The process of photosynthesis adds oxygen to the atmosphere. Option C is correct for the given statement. In the atmosphere, nearly 21% oxygen is present.
What is the gas constituent of the atmosphere?In the atmosphere, different gases such as oxygen, nitrogen, carbon dioxide, and water vapour are present. These differ in composition, with oxygen accounting for 21%, nitrogen accounting for nearly 78%, and carbon dioxide accounting for less than 1%.
The oxygen is produced by the process of photosynthesis that is undertaken by green plants. The phytoplankton, algae in aquatic habitats, and plants of the terrestrial ecosystem do photosynthesis because of the presence of chloroplasts.
This oxygen is used by animals and plants for cellular respiration. Others are incorrect options because forest fires increase carbon dioxide in the atmosphere, animals take oxygen from the atmosphere, and rock weathering does not add oxygen.
As a result, option C is the correct answer because photosynthesis produces oxygen for the atmosphere.
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Human egg and sperm cells contain 23 chromosomes and are called______
A. gametoploid
B. devoid
C. haploid
D. diploid
Answer:
Haploid
Explanation:
Human egg and sperm cell contain 23 chromosome and are called haploid.
Answer:Haploide
Explanation:
What is the ultimate source of energy for all living things? A. Food B. The sun C. Water D. Oxygen
Answer:
B, The sun.
Explanation:
The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers, such as plants and algae, use energy from sunlight to make food energy by combining carbon dioxide and water to form organic matter. This process begins the flow of energy through almost all food webs.
g Knowing if a bacterium is Gram-positive or Gram-negative is important in medicine because it tells us what type of antibiotic will be used (e.g., penicillin for Gram-positive bacteria and mycins, like streptomycin, for Gram-negative bacteria). Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a True b False
Answer:
This is true.
Explanation:
Knowing whether a bacteria is gram positive or negative will help to narrow down the types of pathogen it could be and will determine which antibiotics will be effective against it.
Knowing whether a bacteria is gram positive or gram negative will help to understand the kind of infection it may cause and thus help in determining the kind of antibiotic it needs.
What are gram-positive and gram-negative bacteria?The bacteria that have a thick layer of peptidoglycan but no outer lipid membrane are called Gram-positive bacteria. The bacteria that have a thin layer of peptidoglycan and an outer lipid membrane are called gram-negative bacteria.
Gram-positive bacteria do not have an outer lipid membrane and hence they retain the crystal violet in the thick peptidoglycan during gram staining and it is fixed by iodine.
The outer lipid membrane that is possessed by the Gram-negative bacteria does not allow them to retain the crystal violet and hence only the counterstain safranin is visible in the gram staining method.
The technique of Gram staining was developed by the bacteriologist Hans Christian Gram in 1884. While this method cannot tell the specific strain of a bacteria, it can be used as a quick and easy way for narrowing down the basic criteria of distinguishing the bacteria among the two main groups.
Therefore, knowing whether a bacteria is gram positive or gram negative will help to understand the kind of infection it may cause and thus help in determining the kind of antibiotic it needs.
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PLEASE ANSWER ASAP I WILL GIVE YOU BRAINLIEST AND GIVE FREEEE POINTSSS AFTER
Describe each of the following types of reactions and give one example of each: combustion, synthesis, decomposition, single replacement, double replacement.
Answer:
The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories. Some reactions will fit into more than one category.
If one strand of DNA has the sequence 5'ATCG 3', what would be the sequence of the matching DNA strand
Answer:
Each strand is made up of a sequence of four nucleotides, A, C, G, and T. The order of the nucleotide sequence encodes genetic information. Since the nucleotides pair in a predictable way — A with T, and C with G — each strand of the DNA is always complementary to the other.
Answer:
3' TAGC 5'
Explanation:
A-T, C-G
Help plz plz plz plz plz plz plz plz plz can someone tell me the percentage
A car breaks down 2.1 m from the shoulder of the road. 1.99x103 N of force is used to push the car off the road. How much work has been done on the car?
Answer:
Joules
Explanation:
W = F * d
F = 1.99*10^3 N
d = 2.1 m
W = 4179 Joules
someone please help asap!!
Answer:
b
the graph has a positive gradient
balance the following chemical equation making sure to apply the principle of the law of conservation of mass
Answer:
2Zn+ 4HCl=2ZnCl2 +2H2
CH4+2O2=CO2+2H2O
Fe + 3NaBr=FeBr3+3Na
The balanced chemical equations are given below:
[tex]Zn + 2HCl[/tex] → [tex]ZnCl_2[/tex] + H2. [tex]CH_4 + 2O_2[/tex] → [tex]CO_2 + 2H_2O[/tex]. [tex]Fe + 3NaBr[/tex] → [tex]FeBr_3 + 3Na[/tex]. What do you mean by Chemical equation?Chemical equations may be defined as an illustration of a chemical reaction by using symbols and the amount of substance used in the reactant to form a desirable product.
