Answer:
Osmosis
Explanation:
because osmosis is the process by which water molecules move through through a selectively permeable membrane from region of higher water concentration to a region of low concentration.
Sedimentary rocks form because of all of the following EXCEPT
A. sediments becoming pressed or cemented together
b. crystals solidifying from magma
c. sediments forming from solution
d. water evaporating, leaving crystals behind
Answer:
a sediments becoming pressed or cemented together
Explanation:
Answer:
a
Explanation:
What are the two limits of natural selections
PLEASE I NEED HELP ASAP!!!!!!!!!!!???? :)
Answer: Dominant
Explanation: If the trait is dominant, one of the parents must have the trait. Dominant traits will not skip a generation. If the trait is recessive, neither parent is required to have the trait since they can be heterozygous. Determine if the chart shows an autosomal or sex-linked (usually X-linked) trait.
The structure of DNA resembles a twisted ladder. Which structural components form the rungs of the ladder?
A deoxyribose sugars
B phosphate groups
C nitrogenous base pairs
D ribosomes
answer is nitrogenous base pairs
Answer:
The ratios of thymine and adenine were similar, as were the ratios of guanine and cytosine.
Explanation:
deoxyribose + phosphate group + thymine
Answer:
C
Explanation:
Animals that uses simple diffusion respiration
Answer:
Flatworms and cnidarians
Explanation:
In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist so that gases diffuse quickly via direct diffusion. Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane
Which organs are part of the excretory systems
Answer:Kidney
Explanation:
The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.
An organs Kidney, ureter, urinary bladder and urethra are part of the excretory systems.
What is excretory system?It is biological system.The Excretory system eliminate excess wastes material from the body of the organism.It help to maintain internal chemical homeostasis.It prevent body for damage.Kidney filter the blood and filtrate obtained is urine.This urine is passes through ureter to urinary bladder and expelled out the body.To learn more about organs here,
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Which of the following is an example of an invasive species?
Need help immediately HELP!!!!!
Invasive species are the species which come and occupy the area and the habitat is lost when once they invade the habitat. Some of the examples of invasive species are asian carp and cane toad with many more.
What causes eutrophication ?When one species that invade the habitat and ends up the habitat of that particular area that is called as eutrophication and with that what happens is that the organisms which are living there ends up.
Ten most common of the world's invasive species are written as following :
1. Asian Carp.
2. Zebra Mussel
3. Cane Toad
4. European Starling
5. Kudzu
6. Asian long-horned beetle
7. Small Indian mongoose
Water hyacinth that is the terror of Bengal was once a decorative plant but when it was introduced to the water resources then at that time they multiplied to this extent that the species got automatically distinct from the water bodies.
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fungus cell is a prokaryotic cell. True or false?
Please help please thank u
Help ASAP! Which of the following does NOT act as an electron carrier (a filled “shopping cart”) in
cellular respiration or photosynthesis?
a) NADH
b) ATP
c) FADH2
d) NADPH
Answer:
I think it’s NADH
Explanation:
Which statement about water best illustrates the property of adhesion?
Answer:
The correct answer is- water droplet found on a spider web in the morning
Explanation:
Hope this helps u
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one of your friends says that heart disease is mostly inherited from your parents and grandparents and you cant do anything about it. Another friend says that it is caused by environment factors that you can control. What do you think? Explain your answer.
Answer:
Well, it can be both.
Explanation:
So for the parents and grandparents, It can be a genetic thing. Where your previous family members have had it and have passed it down. And for the environment thing, well, somethings can cause heart diseases like a disease on a wild animal or a foreign plant or drug can make your heart get a disease.
explain why an Organism genotype maybe homologous but never homologous recessive.
Answer:
The only way a phenotype or genotype can be recessive is if both alleles are recessive
Explanation:
i think
Answer:It helps an organism reproduce and therefore appears more often. And since dominant alleles sometimes are heterozygous, even if an organism with the dominant gene was able to reproduce, it could still produce a recessive offspring. So I would say that the gene that helps the organism reproduce would actually be the more prevalent trait
Explanation:
Which of the following is a mixture?
A.Gold
B.Honey
C.Steel
D.Water
Answer:
c
Explanation:
cuse steel is an alloy which is a mixture of a metal and non metal
What is a substrate?
a molecule that acts as a catalyst
a place on the enzyme where the reaction occurs
a place on the product where the enzyme fits
a reactant that is catalyzed by an enzyme
Answer:
D. a reactant that is catalyzed by an enzyme
Explanation:
A substrate is a reactant that is catalyzed by an enzyme. Therefore, the correct statement is option D.
What is a catalyst?A substrate is a reactant molecule that binds to the active site of an enzyme and the enzyme then chemically transforms the substrate through a series of catalytic reactions.
Enzymes are the catalysts that are used to increase the rate of biochemical reactions by lowering down the activation energy that is required for the reaction to occur. The substrate when binds to the active site of the enzyme, it forms an enzyme-substrate complex followed by its conversion into one or more products. When the product is formed, enzyme gets released from the product.
