Answer:
sweet-receptors bind to specific types of molecules, namely monosaccharides and disaccharides. Polysaccharides are not as sweet because they do not readily bind to the sweet-receptors on our tongue, as the other smaller molecules do
Answer:
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Explanation:
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what is nitrification? describe the role of nitrify bacteria in this process
Nitrification is a process that converts ammonia into nitrate by bacteria.
Role of bacteriaThe bacteria Nitrosomonas and Nitrococcus present in the soil convert NH3 to NO2-, and another bacterium, Nitrobacter converts NO2- to NO3-. These bacteria gain energy through these conversions.
Identify the four key concepts of Darwin's theory of natural selection. (2 marks)
Explain how Lamarck's theory was different and why it got rejected over time. (2 marks)
In a rainforest, there are trees of different sizes as shown in the figure below.
The trees in the UNDERGROWTH layer will probably face competition for which of the following resources?
a. Air
b. Water
c. Animals
d. Sunlight
The image of a scientist collecting a sediment core was taken at the Wild Harbor salt march on Cape Cod, Massachusetts. What evidence is this person hoping to collect from this research?
Scientist taking a sample of marsh soil.
© 2016 Woods Hole Oceanographic Institution
She hopes to discover if the oil is still floating on the surface.
She hopes to see if the oil is still present deep down below the surface.
She hopes to collect animals that have died from the spill.
She hopes to see how easily the oil can be removed from the soil.
Answer:
A. She hopes to discover if the oil is still floating on the surface.
How are proteins and nucleic acids related?
Answer:
C) The structure of proteins is determined by nucleic acids.
Explanation:
Protein is a polypeptide-based molecule. Polypeptides are a type of biological molecule made up of chains of amino acids. Nucleic acid, which comprises deoxyribonucleic acid (DNA) and ribonucleic acid (RNA), is a family of macromolecules made composed of long chains of polynucleotides (RNA).
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A tech is using the H (flagellar) antigen to serotype a suspected Salmonella species. The results of the serotyping are agglutination with one well that indicates a group of possible serotypes, not one particular serotype. Quality control passed. Why did this occur
Some Salmonella H antigens can occur in multiple strains and serotypes
An antigen (Ag) is any molecule/structure such as, for example, a molecule present on the surface of a pathogenic microorganism, that can be bound by a specific antibody and/or B-cell receptor. The Kauffmann–White classification scheme is a system that was adopted for use in 1934 in order to categorize different serotypes of the bacterial genus Salmonella, based on their somatic-surface antigens. The system is a practical (diagnostic) method based on the variation in the somatic (O) and flagellar (H) antigens present in the cell wall of Salmonella species. In this classification system, 'O' antigens are determined based on oligosaccharides which are associated with lipopolysaccharide, while the "H" antigens are distinguished by the protein content of the Salmonella flagella.Learn more about this topic here:
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by which large pieces of food are cut and crushed into
smaller pieces is called
a. emulsification b. chemical digestion
c. absorption de mechanical d
5. The tube that connects the mouth to the stomach is the
a. esophagus. b.epiglottis
c. peristalsis. d. pancreas.
5. The hard, outer coating of the tooth is called
a, a molar.
b. enamel.
c. an enzyme. d. dentin
- The building blocks of proteins are
a. enzymes. b. minerals,
c. amino acids, d. molecules
5. Which of the following vitamins is made by the body?
a. vitamin D- b. vitamin A c. vitamin C d. vitamin B
. Having too little of the mineral iron can cause
a. rickets.
b. goiter.
c. anemia d. beriberi.
The wavelike motion that moves food through the digestive tract is called
a. emulsification b. digestion. c. oxidation d. peristalsis.
. The enzyme that digests proteins is called
a. gastric juice. b. pepsin. c. chyme. d. lipase.
Food leaves the stomach in a thick, liquid form called
a. chyme. b. bile с. pepsin.
d. saliva
The movement of food molecules from the digestive system to the blood is called
a. emulsification. b. chemical digestion. c. absorption d. peristalsis.
Gastric juice contains all of the following except
a. hydrochloric acid
b. mucus c. pepsin
d. bile
The process by which large food molecules are broken down into smaller food
molecules is
a. chemical digestion. b. oxidation c. mechanical digestion d. absorption
d. mouth
Fats are digested in the
a. large intestine b. small intestine. c. stomach.
