Answer:
LD-50: lethal dose 50%, dosage that causes death to 50% of the exposed population
ED-50: effective dose 50%, dosage that causes an effect in 50% of the observed subjects
TD-50: toxic dose 50%, dosage that is toxic to 50% of the observed subjects
These curves do not apply to individuals because it is hard to predict the dosage that will cause a response in an individual, and more practical to predict what percentage of a population will be affected by a certain dosage of a chemical.
Explanation:
Use the diagram below to answer the question. Raw Eggs in Two Samples of Water salt water fresh water The diagram shows a raw egg placed in salt water and a raw egg placed in fresh water. Which characteristic of water is demonstrated in the diagram? a Salt water is cleaner than fresh water. b Salt water is more dense than fresh water. с Salt water has a lower temperature than fresh water. d Salt water has less electrical conductivity than fresh water.
Answer:
b.Salt water is more dense than fresh water is your answer.
Match the feature with its description.
HELP!! ASAP
Answer:
In order:
Stalactities
Stalagmites
Swallowhole
Sinkhole
The correct match of the features are:
Stalactites: Grow toward the cave floor.
Stalagmites: Grow toward the cave ceiling.
Swallow hole: A cave that has collapsed because of gravity.
Sinkhole: Where a stream disappears into the ground.
What are Stalactites?Mineral deposits known as stalagmites and stalactites are frequently seen in caves. The pointy, downward-pointing minerals that fall from the caves' roofs give rise to the stalactites.
On the other hand, stalagmites are created when minerals that fall from the roof are deposited on the ground afterward.
Therefore, the correct options are:
Stalactites: Grow toward the cave floor.Stalagmites: Grow toward the cave ceiling.Swallow hole: A cave that has collapsed because of gravity.Sinkhole: Where a stream disappears into the ground.To learn more about Stalactites, refer to the link:
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Please help I’ll give brainist!
Answer:
Explanation:
DIFFERENTIATE BETWEEN ASEXUAL AND SEXUAL REPRODUCTION for class 7
Answer:
Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual reproduction involves two parents and produces offspring that are genetically unique
2. Which group of animals is found in a water habitat?
A dolphin, carabao, cat
C. cat horse, goat, monkey
B. fish, squid, crab
D. tadpole, grasshopper, hawk
Answer:
B) . fish, squid, crab
Explanation:
Y YOU CAN MARK ME AS BRAINIEST IF YOU WANT
Why do we shiver when we’re cold?
Answer:
A shiver is caused by your muscles tightening and relaxing in rapid succession. This involuntary muscle movement is your body's natural response to getting colder and trying to warm up.
You shiver when your cold because your body kinda since's when your cold and you start shivering to make your body warm-up.
Hope This Helps! Have A GREAT Day!!!Question 24 of 35
Which two statements describe the Mesozoic era?
A. Most of Earth's history took place within this time.
B. Plants began to colonize land during this era.
C. It is also known as the Age of Reptiles.
D. It lasted from about 250 million years ago to 70 million years ago.
Answer:
A
Explanation:
A because a meteor hit when the dinos were alive
In which part of the food chain is each of the algae?
Answer:
(algae) in the oceans. These organisms are called the producers, and they get their energy directly from sunlight and inorganic nutrients.
Explanation:
so producers
have a good day you silly goose
What is one of the main ways that evolution occurs in prokaryotes?
A. Crossing over during DNA replication
B. Exposure to pathogens that change DNA
C. Mutations that occur during binary fission
D. Exchanging DNA during alternation of generations
E. Decomposing dead organisms
Answer:
answer:
the.answer.is.b
B B B
One of the main ways that evolution occurs in prokaryotes is through mutations that occur during binary fission, which is present in Option C. In prokaryotes, which are single-celled organisms that lack a nucleus, evolution occurs primarily through mutations that occur during binary fission.
What is mutation?Prokaryotes, which include bacteria and archaea, are unicellular organisms that lack a nucleus and other membrane-bound organelles. They are known for their remarkable adaptability and ability to evolve rapidly in response to changing environmental conditions, and beneficial mutations that improve an organism's fitness, such as antibiotic resistance, can quickly spread through a population through natural selection.
Hence, one of the main ways that evolution occurs in prokaryotes is through mutations that occur during binary fission, which is present in Option C.
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What does the bottom question mean? Will give extra points for right answer only
Answer:
its talking about how much can the red line go up till u hit its temp limit i wish i could help more but i cant see hardly anything to tell u the complete anwser
Explanation:
Answer:
Compare the temperture to the 'recommended temperature limit' line.
