A table comparing the biological characteristics of the five classes of immunoglobulins is shown below. Answer yes or no in the spaces provided, (You can draw the table in your answer paper) Biological activity a) Activates classical complement pathway b) Present on the membrane of the mature B IgG Iga IM IgE IgD cells c) Present in secretions d) Induces mast-cell degranulation e) Crosses placenta

Q: Draw a cell during the steps of Meiosis I (prophase, metaphase, anaphase, and telophase). Give the c...

A: Crossing over is the swapping of genetic material occurs during cell division.In meiosis I crossing ...

Q: How can evolution be scientific when no one was there to see it happen?

A: In biology, evolution refers to changes in an organisms' features over numerous generations as a res...

Q: I don't understand, pls help ASAP!

A: The beta-sheet of the spider comprises the alanine.  

Q: What is DNA methylation? When we say that DNA methylation is heritable, what do we mean? How is it p...

A: DNA methylation is a process of the addition of methyl groups to the DNA molecule that alters the fu...

Q: The cell cycle Illustrate the role of the cell cycle (mitosis) and differentiation in producing and ...

A: Every cell has a nucleus, which contains the genetic material, DNA. Genes are Deoxyribonucleic Acid ...

Q: What do you think is/are the most reliable criteria for determining muscle homologies? Are muscle na...

A: Homology is similarity in structure, it's physiology, which are been gained from the evolutionary an...

Q: The presence of a dimple on the cheek is governed by a dominant gene. A couple had already 4 childre...

A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous c...

Q: Fill the table below, indicate at least one possible error in each phase during mitosis Phase Possib...

A: Mitosis is also referred to as equational division. In this process, the replicated chromosome are d...

Q: Do you think circumcision should be illegal?

A: Circumcision is a surgical procedure that includes removal of foreskin of penis. 

Q: The diagram shows the movement of Na' ions out of a cell. High Concentration Low Concentr ation Na* ...

A: Cell membranes possess two qualities -  They are semi permeable  They are selective Movement of mo...

Q: Which of the following changes in morphology or physiology are likely to happen as an organism gets ...

A: Answer :- Option (H) is correct. - All of the above. - The changes in morphology or physiology are l...

Q: 3. Hershey-Chase (1952) The Definitive Proof Hershey and Chase utilized phages in their research. A ...

A: Answer 1- DNA molecule causes transformation.   DNA (not proteins) can transform the properties of c...

Q: Which of the following is an example of pasteurization?   A surgeon washes her hands before surgery....

A:   Pasteurization :- It is the heat treatment or thermal process in which the harmful microbes or pa...

Q: Compare and contrast trophic levels, food chains, and food webs. How are these concepts related, and...

A: Food Chain : The transfer of food energy from the soured in plants through a series of organisms wit...

Q: What is the dialysis tubing selective permeable to? Make a claim and support it with evidence? 2. Wh...

A: 1) The dialysis tubing is selectively permeable to substances like water, glucose, and iodine , thes...

Q: What are two obvious features of interphase in plant or animal cells?

A: The interphase represents the duration between two succesive mitotic divisions. It is the period in ...

Q: The extensive surface area of root systems is important for- O absorption of light for photosynthesi...

A: There are three types of root systems in plants: Taproot which is larger and grows faster, found in ...

Q: How is paracrine regulation similar to endocrine regulation? How does it differ?

A: Hormones are the chemical messengers that exert effects on the target cells.

Q: 2. Color blindness is a sex-linked recessive trait in humans. A woman who is a carrier for color bli...

A:

Q: Which of these would be evidence against endosymbiosis? a) chloroplast have their own DNA O b) their...

A: Endosymbiosis: It can be defined as a relationship between two organisms where one organism lives in...

Q: Question 3: A woman suffers from albinism and is also a carrier for haemophilia. Draw a well- labell...

A:

Q: 3. Hershey-Chase (1952) The Definitive Proof Hershey and Chase utilized phages in their research. A ...

A: Hershey and Chase blending experiment gave unequivocal proof that DNA is the genetic material.

Q: 3. Hershey-Chase (1952) The Definitive Proof Hershey and Chase utilized phages in their research. A ...

A: Alfred Hershey and Martha Chase in the year 1952 demonstrated that DNA is the genetic material. In t...

Q: Please study the diagram above on eukaryotic gene expression. In order to provide instructions for g...

