The astronomer Carl Sagan once said, “We are made ofstar stuff.” Explain why this is true of all life on Earth.

Q: A. Directions: Write the cause of the change. Write your answers on a separate sheet of paper. Evolu...

A: Evolution is change in the inherited characters of biological population over many successive genera...

Q: Cholesterol in the membranes fit between saturated (single bonded) lipids so they don't get too stic...

A: cholesterol interact with membrane ; Cholesterol moves through the body in different lipoprotein com...

Q: 9. Multiple mechanisms regulate gene expression in eukaryotes. What are the mechanisms that control ...

A: Regulatory mechanisms of eukaryotic gene expression. 

Q: What is the type of genetic inheritance of color blindness? Is color blindness more frequent in men ...

A: Colour blindness is a condition in which a person is incapable to see colours normally. Colour blind...

Q: You are trying to clone a gene. You have successfully isolated it from the genomic DNA of an organis...

A: Gene cloning is a process to form multiple copies of desired DNA of interest.  This is done to- * to...

Q: List three ways in which oogenesis differs from spermatogenesis. Be specific! OOGENESIS SPERMATOGENE...

A: DISCLAIMER : Since you have asked multiple question, we will solve the first question for you. If yo...

Q: What is meant by Alpha Orbital and Beta Orbital?

A: Orbital It is defined as as wave function that shows the traits of no more than 2 electrons present ...

Q: Complete the table below by giving the hormones secreted by the organs of Endocrine System OR...

A: The endocrine system is a communication system that regulates distant parts of the body organs throu...

Q: The following are photomicrographs of T. spathacea leaf cells in 0.01 M NaCl and 0.30 M NaCl solutio...

A:

Q: Which of these is caused by the effects of auxin? (choose all that apply) 1.Maintaining apical domin...

A: Answer :- As we know that Auxins are powerfull development harmone created by plant normally. They a...

Q: What is an endemic disease?   A disease of which there are only a few scattered cases in a populatio...

A: Few disease only occurring in a particular area or may be it affect a large population. Usually this...

Q: Molecule Structure Function Carbohydrates Polymers of glucose rings Proteins Polymers of amino acids...

A: These are different biomolecules which are required for the proper functioning of the body.

Q: Identify the sites of lagging strand synthesis. Select all that are true. 5 O a. A O b. C O c. B O d...

A: Introduction:- The process of replicating a double-stranded DNA molecule into two identical DNA mole...

Q: Explain the several key properties of DNA vectors ?

A: Microbiology is the scientific study of single celled, multicellular, and acellular microorganisms. ...

Q: What are cloning vectors ?

A: Cloning is the process of making identical copies of a DNA sequence.

Q: Calculate the AG° for the following summary equations by showing the individual reactions and their ...

A:

Q: From the list of strategies for dealing with harsh cold environments, choose those that an ectotherm...

A: Ectotherm, any cold-blooded animal—that is, any animal whose body temperature control is dependent o...

Q: where and how would hyaluronidase most likely act to break down HA?

A: The enzyme hyaluronidase, which breaks down hyaluronic acid, has long been utilised to improve drug ...

Q: Which of the following is the most effective way to reduce the number of nosocomial infections? View...

A: An infection is the invasion of body tissues by disease-causing agents, their multiplication. The ho...

Q: Describe one possible problem that may occur if this organism grows in the presence of oxygen

A: Phosphoglycolate salvage pathways remain uncharacterized in chemolithoautotrophs using the Calvin cy...

Q: Environmental factors can influence the survival rate of the organism in a population. Name at least...

A: Survival rate of individual in a population is the percentage of people who are alive and are fit en...

Q: How do genetic drift and geneflow cause evolution? Give an examples.

A: Over repeated generations, evolution is explained by variation in the heritable traits of natural po...

Q: Why may some bacteria use extracellular enzymes to form blood clots? View Available Hint(s) for Part...

A: Option B. Blood clot can hide bacteria from the immune system 

Q: what practical importance are air-borne microorganisms to the laboratory workers?  What precautions...

A: Air is the carrier of many microbes. These microbes that are suspended in air particles are called b...

