Answer:
recent study out of the Weizmann Institute in Israel states that the number of bacteria may actually be very similar to the number of human cells in the body.
While this results in about 1.3 bacterial cell per human cell, the numbers may vary significantly from person to person and could change significantly with each defecation. They estimate that the range of bacterial cells goes from about 30 to 50 trillion in each individual. Women may also have a higher ratio of bacterial cells than human cells because they have fewer human cells, specifically red blood cells.
Why do scientists use the International System of Units (SI)?
A. because the SI is based on the metric system
B. because the tools scientists use only measure in SI units
C. so they can communicate their results without confusion
D. so all scientists are guaranteed to come up with the same measurements
PLEASE HELP
Which of the following is NOT a role of plasma proteins?
To destroy infectious agents
To help transport insoluble molecules
To make the blood thicker
To help maintain the osmotic balance and pH of the blood
All of the above are roles of plasma proteins.
Molecules cannot react chemically unless they are......
a) polar b)solvents c)active d)in solution
*PLEASE ANSWER WITH EXPLANATION.*
Answer:
c) active
Explanation:
When in an atom the outermost shell is not full (eg. 2,8,3 ; here in the last shell it is not filled completely and needs 5 more electrons to complete it ) then the atom becomes active and molecules doesn't react unless and until an atom is active .
Hope it helps you
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In which cell below would a student likely observe a cell plate during mitosis?
A: Rat muscle cell
B: onion root cell
C: human lung cell
D: alligator stomach cell
Answer:
B. Onion root cell
Explain why diversity is important for the survival of a species?
Answer:
The importance of genetic diversity. More specifically, genetic diversity can be a species natural defence system against disease and survival even under extreme weather conditions but more importantly, genetic diversity can help weed out unfavourable traits in species which maximises opportunities for thriving in any environment². hoped it helped.
Explanation:
Increased genetic diversity leads to increased chance of species survival. Species with a limited variety of phenotypes and where all members of the species are similar to one another have a smaller chance of coping with environmental variability compared to a species with greater diversity.
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In which form of reproduction will pieces of the parent develop into identical copies of the parent?
1.) vegetative reproduction
2.) binary fission
3.) budding
4.)fragmentation
Answer:
4. Fragmentation
Explanation:
Just took the test & Binary Fission was wrong
Budding. Organisms reproduce by splitting off new individuals from existing ones, resulting in genetically identical parent and daughter organisms.
What do you mean budding?Budding is an asexual mode of organism formation. A new organism is formed from a small part of the parent's body during this process. A newly formed bud separates to form a new organism. The newly formed organism remains attached as it grows.To create an advantageous variety (cultivar) and rootstock combination, a single bud from a desirable plant is inserted into an opening in the bark of a compatible rootstock.Budding, also known as bud grafting, is a type of vegetative or clonal plant propagation that produces an exact replica of the parent plant. Chip budding and T budding are two slightly different methods of budding.To learn more about : Budding
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What happened to the cheetahs?
Answer:
Explanation:
The chief threats to the cheetah's existence are loss of habitat, poaching and hunting (their hide and trophies can command top dollar), and getting shot by livestock farmers. Decline of gazelles, wildebeests, impalas and other preferred prey species (also due to hunting and habitat loss) is a factor, too.
There are various subspecies of cheetah. So the cheetah's disappearance would have differing effects in each case. In general terms, however, the cheetah is a predator and hunter at the top of the food chain, so its disappearance would impact its prey and so on down the line.
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Variation is caused by what two factors....????
Answer:
mutation,recombination of genes
Many different types of mutations can occur within the body. Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene. One mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence. Which type of mutation causes this translation error that leads to cystic fibrosis?
silent
missense
nonsense
deletion
Answer:
Deletion
Explanation:
I think it is the last one
Deletion
If it really helped please give me brainliest
A nonsense mutation is one mutation in the CFTR gene that leads to cystic fibrosis causes translation to end earlier in the gene sequence.
Cystic fibrosis is a genetic disorder that is caused by different mutations within the CFTR gene.
The CFTR gene codes for the CFTR protein whose function is as an anion channel (chloride ion) which helps control the movement of water in and out of the membrane of cells that are specialized to produce mucus, sweat, saliva, tears and digestive enzymes
When CFTR protein is defective or absent, thick, sticky mucus accumulates in these cells, obstructing the airways and glands.
The most common mutation of the CFTR gene is a deletion whereby the codon for the amino avid phenylalanine is deleted resulting in the production of a defective CFTR protein.
Another form of mutation in the CFTR gene is a nonsense mutation in which a stop codon is inserted in the middle of the gene resulting in the production of a shortened CFTR protein, which is then degraded by the cell.