Poor nutrition caused by an unbalanced diet is called
a. rickets. b. anemia. c. malnutrition
d. goiter.
The fingerlike projections on the lining of the small intestine are called
h cilia
d. villi.
c. bile
Answer:
by which large pieces of food are cut and crushed into
by which large pieces of food are cut and crushed intosmaller pieces is called:
d. mechanical digestion
5. The tube that connects the mouth to the stomach is the:
a. oesophagus
5. The hard, outer coating of the tooth is called:
b. enamel
- The building blocks of proteins are:
c. amino acids
5. Which of the following vitamins is made by the body?
a. vitamin D- b. vitamin A c. vitamin C
. Having too little of the mineral iron can cause:
b. goitre
The wavelike motion that moves food through the digestive tract is called:
d. peristalsis
Gastric juice contains all of the following except:
d. bile
The process by which large food molecules are broken down into smaller food
The process by which large food molecules are broken down into smaller foodmolecules is:
c. mechanical digestion
Fats are digested in the:
b. small intestine
Poor nutrition caused by an unbalanced diet is called:
c. malnutrition
The fingerlike projections on the lining of the small intestine are called:
b. villi
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Answer:
d. mechanical digestion
a. esophagus
b. enamel
c. amino acids
a. vitamin D
c. anemia
d. peristalsis
b. pepsin
a. chyme
c. absorption
b. mucus
a. chemical digestion
b. small intestine
c. malnutrition
b. villi
Not 100% sure on some of these but very positive on most of them :) Hope this helps.
Explanation:
Which of the following is an example of a physical change?
O A. A gas is given off when two substances are mixed.
B. A copper rod is hammered into a thin sheet.
C. A solid forms when two clear liquids are mixed.
O D. A matchstick changes color when it burns.
A gas is given off when two substances are mixed.
physical change: A copper rod is hammered into a thin sheet.
A solid forms when two clear liquids are mixed.
A matchstick changes color when it burns.
explanation
a physicals change vs chemical
physical change is like cutting, changing shape etc, it the molecules that make it and the chemicals of it stay same
chemical change when it chemically changed such as cooking meat
why is the product MILO not a suitable for a vegan diet
MILO and MILO products may not be suitable for a vegan diet due to:
MILO and its products consist mainly of cocoa, malt barley, sugar, and milk powder. Milk powder essentially comes from animals.A vegan is a person whose lifestyles exclude animal products, especially when it comes to diets. A vegan diet primarily consists of plant and plant products.Hence, the fact that MILO consists of powder milk which is animal-based might make it unsuitable for a vegan diet.
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Answer:
Explanation:
VEGAN DIET
A Vegan diet refers to diet that contain food from plants such as maize , beans, rice, wheat e.t.c It is mainly plants source and does not contain animal source.
But MILO is also Plant based energy and it contains several vitamins and minerals to help grow a healthy body: It contain Vitamins B2 and B3 which help to support effecient energy release in the body. It contain Essential nutrients like iron, zinc which are very minute
in plant based diets. Milo contain milk which is of animal source.
Therefore, Milo product is not suitable for a vegan diet because it contains milk solids which is derive from animal source.
Identy three advantages and three disadvantages of bioplastics
Explanation:
Advantages of bioplastics
1.Less oil is used to produce petrochemical (oil-based) plastics which pose a great risk to the environment.
2.The common bioplastics can be injection molded and shaped to take the same form as traditional thermoplastics. In some cases, the bioplastics are stronger and lighter, too, so they are not necessarily only suitable for very niche applications.
3.Bioplastics are more marketable, for example, their usage may improve the value-add of a product through a green marketing campaign. After all, studies have shown that ‘80% of European customers want to buy products with a minimal impact on the environment,’ so bioplastics may represent a useful argument for brands.
Disadvantages of bioplastics
1.First, bioplastics are generally NOT cost-competitive compared to their oil-based counterparts. They are generally two or three times more expensive than the major conventional plastics such as PE or PET, and their production is plagued by low yields and being expensive. This disadvantage should be less acute when manufacturing plants become larger and benefit from economies of scale. A good example is Braskem’s 200,000-tonne bio polyethylene plant (equivalent to about 20% of the world’s current bioplastics production).
