What two properties define a stem cell? Distinguish between a totipotent stem cell, a pluripotent stem cell, and a precursor (progenitor) cell.

Q: Sexual reproduction is often described as an evolutionary paradox.

A:

Q: When can the regenerative capacity of the connective tissue clearly observed? And what specific conn...

A: Regenerative capacity of the connective tissue. 

Q: The concentration of calcium ions in the blood and tissue is quite stable because of a continuous in...

A: The flow of calcium to and from the bones is regulated by calcium homeostasis. It is the mechanism b...

Q: In cucumbers: warty (T) > smooth (t) dull (D) > glossy (d) warty, dull x smooth, glossy P: TTDD ttdd...

A: Recombination frequency {denoted as theta (θ)}, which is the frequency with which a single chromosom...

Q: Conduct research and summarize the causative agent and mode of transmission behind the multistate me...

A: The U.S. Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC) are...

Q: Mutations to SRP72 (the RNA component of the signal recognition particle) are known to cause some fo...

A: The proteins are synthesized by two types of ribosomes that are membrane bound ribosome and free rib...

Q: What adaptive advantage do synapses provide in nervoussystems (i.e., why isn’t the nervous system ju...

A:   In the nervous system of a human being, the term synapse is used for denoting a structure th...

Q: What is the functional significance of homoviscous adaptation with respect to the cell and to the or...

A: The adaptation of the cell membrane lipid composition to maintain proper membrane fluidity is known ...

Q: 1. (A) imparts pathogenicity (B) no sterols (C) with permease (D) 75% proteinacious 2. (A) thick pe...

A: all the other options are about the content of something.     2.D all other options are related to c...

Q: Like desert rodents such as the kang mammals such as dolphins have his that produce only a tiny amou...

A:

Q: Proto-oncogenes code for (a) morphogens (b) antibodies for immune responses (c) growth factor recept...

A: Cancer is the state of uncontrolled cell division.

Q: Please discuss the eukaryotic description process and mention all of its enzymes and components.

A: Given: Eukaryotic description Enzyme of eukaryotes Components of eukaryotes

Q: Which of the following statements about the epiginome is correct? 1. It is dynamic. 2. It is heritab...

A: Solution The epigenome is a collection of chemical molecules that alter or mark the genome in such a...

Q: Define biogeography and describe how the distribution of organisms supports evolution.

A: Evolution is the process of the accumulation of variations.

Q: Virology:What class of fusion protein does influenza have ?Name one characteristic of this class of ...

A: The molecular processes of virus membrane-fusion events are crucial to investigate because they serv...

Q: possible course of action to track if bats are the source of the SARS COV2? What are the limits to t...

A: Bats are an ancient and diverse group of ecologically important mammals, constituting almost a quart...

Q: 5. What are the structures shown in the microgra FIGURE 28.13? In which plant tissue(s) can these st...

A: Plants are active living organisms that undergo several metabolic processes. The most important meta...

Q: Define prezygotic barrier and postzygotic barrier and discuss its impact in the evolution of populat...

A: Reproductive isolation refers to a set of systems, behavioural, and physiological functions which pr...

Q: In a human somatic cell (normal body cell) that is in G2, what would be true about chromosome number...

A:   These cells would be considered diploid (2n).These cells would contain homologous chromosomes.Thes...

Q: Please discuss the common causes of kidney infections.

A: The infections caused in kidneys are called as kidney infections they are called as pyelonephritis. ...

Q: Which of the following is/are correct? a. Stained preparations of bacterial cells reveal much more d...

A: Gram staining is used to identify bacteria. It is used to find bacterial infection in the cell.

Q: 3. Nitrogen-fixing bacteria live throughout the ocean, from its sunlit upper waters to 200 meters (6...

A: Nitrogen fixing bacteria are microorganisms which are capable of transforming nitrogen gas from atmo...

Q: What is the current proposed chain of infection for SARS-CoV2

A: SARS-CoV2 stands for the Sever Acute Respiratory Syndrome Corona Virus 2. The spread of infection wi...

Q: 5. A parent cell has six chromosomes. Fill in the following table: # of Bivalents (Tetrads) # of Ind...

A: Mitosis: - occurs in all eukaryotes. - equational division (2n -> 2n)Meiosis: - occurs in sexuall...

