mostly on their knowledge of anatomy and physiology to examine the patient's ankle and look for skin discoloration or swelling. Understanding the structure and function of the ankle joint and its surrounding ligaments helps the nurse identify any abnormalities or injuries.
In this case, the patient's complaint of pain in the ankle suggests a possible injury or condition like a sprain or infection. By assessing the appearance and symptoms, the nurse can gather important information to make an initial evaluation and determine the appropriate course of action.
For example, if the ankle is swollen, discolored, and painful, it may indicate an inversion ankle sprain where the ligaments on the lateral side of the ankle are damaged. If there are signs of redness, warmth, and pus, it could suggest an infection. The nurse's knowledge and observation skills allow them to assess the situation and provide appropriate care or refer the patient to further medical intervention.
how does your body respond to loud noises? is this an internal or external stimulus?
Answer:
I know this is really late but loud noises are an external stimulus and your body responds by usually covering your ears or if it is sudden you react by jumping or something.
Explanation:
In response to loud noises, an external stimulus, the body's auditory system processes sound waves which results in auditory neural signals being sent to the brain. The intensity of the sound affects the magnitude of this response. If the sound is too intense, it can potentially harm the auditory system and lead to hearing loss.
Explanation:When your body responds to loud noises, it's reacting to an external stimulus. Sound waves or auditory stimuli act on the outer ear (pinna, canal, tympanum). These waves cause vibrations, and the tympanum then sends that energy to the middle ear. From there, the middle ear bones shift, and the stapes transfers the mechanical energy to the oval window of the inner ear (cochlea). Once inside the cochlea, the energy creates a shift in the basilar membrane, thereby bending the stereocilia on the receptor hair cells. This process activates the receptors, which transmit auditory neural signals to the brain, producing the perception of sound. It's clear to see this process is affected by the sound intensity; if the intensity is too high, it could lead to disruptions in hearing, or even hearing loss.
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Thyroid gland and prostate gland are located at?
The anterior part of the lower neck, below the larynx (voice box).
The region of the ocean is which photosynthesis occurs is called
Answer:
The area of the ocean where photosynthesis occurs is known as the euphotic zone (meaning "good light"). From the standpoint of living organisms, the euphotic zone is probably the most important of all oceanic zones. ... This layer is known as the dysphotic zone (meaning "bad light").
Final answer:
Photosynthetic organisms are found in the ocean's photic zone, where sunlight can penetrate and enable the process of photosynthesis. This also includes the intertidal, neritic, and oceanic zones within the photic zone.
Explanation:
The region of the ocean in which photosynthesis occurs is known as the photic zone. This is the upper part of the ocean into which sunlight penetrates, enabling photosynthetic organisms like phytoplankton to produce energy. It extends down to about 200 meters below the sea surface. Photosynthetic organisms, which are the foundation of the aquatic food web, are not found in significant numbers in the aphotic zone, where there is insufficient light for photosynthesis. Instead, one would expect to find photosynthetic organisms in areas such as the photic zone, the intertidal zone, the neritic zone, and the oceanic zone, contrary to the aphotic zone, deeper abyssal zones, or the benthic realm which is the ocean floor—excluding those areas in the photic zone.
Why is it important to keep our water supply clean give 3 sentences ?
We require to keep our water supply clean because we imbibe that water. If our water supply wasn't unsullied, we would die of dehydration. Another reason is that without water, all the crops would die and we wouldn't have any aliment to victual and so we would withal die of hunger.
which is an example of artificial selection
-two male wild turkeys fight. The weaker one is killed. The winner mates with all the females
- A farmer crosses two kinds of corn. He produces a new, better tasting type of corn
-a flood drowns most of the lizards in an area. Only lizards that can swim live to reproduce
A farmer crosses two kinds of corn. He produces a new, better tasting type of corn is the answer
How does climate affect soil formation?
Climate is one of the five soil forming factors and has a significant influence on the properties of soil. Soils in warmer or wetter climates are more developed than soils in cooler or drier climates.Warm conditions promote the chemical and biological reactions that develop parent material into soil.
Climatic Factors in Soil Formation
Have you ever wondered why deserts have dry soil while forests have rich soil?Climate is a direct influence on things such as soil moisture and temperature.Climate is important because it influences plants, which can transform soil.If temperatures are extremely high, all the water evaporates away.DNA replication is an important part of cellular division because correct replication
A) ensures that identical and complete genetic information is passed to both daughter cells.
B) produces mutations that usually are advantageous for the survival of the organism.
C) combines sperm and egg to form a zygote that will develop into a new organism.
D) communicates information about the cellular environment to adjacent cells.
