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Q: Consider the results of a three point linkage mapping testcross between a female (AaBbCc) and a mal...

A:  We know that test cross is performed always between the F1 progenies and recessive parents. So here...

Q: In general, what are the effects of histone acetylation and DNA methylation on gene expression?

A: Introduction  Expression of gene is highly under control by various mechanisms such as histone modif...

Q: Fever increases the body temperature and can induce chills to help cool the temperature back down. W...

A: REGULATION OF BODY TEMPRATURE In warm blooded animals, various body mechanisms operate to regulate &...

Q: Many neurotoxins have been used extensively in physiological studies of neurons. When comparing tetr...

A: Neurotoxins adversely affects the structure and function of nervous tissue. There are more than 1000...

Q: The maintenance of a relatively stable internal environment is: a. metabolism b. evolution c. consta...

A: Organisms are classified on the basis of their ability to maintain a constant environment inside the...

Q: Compare and contrast the location and function of thecentral nervous system and the peripheral nervo...

A: In the PNS (peripheral nervous system), the bundles of axon or nerve fibers conducts information to a...

Q: The protein network that lines the- inner side of nuclear membrane is * .called

A: Eukaryotes are the organisms in which nucleus id developed and is surrounded by a membrane. Eukaryot...

Q: Explain why the events shown in part (a) inhibittranscription.

A:   According to the "central dogma, the genetic information transfer from “DNA to RNA” via transcrip...

Q: What are the major differences in the four phyla of fungi?

A: Fungi are the member of eukaryotic organism group which includes microorganisms like yeasts or molds...

Q: Compare the features of “Ardi” with those of “Lucy.”

A: The fossils belong to have been found for more than 6,000 individuals along with the rapid footstep ...

Q: Which type of contraction develops more muscle tension: isotonic or isometric?

A: Muscles are the tissues that can change their length and cause movement of the body parts.  

Q: Use of synthetic fertilizers often leads to the contamination of groundwater with nitrates. Nitrate ...

A: The amount of ammonia available influences the number of bacteria present (loosely). So, no, there i...

Q: What distinguishes lung capacities, as a group, from lung volumes?

A: Air which is present in the lungs is measured as lung volumes and lung capacities.

Q: What is a callus? How does it contribute to fracture repair?

A: Bone is a structure belongs to the skeletal system. It supports the muscle and holds the body in a s...

Q: Ms. Reczkiewicz has her thyroid gland removed to treat hyperthyroidism.Her condition is stable after...

A: Hypersecretion of thyroid hormone results in hyperthyroidism. It is an enlargement of thyroid gland ...

Q: Structure at end of arrow Structure B The name of the structure at the end of the arrow in structure...

A: Bacteria are microbes that exhibit different modes of reproduction. It includes bacterial conjugatio...

Q: After age 40, does total body water content increase or decrease?

A: Water is an important inorganic chemical molecule that forms the important constituent of the Earth’...

Q: List the adaptations that led to a land existence for plants.

A: Adaptation is the behavioral or physical characteristic of the plants that helps them to survive bet...

Q: Q1/ What is the relation between concentration gradient with Active & ?passive transport

A: Concentration gradient is defined as the difference in concentration of a particular substance acros...

Q: List the different levels of the taxonomic classification system.

A: Taxonomy stands for the naming and describing of organisms. These organisms include plants, animals,...

Q: How can behaviors be adaptive? Provide an example that includes support from the five tenants of evo...

A: Animals can be adaptive in behavior by getting used to all the new changes in the environment and co...

Q: Select the correct answer from the answers provided.The primary B-cell receptor is a. IgD c. IgE b. ...

A: A B-cell receptor is basically a protein present on the surface of B cells that binds with the antig...

Q: Topic: Preparation of Microbial Suspension  4. Inaccurate volume measurements of aliquots during dil...

A: Introduction  For accurate cell counting we need to keep in mind about the dilution factor. As durin...

Q: I need help

A: Cranial base – comprised of six bones: frontal, sphenoid, ethmoid, occipital, parietal, and temporal...

Q: Name the four major regions and two enlargements of the spinal cord?

A: The four regions of spinal cord are : Cervical region  Thoracic region lumbar region  Saccral regi...

Q: List Koch’s postulates, and discuss when they might not be appropriate in establishing causation.

A: Microbiology is the study of microbes. These microbes are prokaryotic organisms that cannot be perce...