Therefore, a nonsense mutation in the CFTR gene leads to cystic fibrosis by causing translation to end earlier in the gene sequence.
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How does the distance from the mainland affect the number of species?
Answer:
Area increases diversity because a larger plot is likely to have more habitats, hence niches, to support a greater variety of species. How does the distance from the mainland affect the number of species? The farther from the mainland you go, the less species richness.
8. Cells carry out either aerobic or anaerobic respiration. Which of the following describes a difference
between aerobic and anaerobic respiration?
a Anaerobic respiration requires oxygen, while aerobic respiration does not
b. Anaerobic respiration requires less carbon dioxide than aerobic respiration
c. Aerobic respiration produces more ATP than anaerobic respiration
d. Aerobic respiration is more commonly carried out by microorganisms
Answer:
C.) Aerobic respiration produces more ATP than anaerobic respiration.
Explanation:
Aerobic respiration is a cellular respiration reaction that requires the presence of oxygen. The electron transport chain in this reaction creates 32 ATP, making for a total of 36 ATP gained by aerobic respiration.
Which shows one example of a physical change and one example of a chemical change?
Show Your Work
boiling water and melting wax
rusting iron and baking a cake
dissolving powder and shredding paper
freezing water and burning coal
An example of physical change is the freezing of water, while an example of chemical change is the burning of coal. Thus, the correct option for this question is D.
What is Physical change?Physical change may be defined as a type of change that only involves alterations in the physical properties of the matter. Examples include the boiling of water, freezing of water, etc.
A Chemical change may be characterized as a type of change that only involves alterations in the chemical properties of the matter. Examples include burning coal, rusting iron, mixing acids and bases, etc.
In a physical change, there is no new substance is synthesized, while in a chemical change one or more new substances are formed.
Therefore, freezing water is an example of physical change, while burning coal is an example of chemical change. Thus, the correct option for this question is D.
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What is enzymes Bc i dont know what that is
Answer:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
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Inhibitory proteins are encoded by what
Answer:
DNA
Explanation:
The DNA has to be transcribed, so it is changed to RNA to make proteins in translation.
An independent variable is the item that was changed in the experiment. What is the independent variable in this experiment?
Answer:
The independent (or manipulated)variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (or responding) variable is the one that is observed and likely changes in response to the independent variable.
Explanation:
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In multicellular organisms, cells are organized into tissues, tissues into organs, organs into organ systems, and systems
to organisms. Select ALL of the organs from those listed
A).blood
B).brain
C.)eye
D.)leukocyte
E.)muscle
Among the listed components, the brain and the eye are the organs. Skeletal muscles are also classified as organs.
What are the levels of the organization?In anatomical studies of an individual, the classification of the hierarchy of the structures of the organism is useful for the estimation of the complexity level of the individual.
The chemical level of organization is the first level of organization where atoms are combined for the formation of molecules. Molecules are combined to form macromolecules.
Different types of macromolecules result in the cellular level of organization. The macromolecules that are the components of cells are called biomolecules.
Cells of the same kind are combined and work in the association as a tissue, for example, nerve cells form nerve tissue.
These tissues of similar functions combine to form organs. For example, multiple nerve tissues are combined to form the brain and the spinal cord.
The nerve cells, nerve tissues, spinal cord, and brain are studied together as an organ system called the nervous system. Several organ systems like this are grouped to form an individual.
Therefore, the brain and eye are examples of organs.
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Who was the marquis de Lafayette?what was his role in the American revolution
Answer: Marquis de Layette was a french aristocrat who served the Continental Army during the Revolutionary War.
Explanation:
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At very high temperatures, most enzymes do not increase the rate of the reactions they regulate. What is the most likely reason for this lack of enzyme activity at very high temperatures?
a.The enzyme denatures and can no longer function properly.
b.The enzyme would have already broken down at a much lower temperature.
c.The products would have already been used up in the reaction by the time it reaches that high temperature.
d.The enzyme would have already sped up the rate of reaction as much as it could and would not be affected by the increase in temperature.
The enzyme would have already sped up the rate of reaction as much as it could and would not be affected by the increase in temperature. Hence, option D is correct.
what is the function of enzyme?
The majority of enzymes are proteins, some are Ribonucleic acid (RNA) molecules.
Enzyme or biocatalyst binds to a substrate form transient enzyme-substrate by declining activation energy to attain the transition site.
Enzymes can either determine in molar amounts or in terms of activity.
The measuring unit include one enzyme unit which refers to the amount of enzyme causing the transformation of 1μmole of substrate per minute at 25˚C under optimal conditions of measurement.
Secondly, the katal is a SI unit of enzyme activity which is the amount of enzyme used to catalyze conversion of 1 mole of substrate per second.