A catalyst is a substance which is used to lower down the activation energy required by the reaction, thereby, increasing the reaction rate to form a product.
Therefore, substrate is a reactant that is catalyzed by an enzyme.
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Describe the term "semi-permeable" (or "selectively-permeable) membrane. Why is it important?
Answer:
A semi-permeable membrane is a type of biological or synthetic, polymeric membrane that will allow certain molecules or ions to pass through it by osmosis. The rate of passage depends on the pressure, concentration, and temperature of the molecules or solutes on either side, as well as the permeability of the membrane to each solute. Depending on the membrane and the solute, permeability may depend on solute size, solubility, properties, or chemistry. How the membrane is constructed to be selective in its permeability will determine the rate and the permeability. Many natural and synthetic materials which are rather thick are also semipermeable. One example of this is the thin film on the inside of the egg.
Explanation:
An example of a biological semi-permeable membrane is the lipid bilayer, on which is based on the plasma membrane that surrounds all biological cells. A group of phospholipids (consisting of a phosphate head and two fatty acid tails) arranged into a double layer, the phospholipid bilayer is a semipermeable membrane that is very specific in its permeability. The hydrophilic phosphate heads are in the outside layer and exposed to the water content outside and within the cell. The hydrophobic tails are the layer hidden in the inside of the membrane. The phospholipid bilayer is most permeable to small, uncharged solutes. Protein channels are embedded in or through phospholipids, and, collectively, this model is known as the fluid mosaic model. Aquaporins are protein channel pores permeable to water. Information can also pass through the plasma membrane when signaling molecules bind to receptors in the cell membrane. The signaling molecules bind to the receptors, which alters the structure of these proteins. A change in the protein structure initiates a signaling cascade. The G protein-coupled receptor signaling provides is an important subset of such signaling processes.
In pea plants, the allele for round seeds is dominant to the allele for wrinkled seeds. If a plant that is heterozygous for seed type is crossed with one that has only wrinkled seeds, what percent of their offspring would you expect to have wrinkled seeds?
Answer:
50%
Explanation:
This question involves a gene coding for seed shape. The allele for round seeds (R) is dominant over the allele for wrinkled seeds (r). A heterozygous plant (Rr) will therefore be round seeded.
If a plant that is heterozygous for seed type (Rr) is crossed with one that has only wrinkled seeds (rr), the following gametes will be produced by each parent:
Rr - R and r
rr - r and r
Using these gametes in a punnet square (see attached image), the following offsprings will be produced: Rr, Rr, rr and rr
Rr - Round seeds
rr - wrinkled seeds
1 out of 2 offsprings will be possess wrinkled seeds i.e. 1/2 × 100 = 50%.
6g of calcium chloride must be heated in
order to dissolve it in a test tube of water.
After an experiment, as a test tube of salt
solution cools, salt forms at the bottom of
the test tube
As soda is heated, the amount of Carbon
dioxide dissolved in it decreases.
Calcium Chloride is more soluble when it
is heated
It take more time stirring to dissolve salt
in 100ml than it does in 200mL of water.
More salt can be dissolved in a 250ml
beaker of water than in a 100ml beaker of
water
More sugar can be dissolved in Hot tea
than iced tea
The solubility of Sodium Chloride is
almost identical at 15, 20, 25 and 30°C
Supports conclusion
Brings into question this conclusion
Neutral observation
Answer:
See explanation
Explanation:
I will try to explain each point mentioned to the best of my ability.
The dissolution of calcium chloride in water is endothermic hence more solute dissolves as the temperature increases. When the solution cools, the solubility of the solid also decreases with decreasing temperature hence the solid reappears.
When soda is heated, carbon dioxide gas is evolved thereby decreasing the amount of dissolved carbon dioxide.
Let me state that increase in volume of solvent increases the amount of solute that can dissolve in it. This is why 250ml volume of solvent can dissolve more solute than 100ml of solvent.
Also, temperature is an important factor when discussing the solubility of a solute. This is why the temperature at which a certain value of solubility is quoted must be indicated. For solids, solubility increases with increase in temperature.
Lastly, the solubility of sodium chloride is independent of temperature. This is clearly seen by plotting a solubility curve.
What did Watson and Crick’s model of DNA show?
sugars and phosphates on the inside
nitrogenous bases on the outside
a single nucleotide strand twisted in a spiral
two nucleotide strands wound in a double helix
Answer:
D.) Two nucleotide strands wound in a double helix.
Explanation:
Their model shows that DNA is composed of two double strand of nucleotide which are twisted around each other and run in antiparallel direction. the phosphate group and pentose sugar are present on outside, while nitrogenous base is present on inside
Answer:
Franklin produced an image containing "two strands twisted with double helix and phosphate back bone with base pairs".
Watson and Crick taken the x-ray image created by Franklin which lead to discovery of accurate model of shape of DNA.
.
Explanation:
2020
Which one is correct tho?
Answer:
is c
Explanation:
Which of the following are not considered to be decomposers?