Q: Explain how environmental factors can modify gene expression?

A: This is true that environmental factors can modify the gene expression, these environmental expressi...

Q: What features do the ophthalmoscope include?

A: The eye is an important organ in a human’s life. It is the responsible organ for the vision and the ...

Q: Can you please not type the answer can you write it on a paper

A: Answer 

Q: Identify three microscopic components of muscle cells notfound in other types of cells.

A: Myocytes or muscle cells are the cells that constitute muscle tissue. Muscle tissues are responsible...

Q: What is the role of tRNA in translation?

A: During translation the genetic information which is present in mRNA directs the order of specific am...

Q: Name a repressive histone modification (be specific)

A: Histones are defined as highly basic proteins that are found in eukaryotic cell nuclei that pack and...

Q: What is the sequence of bases for the start codon and what amino acid is made?

A: Proteins are the ultimate products of the genes. DNA is transcribed into m RNA and this is translate...

Q: Case-control study, prospective cohort study, cross-over trial, and retrospective cohort study are a...

A: Observational study designs are also called as epidemologic study defines are retrospective. They ar...

Q: Choose the best answer for below question. This organelle acts as a digestive organelle and may also...

A: Eukaryotic cell contains many subcellular structures known as organelles.Each organelles are specifi...

Q: Compare the vectors involved in sleeping sickness, Chagas disease, and leishmaniasis.

A: Human health is related to overall fitness of the body . This fitness of the body sometimes get alte...

Q: Briefly describe 5 examples of brain asymmetry (2 points each)

A: Human brain organisation and perception are distinguished by functional asymmetry between the two ce...

Q: How do activators facilitate transcription?

A: Transcription is a process of transcribing the template DNA into complementary mRNA sequence which i...

Q: Large muscle fibers that are multinucleated, striated, and voluntary are found in (a) cardiac muscle...

A: Skeletal muscle is voluntary and responds to conscious stimuli. The cells are striated and multinucl...

Q: Bacillariophyta (Diatoms) What are the morphology, ecology, and economic biology of this group, espe...

A: Answer. The morphology, ecology, and economic biology of the Bacillariophyta (Diatoms) are : Morphol...

Q: List the mechanisms that may cause allele and genotypefrequencies to significantly change from one g...

A: Evolution defines any “net directional change” or any “cumulative change” in the features of organis...

Q: Show how to Determining if an individual is homozygousdominant or heterozygous for two traits. ?

A: A gene is a unit of hereditary arranged in thousands on the double-stranded helical genetic material...

Q: A mushroom gains its energy by decomposing the tissues of dead organisms. Should mushrooms be classi...

A: A mushroom, also known as a toadstool, is a fungus' fleshy, spore-bearing fruiting body that grows a...

Q: What are transgenic organisms ?

A: Foreign/passenger DNA can be defined as the fragment of a DNA molecule that is enzymatically isolate...

Q: Indicate the root cause of each: an insufficient number of RBCs or a problem with hemoglobin product...

A: The condition in which an insufficient number of RBCs or a problem with hemoglobin production can be...

Q: -Complete the table by filling up the necessary details. -It's not incomplete. -Thank you in advance...

A: The process of respiration that involves the presence of oxygen is known as Aerobic respiration whil...

Q: Is this a successful streak plate? What mistake do you think was made in the image? Thank you.

A: Answer. No, this not a successful streak plate.  From the picture above it seems that you want to do...

Q: 2. Complete the following table, which compares microevolution with macroevolution. Microevolution M...

A: Evolution is a process in which the species are formed or something new is formed from the old exist...

Q: In Mammals, the Sex of an Offspring Is Determined by the Sex Chromosome in the Sperm

A: Mammals is a class in the animal kingdom which is characterized by its warm-bloodedness and females ...

Q: Where in the plant cell does photosynthesis take place ?

A: Answer-               In plants, photosynthesis takes place in chloroplasts, which contain the chlor...

Archaeal cell structure

Bacteria and archaea are two different prokaryotic domains that, along with eukarya, make up the three domains of life. Archaeal organisms can be found all over the biosphere. Many genera are extremophiles, meaning they thrive in extreme environments such as extremely high temperatures, high salinity, or pH extremes. Bacterial and archaeal cells are characterized by the absence of a nucleus and membrane-bound organelles.