Q: In Given dome Staternent Jbeow Statoment is worong Polyphenol oxidases 9 which with oregard to

A: This question is based on the function of polyphenol oxidase in plants.

Q: Distinguish among maternal effect genes, segmentation genes, and homeotic genes in Drosophila.

A: The pattern along the eventual head to tail (antero-posterior) axis of the flies Drosophila melanoga...

Q: Describe the series of events by which APC/C promotes the separation of sister chromatids at anaphas...

A: Anaphase promoting complex has a tendency to promote the transition of chromosomes that come from me...

Q: Not all mutations are bad. There are naturally occurring genetic mutations that can change the appea...

A:  crop breeding does: to improve yield, resist insects and disease, improve crop quality, shorten tim...

Q: What is endemism? Can you explain the ques

A: Geographic distribution refers to the natural dispersal of animals and plants in specific zones. Adv...

Q: Name Lewis structure 3-dimensional drawing n-Pentane (CsH12) 2. Chloroethene (CH,A) 3. Bromoethyne (...

A: Lewis structure is a method of representing the structure of a chemical compound by using a valence ...

Q: What is the first thing to do ,planning a prrogram a design or evaluating of health related fitness ...

A: The health related fitness level is highly required if you want to maintain a healthy living in your...

Q: The concentration of calcium ions in the blood and tissue is quite stable because of a continuous in...

A: There are  few important points about the bone tissue are as follows : We know that compact  bone t...

Q: What is the sister taxon of Taxon 3. The sister taxa or clade of Taxon 1? The sister taxon or clade ...

A: Solution    

Q: importance of adaptation as a mechanism for survival of a species.

A: Adaptation is an important factor that aids an organism to live properly in its surroundings . There...

Q: What have epigenetic monozygotic twin studies proven? A. Twins have identical epigenomes because the...

A: The term epigenetics means something that occurs due to a non-genetic influence on the expression of...

Q: Which of the following is a risk when using the common carotid as a primary injection site?     It...

A: The Common Carotid artery is a large elastic artery which provides the main blood supply to the head...

Q: Question: What are the major mechanisms maintaining reproductive isolation between populations?

A: Reproduction can serve two distinct purposes. The two distinct purposes of reproduction are producin...

Q: REVIEW: How many clades are in Tree A (or B or C...they're the same tree)? HINT: Count the internal ...

A: Cladogram is a diagramatical representation of relationship between ancestor and organism.

Q: If you are asked to synthesize a cell using only five parts, what parts will you include to ensure t...

A: The cells are the smallest structure and functional unit of the organism that perform specific funct...

Q: The Na+-glucose transporters SGLT2 and SGLT1 are located at different levels of the kidney proximal ...

A: Introduction :- Kidney is the main organ of excretion and osmoregulation in vertebrates through whic...

Q: Using a particular family as a model, how do you distinguish nuclear from extrachromosomal inheritan...

A: Distinguish nuclear inheritance from extrachromosomal inheritance. 

Q: Evolution is the accumulation of genetic changes within _______________ over time. (a) individuals (...

A: The biological change of a species over time is referred to as evolution. Evolution helps organisms ...

Q: How would a cell be affected if the cell membrane did not have any membrane proteins and what functi...

A: Introduction In this question we will discuss how would a cell be affected if the cell membrane did ...

Q: What is Nitrogen cycle and explain how it works?

A: Since you have asked multiple questions , we will solve the first question for you. If you want any ...

Q: Why are only inherited variations important in the evolutionary process? Explain your answer.

A: Evolution is a process that causes changes in a population's genetic material through time. Evolutio...

Q: 3. When you dig up a plant to move it from one spot to another, the plant is more likely to survive ...

A: The wet soil, delicate web of root hairs, symbiotic fungus, and soil microbial populations that work...

Q: Which one of these cell types lacks a cell nucleus and therefore have no DNA? A) Glia cells B) Red b...

A:

Q: Salim and Sara are contemplating having children, but Salim’s brother has galactosemia and Sara has ...

A: Galactosemia is an autosomal recessive condition. Because of a missing or mutated enzyme, the affect...

Q: Which of the following are antibiotics? X-gal and IPTG haemolysin Escherichia coli pBluescript ...

A: Antibiotics are specific molecules that are released by some bacteria. Actually it is used as the de...

Q: C E (a)

A: The given diagram above is the cross section of a bone showing its anatomy. The various parts of thi...