2.There is a concern that bioplastics based on terrestrial crops could harm food supplies; however, new innovations using food waste could be helpful in this regard and the concerns would seem to be unfounded as: ‘Perhaps 300,000 hectares are used to grow the crops which the industry processes into plastics. For comparison, this is about 0.02% of the world’s total naturally irrigated area available for cultivation. Even if half the world’s plastics were made from crops grown on food land, the industry would only require 3% of the world’s cultivated acreage.’
3.Crop-based bioplastics require fertile land, water, fertilizers, and are reliant on weather conditions. This means that the supply of raw materials for bioplastics are at risk of natural phenomena, such as drought.
Answer:
Three advantages of bioplastics:
1. Saving fossil fule
2. Reduction of greenhouse gas emission
3. Reclamation of by-products
Three disadvantages of bioplastics:
1. It won't biodegrade in a landfill
2. It contaminate plastic recycling streams
3. It encourage people to litter more
Explanation:
Hope it will help u
Produces proteins drop down menus
Explanation:
Ok, then what do you need explanation for that ??
4. Which is an environmental factor that affects skin color in humans?
A. number of linked genes
B. number of genes inherited
C. amount of food consumed
D. amount of sunlight absorbed
Answer:
Option D
amount of sunlight absorbed
A group of local environmentalists noticed that there were a lot of dead fish in the lake in their neighbourhood. They blamed it on agricultural activity and a substance P that was used to increase crop yield. P caused the rapid growth of aquatic plant Q which decreased the amount of dissolved R in water. What are P, Q and R? What is this process called?
Answer:
P-Pesticides, Q- Algae, R- Oxygen
Explanation:
Need help someone knows the answer
Answer:
d. landfill materials
Explanation:
State one reason why soil organisms need air
Answer:
Soil organisms need air because to release plants nutrition to soil .
which type of scientific inquiry requires variables and control group
Answer:The correct answer will be options-a scientific question, a procedure and a conclusion
Explanation:
The scientific investigation is performed to answer, understand and explain the natural events or phenomenon. The scientific investigation is performed through one of the types of scientific investigation that is descriptive, comparative, and experimental.
The common components of all types of investigation are :
1. Scientific question: the question is asked on the basis of observation made which could be answered.
2. Procedure: the sequential steps are followed to answer and test the scientific question.
3. Conclusion: the main aim of the investigation is the conclusion or inference to the scientific question which is an explanation of the question.
Explanation:
What are the physical characteristics that all specimens have in common
The physical characteristics that all specimens have in common can be presence of cells, as there is no specimen given, let's take animals. A dichotomous key can be used to find the similarity.
What is a specimen?A specimen can be anything that is displayed regarding the subject. In labs the specimens can be chemicals, animals, plants, any objects, etc.
Specimens are displayed to learn about them, to see the actual version of that animal that can not be seen easily.
Thus, Because no specimen is provided, let's take animals as an example, the presence of cells is a trait that all specimens share. To find the similarity, a dichotomous key might be utilized.
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Which is a benefit of binomial nomenclature?
1.Fewer common names
2.Increased understanding and communication
3.Reduced plant-related poisoning
4.Better understanding of genetics of plants
please help!! will give brainliest to whoever answers
Answer:
A
Explanation:
Just try it out if not then sorry but im pretty sure its A
Answer:
D Organisms that have favourable characteristics will survive and reproduce
Explanation:
"fitness is defined as reproductive success"
wikipedia
Where do convection currents occur atmophere
Answer:
Convection takes place in the atmosphere, in the oceans, and in Earth's molten subcrustal asthenosphere.
Explanation:
Question 17 of 25
Why do plants produce more carbon dioxide than oxygen during the night?
O A. Respiration produces oxygen during the day and carbon dioxide at
night.
B. Respiration can happen without sunlight, but photosynthesis
cannot.
O C. Respiration can only occur when there is no available sunlight.
O D. Photosynthesis only produces carbon dioxide during the night.
SUBMIT
Answer:
B
Explanation:
Respiration can happen without sunlight,but photosynthesis cannot.and photosynthesis doesn't take place at night,so less carbon dioxide is used up than it is produced.
I hope this helps
can you suggest me some biology experimental project work topics?
Answers:
1. General
2. Reproduction
3. Health
4. Genetic Engineering
5. Technical Experiments on Humans
6. Relationships and Media
7. War
8. Information and Communication Tech
9. Computer Science and Robotics
Fill in the blanks:
In water and ice, the slightly ______ hydrogen atoms in one water molecule are drawn to the slightly _______ oxygen atom in another water molecule.