In the first reaction, two atoms of hydrogen are there on the product side while only one is there is the reactant side, so to balance them, you put 2HCl, the reaction is balanced now.
In the second reaction, four atoms of hydrogen are there on the reactant side while only two are on the product side, so to balance them you put 2H2O on the product side, now balance the oxygen atom and put 2O2 on the reactant side. The reaction is balanced now.
In the third reaction, bromine has three atoms on the product side, to balance them you need to put 3NaBr on the reactant side, now to balance sodium atoms put 3Na on the product side. The reaction is now balanced now.
The principle of the law of conservation of mass states that mass is neither be created nor destroyed in chemical reactions.
Therefore, the balanced chemical reactions are described above.
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Which statement provides the best description of the relationship between
primary consumers and producers?
A. Primary consumers provide producers with the chemical energy
they need
B. Primary consumers eat secondary consumers, which rely on
producers for food.
C. Producers and primary consumers compete with each other for
food sources.
D. Producers provide primary consumers with the chemical energy
they need
SUBMIT
D. Producers provide primary consumers with the chemical energy
they need
please answer 5,6, and 7 for 20 points plus brainliest :) link=reported, those dont help
Which two systems work together to make your body move?
a.digestive system and integumentary system
b.lymphatic system and digestive system
c.nervous system and excretory system
d.skeletal system and muscular system
Answer:
The answer is D. skeletal system and muscular system.In the musculoskeletal system, the muscular and skeletal systems work together to support and move the body. The bones of the skeletal system serve to protect the body's organs, support the weight of the body, and give the body shape.
Question 9 help please
Rats can be a real danger when they find
their way into your food storage spaces? yes or no
Answer:
yes, it could be something that's old or something rats cant eat/drink
Explanation:
how is sound recorded
Answer:
Sound is made up of waves in the form of vibrations in the air. Or you can use the signal to record the sound on magnetic tape. This works by a similar process of moving a magnet, but that magnet causes a magnetic tape to gain magnetization in patterns that represent the sound.
In a digital recording system, sound is stored and manipulated as a stream of discrete numbers, each number representing the air pressure at a particular time. The numbers are generated by a microphone connected to a circuit called an ANALOG TO DIGITAL CONVERTER, or ADC.
hope this helps
have a good day :)
Explanation:
Answer:
sound is made up of waves in the form of vibrations in the air, and can be detected by the human ear. Using magnets analoque technology takes sound waves and turns them into electrical pulses. When a metal conductor is moved inside the magnetic field an electric current is produced in that wire.
Explanation:
How does the age of a tree relate to its size?
Answer:
Árbol de envejecimiento fórmula La fórmula de envejecimiento del árbol puede estimar la edad de un árbol multiplicando el diámetro del árbol por su factor de crecimiento. Es más exacto con bosque y árboles rurales en lugar de árboles urbanos, que a menudo se cultivan en condiciones menos ideales que pueden atrofiar su crecimient
Answer:
If you know when the tree was planted, you can easily and accurately determine its age. The second most accurate way to estimate tree age is to count the annual rings of wood growth. Annual rings can be counted using two different methods. You can extract an increment core from the tree using an increment borer.
Explanation:
what is a nucleic acid that contains the genetic information for heredity in most organisms.
Answer:
deoxyribonucleic acid Or ( DNA)
Explanation:
DNA contains the genetic information for heredity in most organisms.
Have a wonderful Day!
Answer:
there's all the answers
Explanation:
select the true statement about dehydration synthesis or hydrolysis
1.) during hydrolysis, an enzyme joins two water molecules, producing polymer
2.) during dehydration synthesis a water molecule breaks apart two monomers
3.) during dehydration synthesis and enzyme joins two monomers water is a byproduct
4.) during hydrolysis, a monomer breaks apart into two polymers,water as a byproduct
The true statement is that during dehydration synthesis, an enzyme joins two monomers and water is a byproduct.
WHAT IS DEHYDRATION SYNTHESIS:
Dehydration synthesis is a reaction that involves the joining together of two or more smaller molecules to form a much larger and complex molecule accompanied by the release of water (H20). During dehydration synthesis, the hydrogen (H) of one monomer combines with the hydroxyl group (OH) of another monomer releasing a molecule of water.An example of dehydration synthesis is the reaction of glucose molecules to form larger polysaccharides.