Explanation:
'how does....relate' also means compare/describre how they affect one another.
Where were the metal cylinders located when they had the MOST
gravitational potential energy?
Just above the short plastic tube
O Just above the long plastic tube
O At the bottom of the long plastic tube
O At the bottom of the short plastic tube
Answer:
The answer is third example
At the bottom of the short plastic tube metal cylinders located when they had the Most gravitational potential energy.
What is Gravitational potential energy?The energy that an object has due to its location in a gravitational field is known as gravitational potential energy.
When an object is close to the surface of the Earth, when the gravitational acceleration can be assumed to remain constant at roughly 9.8 m/s2, gravitational potential energy is most frequently used.
The potential energy at a height h above that point is equal to the effort that would be needed to raise the object to that height with no net change in kinetic energy because the zero of gravitational potential energy can be chosen at any location.
Therefore, At the bottom of the short plastic tube metal cylinders located when they had the Most gravitational potential energy.
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Light Reactions : ATP :: Calvin Cycle :
a. G3P
b. H2O
c. O2
d. H+
Answer:
a. G3P
Explanation:
Photosynthesis is the process by which plants synthesize their food from inorganic sources in the presence of light. The photosynthetic process occurs in two stages namely: light dependent stage (light reaction) and light independent stage (Calvin cycle).
The light stage primarily functions to synthesize ATP and NADPH products needed in the Calvin cycle to synthesize sugar (glucose). However, the CALVIN CYCLE produces a three-carbon compound called GLYCERALDEHYDE-3-PHOSPHATE (G-3-P) as one of the precursors of glucose.
4 Which of the following is NOT a beneficial use of bacteria? A. bioremediation C. food poisoning B. decomposition D. nitrogen fixation
Answer:
food poisoning
Explanation:
11. Many plants use brightly colored flowers to attract insect pollinators.
Which is the MOST likely conclusion about a plant that has very small flowers that
are hard to see?
CLE
Answer: Pollen can be blown in the wind which the bees/other pollinators can follow to get to the flowers.
Explanation: Plants rely on bees and other insects to reproduce and so they have adapted, over time, to become more attractive to them. Bees are drawn to plants with open or flat tubular flowers with lots of pollen and nectar. A flower's scent can have particular appeal to bees, and its bright colors or pollen being blown in the wind may lure the bees in.
6. How could a dichotomous be helpful to you if you
were lost in the wilderness?
Which two organs do not have glands at all? Name it.
Answer:
A gland is an organ which produces and releases substances that perform a specific function in the body. There are two types of gland. Endocrine glands are ductless glands and release the substances that they make (hormones) directly into the bloodstream.
So technically there are no such things as organs without glands
QUICK ASAP PLS Certain bacteria live and grow on the roots of some plants and produce chemicals that are beneficial to the plants. Which of the following observations best supports the claim that this relationship is beneficial to the plants?
Group of answer choices
Plants with a higher amount of the bacteria on their roots have increased rates of survival and reproduction.
When the bacteria are removed from the plant roots and are grown in a laboratory setting, they fail to survive.
The population size of the bacteria varies greatly depending on the chemistry of the soil and the type of the plant.
The chemical produced by the bacteria can be created by humans and added to the soil where it reaches the roots of the plant.
Answer:
Explanation: Plants with a higher amount of the bacteria on their roots have increased rates of survival and reproduction.
A male and female Oompah have the same genotypes: blue face (ff) and big feet (Ll). Determine what they’re offspring may look like!
Answer:
They Will have Blue Face and Large feet
Explanation:
for the blue face you will get 100% Blue face
for the large feet you will 75% Large feet and 25% small feet
Which statement describes a reason people must protect mineral resources?
A. Minerals are being replaced by human-made resources.
B. Fewer products are being made with minerals.
C. Minerals can be easily recycled and reused.
D. Minerals take more than a thousand years to form.
Answer:
ig its D
Explanation:
because minerals take millions of years to form
Answer:
D. Minerals take more than a thousand years to form.
Explanation:
I took the test
What are the levels of organization in the human body, starting with the cell?
Answer:
cells
v
tissues
v
organs
v
organ system
v
organism
cells make tissues that build up organs to build a organ system then organism (you,a human)
cells are the building block for life
The level of organization in the human body initiates with the cell and process in the manner which is as follows:
Cell < Tissue < Organ < Organ system < Organism. What is the level of organization?The level of organization may be defined as the process of sequence from the structures that are simplest in nature. It is usually defined by part-whole relationships, with things at higher levels being composed of things at the next lower level.
