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What is the role of stomach in digestion of food?
Stomach plays an important role in digestion of food when we eat the food our saliva attached with the food and then the food is going on the stomach and …
Why is cytoskeleton considered to be important organelle in the cell?
Study Cytoskeleton .
What is the purpose of hyphae and mycelium?
They sometimes function as attachments?
What is the immunological mechanism of blood typing test?
and... What is the immunological mechanism of pregnancy test and ovulation test?
How are birds adapted to their function?
They have ossified skeleton with air cavities in the bones and each jaw is covered with horny sheath forming beak.
why inflammation, which is the defense mechanism of body, cause destruction of tissues?
when defense mechanism fails to meet the goal to fight with the toxins produced by pathogens.
What are ways in which human populations change?
A list of ways in which human populations change.
State three arguments for the cloning process and against cloning.
Read Genetic Engineering .
Respiration involves the breakdown of sugar. This process results in the production of energy for the cell. In order for cells to produce the MOST energy, what gas should be present?
Good question.
Read Cell Respiration .
Describe the functions of the longitudinal and circular muscles in annelids.
Which of these muscles are not found in nematods?
Explain how cells release energy through glycolysis, respiration, and fermentation. Identify pathways in each stage. Describe each stage’s role in releasing energy.
Study Cell Respiration .
What are the abiotic and biotic changes in primary and secondary succession?
Also, how are these changes similar and how are they different?
Arthropods being more advanced than annelids why they posses less advanced type of circulation?
Study Zoology Review - Questions and Answers for Biology Exams .
What is ecological limit and the size of population?
It is related to the population ecology.
How can biodiversity conservation and photosynthesis participate in moderating global climate change?!
I do not know the answer .
What are 3 layers of flatworms?
scolex(head); neck; strobila
Why the term plant is appointed for autotrophic organism?
I am in BS_hons microbiology this is a question related my enrolled course plant and tissue culture
why plants are called plants?
i need a logical answer …
What is innate immunity and its features?
Study The Immune System .
How does the pollen mother cell develop into a mature pollen grain?
Study Angiosperms .
Why is the mature pollen grain called the male gametophyte
The pollen grain has three nuclei.
Which description represents the affects of osmosis on a plant cell when the concentration of sugar particles is greater inside the cell than outside?
The diffusion of water through a selectively permeable membrane is called osmosis.
A) water diffuses into the cell, and the cell swells
B) water …
What would happen if reproductive cells reproduced mitotically?
Study Gametogenesis .
What happens to FSH levels if fertilisation does occur and why?
Would they increase or decrease?
How does PSll go about phosphorylating ATP molecules?
How does P680 contribute in the phosphorylation of ATP molecules in the light dependent stage of photosynthesis?
Is it correct to say that all of the genes required for female sexual development is located on the X chromosome?
In humans, ……
A. All of the genes required for female sexual development are located on the X chromosome
B. the SRY gene, located on the Y chromosome, …
How are the Nucleus, DNA, M-RNA, T-RNA, Ribosomes, Proteins, Amino Acids, and Traits Related?
They work Together in Protein Synthesis?
Carbon dioxide is not formed in anaerobic respiration in _________
Read Cell Respiration .
Why do we only look at 665 nm on the spectrophotometer, and what is this wavelength associated with?
We were measuring chlorophyll and such, but why only at 665 nm?
At what concentration of ATP in a cell willing it stop producing ATP?
In a muscle cell atp is used to start the process of contraction. I'm looking for information for the concentration of atp in the body when rigor motis …
What is meant denaturation of an enzyme?
Study Protein Structure .
Rapid cytokine temporal changes
Hi, I am wondering if there are cells in which the secretion of cytokines can be modulated quickly. Or cells that can rapidly (in minutes) secrete cytokines …
What part of a neuron is responsible for speed transmission of electrical nerve impulse ?
You can find answer on Nervous System .
What are some characteristics of mammals?
Warm blooded, perform gas exchange.
What is the significance of primary structure of proteins?
Why is primary structure important?
Explain why, in the presence of cyanide, lactate is produced but not carbon dioxide?
This is because reduced NAD is not oxidised since oxidative phosphorylation is stopped.
What are the physiological processes that determine the rate of dry matter accumulation of plants?
The levels of organization ranging from subcellular to whole crop canopies.
How can an organism undergoe respiration and create ATP energy even when very little glucose is ingested?