A: EXPLANATION : Noncoding DNA is also found within most of the eukaryotic genes. Such genes have a spl...

Q: One of the concerns with GMO is the toxicity of product by GMO when consumed by humans. Suppose that...

A: Translation is the process by which protein is synthesized by ribosome from the genetic codon presen...

Q: What are DNA methyltransferases (DNMTS) ?

A: Enzymes are protein molecules that aid in increasing the rate of metabolism and chemical reactions i...

Q: Coal miners inhale large quantities of fine coal dust when they are working in the mines. Over the y...

A: Introduction: Coal miners are at a very high risk of developing lung disorders such as pneumoconiose...

Q: Land-based species are more at risk of extinction than freshwater species. True False

A: Answer : False. Reason: Infact, it's actually the opposite which means freshwater species are at mor...

Q: Fill in the cells below showing the NORMAL process of meiosis of the male's sex chromosomes (XY – th...

A:

Q: List down how many ways can arrange the parts of the structure of nervous system.

A: The nervous system is the main command center of the body and it controls all the major functions, r...

Q: How Do Species Form in Hawaii’s “Natural Laboratory” of Evolution?

A: Hawaii islands are located in the central pacific ocean.

Q: Please answer fast 1:10 dilution is made of a solution. DRAW how you would make a further 1:10,000 ...

A: Make a 1:10 dilution of a 1M NaCl solution, so mix the one "part" of the 1M solution with nine "part...

Q: How Are Bird Populations Changing at Hakalau Forest?

A: The type of ecosystem showing wide patterns of biodiversity as well as comprises of large trees can ...

Q: This diagram shows a _______ and the green things being released into the space are _____. A. cardia...

A: The branch of biology associated with studying the functions of living organisms’ body can be referr...

Q: In glycolysis and the Krebs cycle, electrons are removed from glucose and taken up by molecules + li...

A: In glycolysis and the Krebs cycle, electrons are removed from glucose and taken up by molecules + li...

Q: Under what circumstances might asexual reproduction be more advantageous than sexual?

A: Reproduction is the process by which an organism produce there offsprings. Actually by the reproduct...

Q: Draw a typical climate diagram for a tropical rainforest. Label all parts of the diagram and describ...

A: The tropical rainforest climatograph includes average rainfall and temperature information, whereas ...

Q: Phases of the cell cycle (Mitosis)                Anaphase Centromeres divide. Single-stranded chro...

A: INTRODUCTION Mitosis This is a process by which a single cell divides into two identical daughter ce...

Q: Draw the structure of an antibody molecule(a typical IgG)and show how this structure enables it to b...

A:

Q: What is an evolutionary tree? Is there a precise evolutionary tree known by science that explains th...

A: Evolutionary tree also known as phylogenetic tree: it is a map/chart that gives the visual view that...

Q: 2. What is the difference between aerobic respiration and anaerobic respiration? Why would a cell ch...

A: The cell is life's smallest structural and functional unit. It is a simple machine that houses all o...

Q: Why do gram-positive bacteria not produce endotoxins?

A: ExotoxinsThey are proteineous substances that are produced within the bacterium as a byproduct of gr...

Q: 73. which of the following atoms or groups are not found in an amino acid? carboxyl groups (-COOH) ...

A: 73/ Option 3 i.e. NH2 group  

Q: What method of insect pest control do you prefer? And why?

A: Pest control is the treatment or control of a pest species, a species of the animal kingdom that has...

Q: A substance or an agent in the environment that increases the chance of genetic alteration and cance...

A: Answer Malignant tumor 

Q: Name the four veins in extremiFes which are not paired with an artery (HINT: There are 2 in the arms...

A: Introduction: Blood channels that transport blood from organs to the heart are known as veins. All v...

Q: Surgery remains a mainstay in the treatment of many forms of cancer, but it is no longer used in dia...

A: The statement is False.

Q: Is plastic surgery good

A: Yes in case anyone wants to improve the esthetics of a certain parts of the body, plastic surgery is...

Q: Identify the type of graph that is most suitable to visualize results in each. 1. Number of reporte...

A: 1-Number of reported.... Bar graphs allow to easily sort bit sets of qualitative categories to make ...

Q: For each of the following situations, indicate which type(s) of lymphocyte(s), if any, would be expe...

A: The lymph vessels enter the nodes at the outer edge, between the capsule and the cortex, and also pe...

Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.