The answer would be a.ensures that identical and complete genetic information is passed on to both daughter cells
DNA replication is an important part of cellular division because correct replication ensures that identical and complete genetic information is passed to both daughter cells. The correct option is a.
What is DNA replication?DNA replication is the physiological method that generates two identical replicas of DNA from a single original DNA molecule in molecular biology.
DNA replication occurs in all living life forms and is the most important component of biological inheritance.
Each DNA molecule is made up one strand of the original DNA molecule and one strand that has been synthesized (created). As a result, DNA replication is referred to as semiconservative.
DNA includes the instructions that an organism requires to develop, survive, and reproduce. Before cells can divide, their DNA must be replicated.
This ensures that each daughter cell receives a copy of the genome, resulting in successful genetic trait inheritance. DNA replication is an essential process that is conserved across all organisms.
Thus, the correct option is a.
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How do geologists study direct evidence of Earth’s interior?
Geologists study the Earth's interior through seismic waves, earthquake analysis, volcanic activity, analysis of rock samples, and drilling or deep-sea exploration. These methods provide direct and indirect evidence about the composition, structure, and behavior of the Earth's interior.
1. Seismic waves: Geologists use seismic waves generated by earthquakes or artificially created through explosions or vibrations to study the Earth's interior. These waves travel through different layers of the Earth and provide valuable information about their composition, density, and structure. By analyzing the speed, direction, and behavior of seismic waves, geologists can infer the characteristics of different layers, such as the crust, mantle, and core.
2. Earthquake analysis: By studying the behavior of earthquakes, geologists can gain insights into the Earth's interior. Earthquakes occur due to the release of energy along faults within the Earth's crust. The study of earthquake locations, magnitudes, and depths helps geologists map fault lines and understand the behavior of rocks under stress. This information indirectly provides information about the conditions and properties of the Earth's interior.
3. Volcanic activity: Volcanoes are another source of direct evidence about the Earth's interior. When volcanoes erupt, magma from the Earth's mantle rises to the surface. Geologists study the composition of volcanic rocks and gases to understand the chemical and physical properties of the mantle and the processes occurring deep within the Earth.
4. Rock samples: Although direct access to the Earth's interior is not possible, geologists can analyze rocks that have been brought to the surface through volcanic eruptions or tectonic processes. By examining the composition, mineralogy, and structure of these rocks, geologists can make inferences about the deeper layers of the Earth.
5. Drilling and deep-sea exploration: In some cases, geologists can directly access deeper layers of the Earth's interior through drilling or deep-sea exploration. Deep drilling projects, such as the Kola Superdeep Borehole in Russia, have provided valuable information about the Earth's crust and upper mantle. Deep-sea exploration also allows scientists to study the oceanic crust and make observations about the underlying mantle.
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Why do you think pressurized seeds and spores are beneficial adaptation for these plants and fungi
The pressurized seeds and spores have the ability to spread, helping the organism reproduce. In plants, it allows them to reduce competition by flinging the seeds far away so that their offspring don’t compete for resources. For the fungus, it allows the parent to fling the spores into the grass so that when the horse eats them, the life cycle of the fungus continues.
Natural selection is an example of a mechanism of ed evolution. Does this mechanism produce a change in individuals or populations? Explain !
Allele frequencies in a population may change due to four fundamental forces of evolution: Natural Selection, Genetic Drift, Mutations and Gene Flow. ... Two of the most relevant mechanisms of evolutionary change are: Natural Selection and Genetic Drift.
if there is a low concentration of sucrose to water (so there’s more water than sugar in a solution) outside of a cell, will the cell shrink or expand? and why (using osmosis to explain)?
i believe that the cell will expand because there is less sugar in the water. if you were to add more sugar into the water, then the cell will shrink in size because sugar and salt is the same thing if you add it in water.
Most wood floats in water but samples of wood called ebony can sink. Based on the reading, what would you say about the density of this sinking wood compared to the density of water?
Floating and Sinking is based on the density of each material.
The more dense objects sink to the bottom, while the less dense objects float to the top.
Since the ebony sinks, it can be concluded that the density of ebony is greater than the density of water.
Ebony wood sinks in water, indicating that its density is greater than the density of water. It sinks because it displaces less water than its own volume.
The density of a substance determines whether it will float or sink in a liquid such as water. Objects that are less dense than water float, while objects that are denser than water will sink.
Consequently, the fact that ebony wood sinks in water indicates that its density is greater than that of water. In this case, ebony exhibits higher density, likely due to its compact structure and constituents, leading it to displace less water than its own volume, thus causing it to sink rather than float like most other types of wood.
