Q: Do all eukaryotic cells have nucleus and only one nucleus?
A: Introduction - Eukaryotes are organisms with a nucleus encased within a nuclear envelope in their…
Q: Q.4. What are the characteristics of wind, water and insect-pollinated flowers?
A: wind-pollinated flowers have the following characteristics: these flowers are not particularly…
Q: Which event during meiosis does NOT lead to genetic diversity in the gamete cells?
A: Sister chromatid replication is the process where the chromosome doubles it chromosomal content…
Q: Which of the following is not part of Koch’s Postulates? a. A specific microorganism must be…
A: The ability of the microorganisms to causing disease is demonstrated by Robert Koch. It is developed…
Q: What is the difference between the conservative and semiconservative replication?
A: DNA stands for deoxyribonucleic acid. DNA replication is the process in which the exact copy of DNA…
Q: Explain what evolutionary tree is. Also explain why it is important.
A: Introduction Evolutionary biology:- Evolutionary biology is a subdiscipline of the biological…
Q: 4. The nursing instructor is discussing with her class about the male reproductive system. A student…
A: Menstruation commonly called period, is the normal vaginal bleeding that occurs as part of a woman's…
Q: Which of the following statements is true?
A: The products of photosynthesis are glucose and oxygen. The products of cellular respiration are…
Q: An organism has a diploid number of 20 in a primary oocyte. a. How many tetrads are present in the…
A: Oogenesis is a kind of gametogenesis. It produces four haploid gametes (egg) from single parent…
Q: Chthamalus are stronger than Balanus Dessication prevets Chthamalus from growing beyound upper…
A: Niche overlap describes the situation in which co-occurring species share parts of their niche space…
Q: What slide preparation technique should you use to determine the chromosome number of a newly…
A: Microtechniques are set of approaches used in preparation of micro-objects for research. Two…
Q: You are studying a protein that contains the peptide sequence RDGSWKLVI. The part of the DNA…
A: The restriction endonuclease are responsible for cutting the DNA at specific sequence and they…
Q: c) Illustrate the mechanism of action o Aýsozyme.
A: Answer Machanism of action of lisozyme:
Q: What is autophagic intracellular digestion? Why is this type of intracellular digestion intensified…
A: Introduction :- Intracellular digestion is the process of breaking down complex foods into simpler…
Q: Which of the following part of human skeleton forms the helmet for the protection of human brain? a)…
A: Introduction The brain is a complicated organ that regulates every action in our body, including…
Q: Why is it important to conserve full range of deadwood?
A: Deadwood - It is a forest where dead standing trees and dead lying trees are found. Although, dead…
Q: Communications between cells is facilitated by the presence of
A: There are many cells in our body. Each cell needs to communicate with the other. This means the…
Q: Q.1. Explain the role of pituitary gonadotropins during the follicular and ovulatory phases of the…
A: Introduction In this question we will explain the role of pituitary gonadotropins during the…
Q: A pea plant called R1 with yellow (G, dominant) and smoothed (W , dominant) seeds is test crossed…
A: A trait is a characteristic features that is unique for particular individual . In this question ,…
Q: Simpson’s Diversity Index results in a number between 0 and 1. To get a feel for how this equation…
A: Simpson's Diversity Index is a measure of diversity which takes into account the number of species…
Q: In Figure 17-19, is there any difference between the inversion products formed from breakage and…
A: GENETIC LINKAGE: When DNA sequences are found on the same chromosomes in the same location, this is…
Q: 1. Some survivors of disastrous events have post-traumatic stress disorder (PTSD). Symptoms include…
A: PTSD or post traumatic stress disorder lead to physical changes in the brain parts. Significant…
Q: Outline salient features of carbon cycling in an ecosystem
A: Introduction In this question we will discuss about the salient features of carbon cycling in an…
Q: Explain what are eukaryotes
A: The cell (as from Latin term 'cellula,' which means "little room") is life's most fundamental…
Q: MULTIPLE CHOICE Which of these is not found in a cell that can grow? A. nucleus B. cellulose C.…
A: Cell wall A non living rigid structure called the cell wall forms an outer covering for the plasma…
Q: A diploid somatic ("body") cell has 2n=20 chromosomes. At the end of mitosis, each daughter cell…
A: * mitosis is a process in which chromosomes are separated into two new cells that gives rise to…
Q: Which of the following did not contribute to Earth's present atmospheric concentrations of oxygen…
A: *Atmosphere is a layer of gases which is held by gravity of the planet body. *planet retains…
Q: 1. The frog Hyla chrysoscelis (2n) Tetraploid 2. The yeast Schizosaccharomyces pombe (1n) Diploid 3.…
A: Tetraploid - ans. 3 Diploid - ans. 1
Q: The comparison of genetic material from individuals of regional populations of humans, used to help…
A: The term anthropology can be split into two greek words, “Anthropo” is defined as human beings and…
Q: 11. 1st The endocrine system consists of glands that secrete chemicals called hormones to control…
A: According to guidelines, first three questions have been answered. Kindly post the remaining…
Q: In plant reproduction, fertilization occurs when the male and female sex cells form ______________.…
A: The fertilization is the process of fusion of male and female gamete.
Q: Given the table below, give the difference between the genetic composition of offspring in asexual…
A: There are mainly two types of reproduction: Sexual: fusion of gametes. Asexual: mitosis
Q: What is Menopause?
A: Introduction In this question we will discuss about the Menopause.