Q: You wish to amplify gene Y alone from the double-stranded DNA shown in the figure below. Identify th...

A: Primer binding sites for the amplification of gene "Y" only. 

Q: Bacterial capsules work by _____. View Available Hint(s) for Part E       protecting the bacterium f...

A: So correct option will be protecting the bacterium from engulfment Capsules made of substances occur...

Q: . The human insulin gene is transcribed, translated and then placed in the bacterial cytoplasm.

A: Human insulin is the name which describes synthetic insulin which is laboratory grown to mimic the i...

Q: How do protozoa digest?

A: Protozoa digest their food through intracellular digestion, which means that organic material is abs...

Q: Section two. Match horizontal gene transfer mechanism with best definition. Answers are used more th...

A: Horizontal gene transfer is the transfer of genetic material between two organisms via non-sexual la...

Q: explain the benefits, effects, and contributions of the five agents of evolutionary change

A: These are 1- mutation.  2- non-random mating. 3- gene flow.  4- genetic drift . 5-natural selection.

Q: What can the world do to stop deforestation? (5 bull-point)

A: Introduction : Deforestation means Cutting down and clearing trees to use the land for other purpose...

Q: what is the standard set by by FDA/FAO of using the squash in food?, describes its quality

A: FDA stands for Food and Drugs Administration. FAO stands for Food and Agriculture Organization.  Bot...

Q: One of cryosurgery disadvantage the volume of tissue destroyed can be controlled * O True O False

A: Cryosurgery is the tissue technique by using freezing technique. 

Q: isolated in pure culture?

A: Helminths cannot be isolated in pure culture 

Q: A. Punnett Square B. Genotype of father C. Genotype of Mother D. What percent of the offspring will ...

A:

Q: In a bird, codominance is seen in feather color. If a red bird is mated with red and white, what is ...

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

Q: Define what it means to be conscious.

A: Conscious is a Latin term that means "to know" or "to be aware." As a result, a conscious individual...

Q: What is the difference between conventional optical microscopes and inverted microscopes?

A: Introduction Conventional optical microscopes:- This type of microscope uses visible light (400-700 ...

Q: How do the Arp2/3 complex and NPFs nucleate the assembly of actin filaments?

A: Introduction:- Actin filaments (F-actin) are linear polymers of globular actin (G-actin) subunits th...

Q: A cell picks up mutations that allow it to move past the G1 and G2 checkpoints even if its growth fa...

A: Answer: 

Q: How did maize become a widespread crop globally?

A: Scientists have proposed two major ideas for the emergence of maize. According to the teosinte parad...

Q: What biochemical reaction is catalyzed by γ-secretase? Why was it proposed that a chemical inhibitor...

A: Enzymes are proteins with catalytic power.

Q: Name: Chal car. Directions: For each question below, select the best answer and nl in the a on the a...

A: 1. Gregor Mendel studied the different traits present in a pea plant using mathematical analysis of ...

Q: This diagram shows a parental cell going through meiosis and producing 4 daughter cells. Which celu ...

A: The indirect process of cell division in which chromosomes of parent sales divide ones but nucleus d...

Q: Would there be any difference between a young and mature monocot stem cross section?

A: Angiosperms or flowering plants can be divided into two categories. One of the categories involves m...

Q: Distinguish among inducible, repressible, and constitutive genes.

A: A gene is a fundamental unit of heredity in biology, consisting of a sequence of nucleotides in DNA ...

Q: What is the difference between memory T cells and cytotoxic T cells?   Memory T cells need more regu...

A: The answer is Memory T cells do not need to interact with antigen-presenting cells to become activat...

Q: genotypes of the individuals in the chart. child who is blue-eyed. Blue eyes are mostly recessive. M...

A: The pedigree along with genotypes are attached below

Q: . In the PCR process, if we assume that each cycle takes5 minutes, how manyfold amplification would ...

A: Introduction: PCR(Polymerase Chain rlReaction) is a technique used to amplify a single copy or a few...

Q: White fruit color in summer squash is dependent on a dominant gene (W) and colored fruit to the rece...

A: Epistatic gene refers to a gene that suppresses the expression of another gene.

Pre-Darwinian Concepts