What property allows water to stick to glass: cohesion, suspension, adhesion or solution?
The answer is cohesion.
Which of the following is not a renewable resource? A. Wind B. Trees C. Corn D. Gasoline
D) Gasoline
Gasoline isn't renewable.
Explanation:
Gasoline is made from dead organisims, burried i the ground for millions of years.That's what makes it non-renewable.Gasoline can run out, and not be re-placed for millions of years.
The resource from the options provided that is not renewable is Gasoline. This is because gasoline is derived from fossil fuels, which are not replenished within a human timescale.
Explanation:The question is asking which among the given options is not a renewable resource. So first, let's understand what a renewable resource is. A renewable resource is a natural resource that can be replenished to overcome usage and consumption, usually through biological reproduction or other naturally recurring processes.
Among the options given: A. Wind, B. Trees, C. Corn, and D. Gasoline, the non-renewable resource is Gasoline. Wind, trees, and corn are all renewable resources. They replenish over time via natural processes like wind circulation, tree growth, and corn plant growth. On the other hand, gasoline is derived from fossil fuels, which can take millions of years to form and, once used, cannot be replenished on a human timescale.
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Describe the major contribution of Dalton's atomic theory to the understanding of atomic structure.
A) Electrons can only be located in circular, concentric shells.
B) Chemical elements are made up of identical units called atoms.
C) Discovery of the existence, location, and charge of the nucleus.
D) The determination of the identity of the three subatomic particles.
B) Chemical elements are made up of identical units called atoms.
John Dalton was the one who discovered "all matter is made of atoms". Democritus was the one who suggested that atoms were there but it was not scientifically proven until 2 centuries later when John Dalton proved it.
organisms are in constant competition for_____
organisms are always in competition for resources such as food and water or simply just for space.
Food, water, and more environment. Hope it helps! #Brainiac
A solution at a pH of 10 contains how many times more hydrogen ions than a solution at a pH of 7?
What causes the ocean waves that surface use for their sport ?
A. Sunlight heating water
B. Wind blowing across water
C. Destiny differences in water
D. Salinity differences in water
In the united states, unwise land-use practices lead to annual losses of topsoil by wind and water totaling _____. a) 4 billion metric tons b) 18 millionmetric tons c) 1.5 billion metric tons D) 2.5 million metric tons ?
Your answer is a.) 4 billion metric tons
Answer:
4 billion metric
Explanation:
8th grade sicence question please answer ASAP
roosters have genes that determine feather length. which term describes the form of a gene that produces a specific trait, such as long feathers or short feathers? a. allele. b. dna. c. chromatic. d. gamete
Allele.
-An allele is a form of a gene that determines a specific trait.
-dd.
-Traits are passed in discrete units from parent to offspring.
-He collected detailed information on inherited traits of pea plants.
Hope this helps
The operative unit of hereditary is called genes. Genes are made of DNA and they act as a messenger to make protein for cell structure and functioning.
The correct answer is:
Option A. Allele
This can be explained as:
An alternative form of a gene is called an allele it defines a specific trait.These traits get carried from parents to their offspring in a discrete assemblage.DNA is biochemical carrying the genetic data to be coded.While gametes are the reproductive cells of the female and males.Therefore, alleles are the form of genes that determines a specific type of trait.
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An organism that uses energy to produce its own food supply from inorganic compounds is called
issa AUTOTROPH
____________________________________________________________________
Sometimes u should look up the question u might find the answer that wayu you could save some point 4 when u really need em on a hard question
Final answer:
An autotroph is an organism that can produce its own food from inorganic compounds using energy from sunlight or chemical reactions.
Explanation:
An organism that uses energy to produce its own food supply from inorganic compounds is called an autotroph. These producers are essential to ecosystems because they create organic molecules that all other organisms depend on for survival. There are two types of autotrophs: photoautotrophs, which use sunlight for energy, and chemoautotrophs, which gain energy from chemical reactions.
Complete the following analogy:
eukaryotic: mitosis: prokaryote:
Eukaryotic: mitosis: prokaryote: binary fission
Eukaryotic cells reproduce by mitosis while prokaryotes reproduce by binary fission.
Eukaryotes include fungi, plants, and animals and are complex in structure. They have a nucleus, several organelles and more DNA (deoxyribonucleic acid). Eukaryotic cells undergo mitosis; a form of cell division that usually produces two similar daughter cells with the same genetic component as the parent cell. Prokaryotes include bacteria, and archaea, and are quite simple in structure. They do not have organelles or nucleus, but they have only a small amount of DNA. Prokaryotes undergo binary fission; a type of asexual reproduction in which there is replication and segregation of a single DNA molecule.