In organisms, a cell is the fundamental structural and functional unit of life. The collection of cells constitutes the formation of tissue which makes an organ that plays a specific function. Groups of organs form organ systems. While all cells, tissues, organs, and organ systems combine in order to form multicellular organisms.
Therefore, the level of organization in the human body initiates with the cell and processes in the manner which is well-described above.
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How can a material at a certain temperature have all of its molecules at the same energy?
Answer:
The average kinetic energy of the molecules is proportional to absolute temperature. At any given temperature, the molecules of all gases have the same average kinetic energy.
Explanation:
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. Solids, liquids and gases all expand when heat is added.
What is the meaning of science?
What is the role of microfilaments in cell division?
Answer:
Explanation:
Another important function of microfilaments is to help divide the cell during mitosis (cell division). Microfilaments aid the process of cytokinesis, which is when the cell “pinches off” and physically separates into two daughter cells.
Answer:
The pull the cell membrane in.
Explanation:
I took the quiz.
A 3-column table with 2 rows titled Table 2 Diffusion Tests. Column 1 has entries Color of Solution in Dialysis Tube, Color of Solution in Beaker. Column 2 is labeled Step 4: Test for Diffusion Starch with entries Clear initial color and Black after 15 minutes, Yellow initial color and Yellow after 15 minutes. Column 3 is labeled step 7: Test for Diffusion of Glucose with entries Not observed, Light Blue initial color and Red after 15 minutes.
Analysis:
diffused though the semipermeable membrane.
Answer:
only glucose
Explanation:
The second student set up solutions that were in equilibrium.
On which principle Dialysis is based?Dialysis is based on the principles of osmosis, meaning the net movement of solvent molecules through a selectively permeable membrane into a region of higher solute concentration. If the solute concentrations are the same on each side of the membrane, this spontaneous movement will not occur.
In passive diffusion, the small water molecules can move across the phospholipid bilayer seen in blue. This layer acts as a semi-permeable or selectively permeable membrane; its hydrophilic heads are attracted to water (seen facing outwards) while its water-repellent hydrophobic tails face towards each other- allowing molecules of water to diffuse across the membrane along the concentration gradient.
Therefore, the second student set up solutions that were in equilibrium.
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Describe the northern and southern hemisphere in terms of the distribution of the cryosphere
Answer:
The cryosphere is the portion of the Earth's surface where water is in solid form. It thus includes sea ice, lake ice and river-ice, snow cover, glaciers, ice caps and ice sheets, and frozen ground. The snow cover has the largest extent, with a maximum area of more than 45 106 km2 (Table 1.1). Because of the present distribution of continents, land surfaces at high latitudes are much larger in the Northern Hemisphere than in the Southern Hemisphere. As a consequence, the large majority of the snow cover is located in the Northern Hemisphere (Figs. 1.15 and 1.16). The same is true for the freshwater ice that forms on rivers and lakes in winter. Both the snow cover and freshwater ice have a very strong seasonal cycle, as they nearly disappear in summer in both hemispheres (Table 1.1).
Explanation:
The cryosphere is the portion of the Earth's surface where water is in solid form. ... Because of the present distribution of continents, land surfaces at high latitudes are much larger in the Northern Hemisphere than in the Southern Hemisphere.
answer for brainlist
Answer: Your answer is A
Explanation: Really hoped i helped u out
Answer:
Genes
Explanation:
if im not mistaken the answer is A
i think its bacteria but im not sureee (the fox diagram thing)
Explanation: your right it is bacteria , could i pls get a brainlesttttt
What are 3 parts that plant cells have that animal cells do not have
Answer:
Vacuole
Chloroplast
Cell wall
Explanation:
Use the illustration below to answer this question. What is the name of the
cellular structure labeled "X"?
CSD
O Chloroplast
O Mitochondria
O Lysosome
O Central Vacuole
Why is water called the universal solvent?
A.) Water is a nonpolar substance that dissolves polar substances
B.) Water can act as a solvent in many different solutions
C.) Water is a polar substance that dissolves nonpolar substances
D.) Water can act as a solute in many different solutions
Answer:
And, water is called the "universal solvent" because it dissolves more substances than any other liquid. ... This allows the water molecule to become attracted to many other different types of molecules.
Explanation:
B.) Water can act as a solvent in many different solutions.
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. Water molecules have a polar arrangement of oxygen and hydrogen atoms—one side (hydrogen) has a positive electrical charge and the other side (oxygen) had a negative charge.A water molecule consists of two hydrogen atoms and one oxygen atom. The three atoms make an angle; the H-O-H angle is approximately 104.5 degrees.Therefore, option B. is correct.
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