A. positive, negative
B. negative, positive
C. neutral, positive
D. neutral, negative
Answer:
option c
Explanation:
The water molecule is a polar substance that has partially charged ions. The hydrogen atom is partially positive, whereas the oxygen atom is partially negative in charge. Thus, option A is correct.
What is polarity?The polarity of the molecule is defined by the presence of the electrical charges over the elemental atom that results in the formation of the chemical bonds by the electrostatic forces.
Water is an example of a polar molecule that is linked by a covalent bond by sharing the electrons between the oxygen and the hydrogen atom of the molecule.
The hydrogen atom is said to have a partial positive charge and oxygen has a partial negative charge because of the uneven electron density. The electronegative oxygen pulls the hydrogen towards it.
Therefore, option A. hydrogen is partially positive and oxygen is partially negative.
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Approximately how many mutations occur naturally in DNA per 10,000 bases?
A. 2
B. 2000
C. 200
D. 20
Explanation:
Modern methods indicate that the mutation rate is roughly one to two mutation per 10,000 genes per generation.
In human cells, approximately TWO (2) MUTATIONS occur naturally in DNA per 10,000 bases (Option A is correct).
The mutation rate (u) refers to the occurrence of new mutations in a given nucleotide sequence over time.In human cells, the mutation rate is approximately 10⁻⁴ per generation.Therefore, in a DNA sequence that has 10,000 base pairs of length, this value is equal to 2 mutations per generation (u = 2 / 10,000 = 10⁻⁴).In conclusion, approximately 2 MUTATIONS occur naturally in DNA per 10,000 bases (Option A is correct).
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One moth population carries three alleles at a genetic locus: X1, X2and X3. X1is dominant to X2and X3; X1produces red antennae. X2is co-dominant to X3; X2X2produces yellow antennae, X3X3produces white antennae, and X2X3produces light yellow antennae. The phenotypes in a population are as follows: 0.04 white; 0.16 light yellow; 0.16 yellow; 0.64 red.Assuming that this population is in Hardy-Weinberg equilibrium, what is the frequency of the X3allele in this population
Answer:
The correct answer is - 0.20
Explanation:
According to Hardy Weinberg equation under specific conditions the frequencies of the allele in the gene in a given population remain constant. Thus according to this frequencies of allele and genotype will remain the same through the generation unless there will be no evolutionary influence.
It helps us to predict the genotype frequencies in a large population. If there are two alleles having allelic frequencies p and q and we know equation of probability and frequencies add to 1
p2+2pq+q2=1
The X3X3 genome produces white antennae. Now Phenotypic frequency of the white antennae is 0.16 or 0.04 in the whole population. Hence the frequency of X3 should be a square root of 0.04 i.e, 0.20.
The human heart weighs how many pounds
After careful consideration your answer is...
Just about 1 pound
*Hope I helped*
~Alanna~
1 lb (pound)
Explanation:
it is the answer.
what is the average lifespan of a sperm cell
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The answer is...
5 days at least.
Good luck!
[tex]AnimeVines[/tex]
Explanation:
the answer is up to 5 days
What are three blood cells in a human body
Answer:
red
white
platelets
Explanation:
these are the three blood cells in the human body
Why do doctors have to check what blood type a person has before receiving a
transfusion?
0
A. Different blood types have different antibodies that will be attacked by someone with
antigens against that blood type.
B. Different blood types have different antigens that will be attacked by someone with
antibodies against that blood type.
C. Your blood type doesn't matter as long as you get the correct amount of blood in a
transfusion.
O
D. They need to have the same blood type because their DNA must be similar enough to
blend or will cause side-effects and possibly be rejected.
Answer:
A. Different blood types have different antibodies that will be attacked by someone with
antigens against that blood type.
Which of the following is the only one that could cause a theory to change over time?
Group of answer choices
The discovery of new evidence
Exciting new—but untested--hypotheses
A series of new laws passed by the government
A change in public opinion
Answer:
may be
the discovery of new evidence
Explanation:
Accepted theories may be modified or overturned as new evidence and perspective emerges. Scientists are likely to accept a new or modified theory if it explains everything the old theory did and more. The process of theory change may take time and involve controversy, but eventually the scientific explanation that is more accurate will be accepted.