Specific as possible!
In a diploid plant, which of the following structure(s) is/are triploid?
a. leaf
b. endosperm
c. pollen
d. egg
e. petals
Does electron transport chain shows anaerobic degradation of pyruvic acid?
Study Cell Respiration .
Where did life originate first? Why?
Is it in ocean?
Enlist the excretory products and which is the most toxic.
Study The Excretory System .
Describe how the quantities of enzyme, substrate, and product in a single test tube change over time.
Study Enzyme Activity .
What is the term for a cell that is no longer functional?
Non-contagious?
Bent?
Broken?
Contaminated?
Cancerous?
A planarian has a nervous system. Do you think a planarian can learn?
Study Flatworms Review .
Describe the impact cellular respiration has on other organisms and the environment.
Study Cell Respiration .
How do fishes do gas exchange?
Fishes have a pair of kidneys that filtrate the blood. Bony fishes excrete nitrogen as ammonia, NH3, (they are ammoniotelic) and cartilaginous fishes excrete …
Uniqueness of diploid number of chromosomes
1) How and reasons to maintain diploid chromosomal number from one generation to another.
2) How and reasons to produce gametes with haploid number …
What happnes to protons pumped into the inner membrane space by the electron transport chain?
Study Cell Respiration .
What is nervous and sensory structures of crustaceans?
Crustacean is class from phylum Arthropod.
Describe the synthesis of melanin in skin pigmentation for black and white people.
What are the five layers of the epidermis?
What organisms would appear as succession progresses?
I don't know what the answer is. Can you help me?
What are the types of epistasis and their examples in animals?
Study Epistasis .
How long are viruses highly contagious?
Study Viral Infections .
Outline how a gene from another species can be inserted into E. coli.
Study Genetic Engineering .
What two major enzymes are involve in genetic engineering and what are their jobs?
Read Genetic Engineering .
What are the examples of funaria?
Study Moss .
What is the structure of cytoplasm with unknown function and distributed throughout the length of the body in a sporozoite of plasmodium vivax?
Ans: convoluted tubules are the structures with unknown functions in the sporozoite.
What does the circulatory system do?
It pups blood but does it do anything else? How?
What is a pyramid of biomass?
is it a pyramid of the total mass of an organism in a given area?
Why bacterial cell_membrane act as respiratory structure?
Study Bacterial Cell .
Where are protein-synthesizing instructions stored on a DNA molecule?
Study Protein Synthesis Made Easy .
How is genetic engineering beneficial to other fields such as medicine?
Genetic engineering could possibly lead to more advanced medicine. Scientists could manipulate substances using genetic engineering to make the perfect …
How would decreasing a population affect energy flow?
Read Food Chain and Trophic Pyramids .
Why don't the two cells made in mitosis have identical cytoplasm?
Cytoplasm division happen in cytokineses.
Which group of mollusca have the most roomy mantle cavity?
Study Mollusca - Study Guide .
What is the function of mitosis and cytoplasmic division?
Study Cell Division .
In what way is incomplete dominance an exception to the concept of dominance? Could multiple alleles be an exception to the concept of dominance? Why or why not?
Study Non-mendelian Inheritance .
Why do chromosomes appear double at the beginning of cell division?
Read Cell Division .
Why do we say that cellular respiration is such an efficient process?
Read Cell Respiration .
For tissue building during growth phase human body requires additional ammount of nutrients?
A. Protein only
B. Protein and energy only
C. Protein, energy and micronutrients
D. Protein, energy and dietary fibre
which of the following organ systems does not have direct contact with the external environment?
1. reproductive
2. respiratory
3. excretory
4. digestive
5. circulatory
What happens in the cells when the carbon dioxide and water meet in the cells?
What happens in the cells when carbon dioxide and water meet in the cells?
What are factors that determine biomass succesion, and how they determine it?
fire, climate, urbanization ....
How does powering of vehicles with fuels help to reduce air pollution?
Hydrogen readily combines with oxygen to form water, this water is now used to power vehicles, how does this help to reduce air pollution.
Difference between haploid and diploid of aster and spindle fibres?
Study Cell Division .
Briefly describe the factors that affect the activity of enzymes ?
I need answer of this question.
Why induced fit model is more acceptable than lock and key model?
Study Enzyme Activity .
Organisms that carry out the process of photosynthesis use the glucose for what?