Plants
Eubacteria
Archeabacteria
Fungi
1
Some plants can be grown in water using the technique of hydroponics. The roots are in water and
supplied with the ions that they need at the concentrations that support maximum growth. Some
ions can be absorbed both by diffusion and by active transport.
(a) (i) State two features of diffusion that do not apply to active transport.
Answer:
# Diffusion is a down hill process.(flow is from higher concentration to lower concentration)
# It does not require energy.
but,
# Active transport is a uphill process.(flow is from lower concentration to higher concentration)
# It requires energy.
Two features of diffusion that do not apply to active transport are:
Diffusion is a passive process that does not require energy input, while active transport requires the expenditure of energy in the form of ATP.Diffusion occurs down a concentration gradient, from an area of high concentration to an area of low concentration, while active transport can move ions against their concentration gradient, from an area of low concentration to an area of high concentration.What is Diffusion?Diffusion is a process by which molecules move from an area of high concentration to an area of low concentration, until they reach a state of equilibrium where there is no further net movement of molecules.
This occurs because molecules are in constant random motion, and they will naturally move from areas where they are more concentrated to areas where they are less concentrated. This process does not require energy input, and it will continue until the concentration of molecules is the same throughout the system.
Active transport, on the other hand, is a process by which molecules are moved across a membrane against their concentration gradient, from an area of low concentration to an area of high concentration.
This process requires energy in the form of ATP, which is used to pump molecules or ions against their concentration gradient. Active transport is able to move molecules or ions against their concentration gradient because it uses energy to change the shape of transport proteins in the membrane, allowing them to move molecules against their concentration gradient.
Therefore, two key features of diffusion that do not apply to active transport are that diffusion is a passive process that does not require energy input, while active transport requires energy input in the form of ATP.
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The 'run' in rise/run tells us which directions to go on the -axis?
Answer:
x- axis
Explanation:
x- axis is left to right, the run
y- axis is up to down, the rise
Answer:
The 'run' goes through the x-axis(horizontally). It can either go left or right depending on the direction of the slope.
What are cell cycle regulators
Answer: A conserved set of cyclin-dependent protein kinases (Cdks) initiate or regulate events through phosphorylation of intracellular proteins, thus controlling cell cycle progression, terminal differentiation, and apoptosis.
Explanation: Your welcome! ;D
mention the ways by which living beings adapt?
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For which gene or genes will the recessive trait be expressed in this individual?
The Q gene
The S gene
The T gene
The U gene
thank you <3
Answer:
t
Explanation:
its recessive
Which phrase describes a landform?
a feature of the landscape
the shape of land in an area
a process that shaped Earth's surface
the difference in elevation between the highest and lowest points
Which phrase describes a landform
Answer:
A) a feature of the landscape
Explanation:
got it right on edge
A landform is the set of forms that stand out on a plane or surface, being a feature of the landscape.
What is a landform?It is an outstanding texture of a surface that has different variations, among the most characteristic reliefs of the earth's surface are mountains, plateaus and plains.
These textures are presented in the form of irregularities and unevenness within a terrestrial or aquatic ecosystem, which provides a feature in a given landscape.
Therefore, we can conclude that a landform is formed by everything that protrudes from a flat surface or that modifies it, that is, it is the set of irregularities or features of a landscape.
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Someone please help me on this
the breakup of glucose into two pyruvate molecules. the maltose lands on the active site of the enzyme. the enzyme has to have a specific in order for the maltose to connect there.
FORENSIC SCIENCE!! When analyzing a strand of hair, investigators would first try to collect DNA from which general location?
Inside of the hair strand
The medulla
The hair tip/point furthest from the scalp
The point closest to the scalp
Answer:
The correct answer is - The point closest to the scalp.
Explanation:
In order to analyze a strand of hair investigators need to collect the DNA. To analyze a strand of hair the DNA must be nuclear DNA which can be found at the root of the hair near the scalp as the point, hair attached to the scalp there are cells that can provide the nuclear DNA. Any other section or the part of the hair strand does not contain the nuclear DNA so analyze DNA would not be possible.
PLS HELP NEED IT FAST
Answer:
sunlight is essential for normal growth of pine trees
Explanation:
I think becuase photosyinthiesis needs sunlight to be able for the trees to grow
i hope this helps
How does being small help cells survive?
Cells are small in size because it is very important that they have a surface area to volume ratio that would allow adequate intake of food nutrients, as well as the excretion of waste materials.
A cell can be defined as the fundamental (basic), functional, structural and smallest unit of life found in all living organisms.
According to cell type, living organism are mainly divided into two (2) main groups and these are;
Unicellular organisms: these are living organisms that are single-celled i.e they have a single cell.Multicellular organisms: this category of living organisms have many (multiple) cells.It is very important that the surface area to the volume ratio of cell is small, so as to allow enough materials such as food, move through the cell membrane quickly for the survival of the cell.
Hence, cells are small in size because it is very important that they have a surface area to volume ratio that would allow adequate intake of food nutrients, as well as the excretion of waste materials.
In conclusion, the smaller a cell, the larger would be its surface area to volume ratio.
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