Hence, option D is correct.
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Bromothymol blue (BTB) is a chemical indicator for carbon dioxide (CO2). In the presence of carbon dioxide (CO2), BTB turns from blue to yellow. An aquatic plant was placed into two test tubes containing BTB, and the test tubes were closed with a stopper. Then, one test tube was placed in the dark, and the other test tube was placed in direct sunlight. The test tube in sunlight stayed blue indicating no CO2 was present, while the test tube in the dark changed to yellow. Which statement best explains why the solution in the test tube placed in the dark changed to yellow?
Answer:
Explanation:
Although no options was given, the explanation below should give detail explanation.
The Chemical reactants( internal factors) for the process of photosynthesis are C02 and H20, and enzymes. Other external factors are sunlight and chlorophyll.Therefore for a plant to undergo photosynthesis these reactants must be present in the presence of sunlight.
In the present scenario the plant in the test tube exposed to sunlight must used up the C02 with water and exposed sunlight to produce O2 -the by products and CHO,Protein and Lipids in plants.
Since the C02 has metabolised,no CO2 would be present in the test tube of the plant and the water, hence BTB is negative,blue- no C02.
However,the plants in the dark lacks the supply of sunlight therefore no photosynthesis could occur.Consequentially the C02 is not metabolized,and its concentration is high in the leaf in the test tube placed in the dark.This is indicated as yellow positive by the BTB which change from Blue to yellow.
How is growth different from development?
Answer: Growth is the increase in size and development is a process in transformation.
Explanation:
A student observes that a type of eubacteria contains chlorophyll. Which of these does this type of bacteria have in common with plants?
A. it is photosynthetic
B. it contains vascular tissues
C. it contains mitochondria
D. it is heterotrophic
Answer:
A. it is photosynthetic
Explanation:
A. it is photosynthetic - this is true - chlorophyll is a photosynthetic pigment that traps light energy to power food production. It present in green plants
B. it contains vascular tissues - this is false - eubacteria are single celled organisms that do not form tissues
C. it contains mitochondria - this is false - prokaryotic cells do not contain membrane-bound organelles like mitochondria
D. it is heterotrophic - this is false, plants and many bacteria are not heterotrophic, which means they consume other organisms for their food supply rather than creating their own (autotrophic)
Answer:
The answer is A
Explanation:
AAAAAAAAAAAAAAAAAA
please answer fast !
Answer:
C
Explanation:
C would allow you to understand the cause of why specific people got the disease, and the comparison between those who got it and didn't would be vital in determining why some people got it in the first place.
Isabel is very interested in learning about outer space. She often looks through her telescope at the details of different bodies of our Solar System. What is Isabel doing when she looks at objects using her telescope? A. Predicting B. Experimenting C. Making conclusions D. Making observations
Answer: Making Observations
Explanation:
She’s interested about learning about space, so when she looks through her telescope she’s observing. She wants to see how The bodies look, because she’s interested.
Answer:
D. Making observations
Explanation:
because she is looking/observing the sky
This biome is the most diverse.
A Taiga
B Arctic (Polar)
C Rainforest
D Desert
If something grows,exchanges has, and needs energy but isn’t made of cells and can’t reproduce A it’s dead B it’s living C it’s dormant D it’s non-living
Answer:
D. It is non-living
Explanation:
If something is not made of cells, it cannot be alive.
what is one characteristic of consumers?
a. they create all usable food energy
b. they make their own food
c. they may eat plants and animals
d. they obtain their energy from the sun
Answer: they may eat plants and animals
Explanation:
What is occurring in this picture?
transcription
translation
DNA replication
mutations
Which process makes four daughter cells that are different than the parents cell
This means that prokaryotes are referent o as”_______cells”.
Answer:
Prokaryotes cells
Explanation:
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1) What atoms are found in proteins
Answer:
Here are some atoms that can be found in protein hydrogen, carbon, sulfur, oxygen, and nitrogen.
Hope this helps :)
Protein has been the organic molecule that are polymers of amino acids. Proteins are composed of five major atoms of carbon, oxygen, hydrogen, sulfur, and nitrogen.
What are proteins?Proteins are the macromolecules that are polymers of amino acids. The monomeric units (amino acids) of the protein molecule are linked by the polypeptide bonds. They are involved in the majority of the activities that are crucial for the body to function.
The amino acid, the monomer has been composed of the carboxylic and the amine group that includes the atoms of nitrogen, carbon, oxygen, and hydrogen while the substitutional group may include the sulfur atoms. The carbon is the central atom attached to the other molecules.
Therefore, hydrogen, nitrogen, carbon, sulfur, and oxygen are the atoms of proteins.
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