Study Photosynthesis Process - The Easiest Online Review .
How does the foot differ in the 4 classes of mollusks?
Read Mollusca - Study Guide .
Name and briefly describe the 4 classes of mollusks?
Study Mollusca - Study Guide .
Can there be 4 phosphates in cellular respiration? There are 2 in diphosphate and 3 in triphosphate but can there be 4?
Kids in my bio class asked me.
Which properties of enzymes are represented by the lock and key mechanism?
Study Enzyme Activity .
Do lysosomes depend on another organelle to digest food?
Read Intracellular Digestion - Lysosomes and Apoptosis .
Why does a tapeworm not require a circulatory system?
Because they use simple diffusion to obtain materials/nutrients from the host.
Difference between the the mitosis that takes place in somatic cells and the mitosis that takes place in embryo.
Interphase is long in somatic cells whereas interphase is short in embryonic cell.
Respiration is viewed most simply as the oxidation of ATP. Justify the statement.
Respiration refers to the breaking down of c-c bonds through oxidation within the cells and the energy is released in a series of slow steps wise reactions …
What is the karyotype found in breast cancer? Where is the disorder occurring?
No matter how much i search, I cant find the answer.
How do bivalves gastropods protect themselves?
Read Mollusca - Study Guide .
My B blood type would have what type of glycoprotein complex?
It should be b and rh.
What are the three hormones released during puberty stages?
Progesterone, oestrogen and testosterone?
How can we produce genetically engineered human insulin?
Read Genetic Engineering .
How does the enzyme lowers the activation energy?
How does enzymes lowers the activation energy?
How to find the recombination frequency?
How to calculate recombination frequency, I mean how can we calculate gene distance from recombination frequency if we don't know how to calculate or find …
Why human do not have antibody for Rh factor?
Rh factor & antibody.
What is passive transport?
Is it related to active transport.
Compare the locations of myelinated and unmyelinated nerve fibres in the brain and spinal cord.
Compare the locations of myelinated and unmyelinated nerve fibres in
the brain and spinal cord.
Properties of antigens that makes them to be recognised by the immune system
properties of antigens
What is the structure and function of the male reproductive system?
Read Reproductive System .
Describe the functions of meristem, xylem and pholem.
Study Plant Tissues .
What is the transition of frogs from land to water?
What are the problems that they are facing?
What are the five phyla of kingdom fungi?
Read Fungi Kingdom Review .
Why are living organisms classified?
Read Life Kingdoms - Monera, Protista, Fungi, Animalia, Plantae, Virus .
Plant tissues usually contain a wide variety of vitamins, what is the role of these vitamins with respect to enzyme activity?
Considering the specificity of enzymes with respect to their substrate requirements, briefly explain the mechanism of enzyme action.
How is the weakened virus structurally different from the normal virus?
read Viruses - Definition, Structure, Genetics and Replication .
What type of cell division occurs in the vascular cambium and why is it important to the woody plant?
What kind of cell division occurs?
Describe the feature of each order of mammals.
Read Mammalian .
What is the law of segregation?
Study Genetics .
What is the difference between bryophytes and tracheophytes?
Study Plants .
Why do you think in humans there is no viable trisomes of chromosome one?
Read Karyotype and Genetic Diseases .
Explain what is meant by referring to the cell membrane as a selectively permeable membrane.
Study Cell Membrane .
Give an example of an organism which performs cutaneous respiration name also the phylum to which it belongs.
Study Zoology Review - Questions and Answers for Biology Exams .
Give one advantage of the cylindrical body of earthworms? Which other feature help the same function?
Biological question
Can two brown eyed people have a blue eyed baby?
Read Genetics .
Differece between purine and pyrimidine?
Study Nucleic Acid .
What is the shape of the pyramid of biomass in aquatic ecosystem?
it is inverted in shape as the size of fishes is much larger than the size of phytoplankton, size of producer is less than consumers.
How many chambers do aves heart have?
Read Birds .
List three extraembryonic structures.
Study Extraembryonic Membranes .
List the attributes that populations but not individuals possess.
Read The Ecosystem .
What is the difference between a autotroph and a heterotroph?
The difference between the autotroph is that they reproduce then a heterotroph would because the heterotroph does not reproduce over and over again only …
Which of the following are isomers?