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To reproduce , female elephants produce eggs and male elephants produce sperm. Off spring are produced by the fusion of an egg with a Sperm cell . Which statement is true about the offspring?
Answer:
Answer: C. The offspring are genetically distinct from the parents because they are produced by sexual reproduction. Explanation: Sexual reproduction occurs through the fusion between an egg and a sperm cell
how planaarians able to survive without resoirtiry and circulatory system
Answer:
they possess different adaptive features
What is the role Of DNA ligase in the elongation Of the lagging strand during DNA replication?
a. It stabilizes the unwound parental DNA.
b. It unwinds the parental double helix.
c, It joins Okazaki fragments together.
d. It synthesizes RNA nucleotides to make a primer
Answer:
C
Explanation:
Ligase is like GLUE so yea
Please if you can help me with the food biotechnology book by Jonathan Delgado and Javier Rocha
Answer:
send me the questions, i'll help.
Explanation:
How does the ear pick up sound waves from the external environment? (any bots or links added will be reported!)
Answer:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.
Explanation:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.Answer:
Explanation:
Most typically, the order in which the steps of scientific investigation are applied is:
a. Controlled experiment, hypothesis, analysis of results, observations, questions,
conclusions
b. Observations, controlled experiment, hypothesis, analysis of results, conclusions,
questions
c. Questions, observations, hypothesis, controlled experiment, analysis of results,
conclusions
d. Questions, observations, analysis of results, controlled experiment, conclusions,
hypothesis
Answer:
C
Explanation:
An E. coli cell contains about 15,000 ribosomes, which carry out protein synthesis. Assuming ribosomes are spherical and have a diameter of 20.0 nm, calculate the fraction of the E. coli cell volume that is occupied by ribosomes.
Answer:
14.57%
Explanation:
From the previous lesson, we understood that the Volume of E.coli = 4.13 × 10⁻¹⁹ m³
The diameter of the ribosome = 20 nm
Radius will be D/2 = 20 nm/2 = 10 nm
The volume of the sphere since the shape of the ribosome is spherical = 4πr³
∴
The volume for each ribosome = 4πr³
For 15000 ribosome, we have:
[tex]= 15000 \times (\dfrac{4}{3}\pi) ((10^{-8})^3)[/tex]
[tex]= 15000 \times (\dfrac{4}{3}\pi) (10^{-24})[/tex]
= 6.283 × 10⁻²⁰
Thus, the fraction of E.coli volume occupied by the ribosome can be determined by using the formula:
[tex]= \dfrac{Vol. \ of \ ribosome}{Vol. \ of \ E.coli}\times 100[/tex]
[tex]= \dfrac{6.283 \times 10^{-20}}{4.31 \times 10^{-19}}\times 100[/tex]
= 14.57%
Rickettsia typhi is a species of infectious bacterium that is an obligatory intracellular parasite. This means that, similar to viruses, R. typhi cannot reproduce and survive outside of a eukaryotic cell. Why do we consider viruses nonliving, but rickettsia alive
Answer:
Due to its characteristics.
Explanation:
We consider viruses are nonliving, but rickettsia are living because rickettsia have the characteristics of bacteria which is a living and has unique structure. It also survives outside the living cell but not for long time. The rickettsia remain in their shape and does not form crystalline structure like viruses outside the cell. If there is suitable environment for rickettsia, it can survive in that environment.
The most common living bacteria today are
Answer:
eubacteria.
Explanation:
Ribbon and molecular surface renderings of just the enzyme in 4SKN (with and without the DNA substrate) indicate that ________ is bound in a deep active site, while a ________ loop stretches across the top of the active site and interacts with the DNA substrate.
Answer:uracil, hydrophilic
Explanation:
The borders of plates never change. True False
Answer:
Explanation:
False
Answer:
false
Explanation:
What process takes place at the boundary between the capillaries and the alveoli?
AIR
Bronchiole
Alveoll
Small blood
vessels (capillaries)
A. An exchange of blood and lymph between the circulatory and
lymphatic systems
B. An exchange of oxygen and carbon dioxide between the
circulatory and respiratory systems
C. Reabsorption of water into the circulatory system from the
excretory system
D. An exchange of air between the circulatory and respiratory
systems
Answer:
B because aveoli are part of the lung Branch and capillaries take in the oxygen with blood?
Explanation: my guess since carbon dioxide also needs to be excreted out of lungs.