A. glucose and fructose
B. glucose and sucrose
C. lactose and maltose
D. sucrose and glucose
Which describes a disruption in the water cycle that could affect photosynthesis?
A)Heat causes an excess of transpiration.
B)Heat causes an excess of evaporation.
C)Heat causes an excess of condensation.
D)Heat causes an excess …
In a food chain, energy does not flow directly from...
producer to decomposer
produce to consumer
consumer to decomposer
consumer to producer
What causes a high crossing over frequency?
Can you answer my question please!!
Why does fermentation only produce 2 ATPs and aerobic respiration produces 36?
Study Cell Respiration .
How are anti codons made for the complementary mRNA codons and attached to tRNA?
Study Nucleic Acid .
Which openings occur on flowers, leaf edges, shoots, cell walls and embryonic sac?
What are functions of the openings in question above?
How does oxygen pass from blood to mitochondria?
Also ,
How do ribosomes and mitochondria help the cell (pancrease) to make enzymes?
What is the advantage of a digestive tract as compared with a digestive cavity?
Study Digestion System and the entire Zoology Review - Questions and Answers for Biology Exams .
Give two mammalian & reptilian characters in Duck-Billed Platypus.
Read Mammalian .
How does the organism break down and absorb food in Arthropoda?
Study Phylum Arthropoda .
What are vitamins?
Any of a group of organic compounds which are essential for normal growth and nutrition and are required in small quantities in the diet because they cannot …
Name two essential biological molecules in which oxygen is present.
Study Biochemistry Review - Questions and Answers for Biology Exams .
If the chromosome no. of a cell at the beginning of a interphase is 12, what would be its chromosome no. at the end of the interphase?
They say there are "2n" "ploidy" before the G1 stage of inter phase; which after S phase becomes "4n" ploidy.
So what is 'n' here? is it the single …
What is meant syncarpous?
Study Angiosperms .
What is co-dominance and how does it relate to blood groups?
Study Non-mendelian Inheritance .
In what trophic level of the food pyramid are consumers greatest in number?
a. first trophic
b. second tropic
c. third tropic
What is the distance between a nerve and synaptic cleft at the neuromuscular junction?
Distance based on electron microscopy.
Study Nervous System .
What is the distance between a nerve and synaptic cleft at the neuromuscular junction?
Distance based on electron microscopy.
The production of cells during mitosis into specialized function is called?
Read Cell Division .
The F2 generation is the direct offspring of the?
Study Mendel's Laws .
Do penguins have knees?
Study Birds .
What happens to plant life if there is no CO2 to convert to oxygen?
Does all the plant life die?
What is saprophytism and epiphytism?
Study Symbiosis .
Two major components of the digestive system are?
Read Digestive System .
How nutritive theory, hormonal balance theory and vascular coonection theory explain apical dominance?
There are theories which explain apical dominance.
Name four protozoan diseases or viral diseases?
Study Diseases .
What is the rod-like material found in bacterial cell walls?
Is it amino acids?
Which lymphoid organ atrophies after adolescence?
What is its the primary role of atrophies?
What is the one attribute observed in the life cycle that is common to all animals?
Not sure what the answer to this is maybe something to do with cells?
What is a difference between cohesion and adhesion?
A) Only adhesion is involved in transpiration pull.
B) Only cohesion is involved in the movement of water in soil.
C) Only cohesion involves the interaction …
When do scientists think that life originated on earth?
1 billion years?
What are the two chambers of the fish heart and what do they do?
Study Fish Facts .
With the help of an example explain how two allelic pairs affect the same characteristics.
Study Non-mendelian Inheritance .
How effictive is our digestive system compared to animals and insects?
Study Digestive System .
Advantages of asexual vs sexual reproduction.
Study Microbiology Review - Questions and Answers for Biology Exams .
Explain in terms of the protein (antigen/antibody) found in group O blood and why it is called universal donor.
type A, B, AB and Type O.
Male to male transmission is a key feature of which pattern of inheritance?
A man does not transmit his X chromosome to his sons so that an X-linked disorder cannot be passed from father to son. Usually autosomal recessive disorders …
What is the syndrome caused when karyotype matches is incorrect?
Study Karyotype and Genetic Diseases .
How would you assess the importance of the excretory system in the over-all functioning of a human being?
Study The Excretory System .
How long does a protein take to be synthetized?
Between 20 seconds and several minutes. Reference: Alberts, Molecular biology of the Cell, page 381.