Q: Please help me identify which of the following apply to the specimin I have attached in the images.…
A: The human skeleton has 206 bones, omitting teeth and sesamoid bones. There are 126 appendicular…
Q: In Gram-positive bacteria, peptidoglycan cross-link is formed by a peptide bond from the amino group…
A: In gram positive bacteria Peptidoglycan carries covalently attached cell surface components like…
Q: Which uses of animals, if any, are morally permissible, and which are morally wrong?
A: Some animals are friendly and don't harm us while some are wild and don't like to interact with…
Q: How do ecologists estimate the total number of species present in the world?
A: Introduction A species is often defined as a group of animals, plants, or other living things that…
Q: Which blood vessel contains blood with the lowest concentration of carbon dioxide? Select one: O a.…
A: The heart is a four-chambered, hollow organ and it is divided into the left and right sides by the…
Q: The sequence of mRNA made using the DNA double helix shown below is (Select ] The sequence of…
A: Introduction Protein synthesis is a two step process. In the first step, a molecule of mRNA is…
Q: Current examples of edible vaccines treat the following Polio Measles Нерpatitis C None of the above
A: Edible vaccines are made from transgenic plants and animals or contain chemicals that cause an…
Q: True or False.
A: A membrane protein that is stably connected to the cell membranes is known as an integral membrane…
Q: Below is the sequence of MRNA. 1. if U is mutated to C, then it will lead to a [ Select ) mutation.…
A: Answer :- 1. UGU (Cys) is converted to UGC (Cys) - silent mutation
Q: In a healthy untreated cell, the ER membrane network is spread out like a net throughout the…
A: *The cytoskeleton is a complex and dynamic network of protein filaments present in the cytoplasm of…
Q: Molecule Name (or short form name) of Order the molecule is in during Glycolysis compared to other…
A: The name of the molecule is Pyruvate Pyruvate is the last molecule which is formed when glucose is…
Q: Which of the following is not true about glycolysis? a. Glucose is the starting substrate b. Also…
A: Glycolysis is a series of reaction in which glucose molecules split into two three carbon molecule…
Q: You are attempting to prepare a single gene knockout library using the pRL27 transposon system. You…
A: * Given that prepared a single gene knockout library using the pRL27 transposon system. *Then grows…
Q: 1) Explain why the intersex condition supports the idea that sex and gender are non-binary and that…
A: Sex is usually categorized as female or male but there is variation in the biological attributes…
Q: What are the characteristic features of Euglenoids?
A: The following are some of the distinctive characteristics of Euglenoids.
Q: How is a key helpful in the identification and classification of an organism?
A: Key It is defined as a taxonomical aid that helps in process of identification and classification…
Q: What are the major causes of species losses in a geographical region?
A: INTRODUCTION Allopatric species are those that live in various geographical locations. It's a type…
Which of the following statement/s is/are true about gram negative bacteria
Step by step
Solved in 2 steps
- Which of the following statement/s is/are true about gram positive bacteria Cell wall has thick peptidoglycan layer Cell wall lipid content is very low Lipopolyscharride layer is absent All of the aboveWhich statement about the cellular arrangments of bacteria is NOT correct? Spiral bacteria are typically single. A diplobacillus arrangement consists of two cocci adhering to one another. A chain of bacilli is called a streptobacillus arrangement. A cube-shaped arrangement of cocci is a sarcina. A square-shaped arrangement of cocci is a tetrad.Which of these structures is most resistant to chemical disinfection? (Which is hardest to kill?) fungal spores chlamydia bacteria protozoa cells bacterial spores
- Bacteria in the phylum Firmicutes are distinguished from the phylum Actinobacteria on the basis of their spiral shapes. the presence of LPS in their membranes. their Gram stain reaction. the low G + C content of their DNA. the high G + C content of their DNA.A microbiologist is working with a pure strain of bacteria isolated from a mixed sample. Which of the following would indicate that the bacterium is NOT Helicobacter pylori? Cells have flagella when viewed by flagellar staining. Secretes acids produced from metabolism of sucrose. Cells are curved rods. Produces and secretes urease enzyme. Cells stain Gram negative.Gram-negative bacteria are not killed by penicillin because they: do not have ribosomes. have an outer membrane layer covering their peptidoglycan cell wall. have two layers of peptidoglycan. do not have peptidoglycan. their ribosomes are protected with their own outer membrane layer.
- A microbiologist identifies a bacterium that is capable of degrading cellulose, lignin, chitin, latex, aromatic chemicals, and keratin. It produces metabolic byproducts that give soil a musty smell as well as some that can be used as antibiotics. Which of the following genera is being described? View Available Hint(s) for Part A Pseudomonas Campylobacter Neisseria StreptomycesWhich of the following is present in both gram-positive and gramnegativecell walls?a. an outer membrane. c. teichoic acidb. peptidoglycan d.lipopolysaccharidesMicrobiologists use the Gram stain to differentiate among two groups of bacteria. How do Gram-positive and Gram-negative bacteria differ? Question 1 options: the presence or absence of peptidoglycan in the cell wall the presence or absence of muramic acid in the cell wall the presence or absence of outer plasma membrane the lipid composition of plasma membrane none of the above.
- If a scientist were trying to separate Klebsiella, Proteus, Shigella, and Vibrio into two separate categories, with two genera in each category, what is a characteristic they could use? Morphology Gram-reaction Oxygen requirement Motility ArrangementWhich of the following is NOT a characteristic for bacteria in general? Plasma membrane has no saccharide units Sterols is one of its major outer membrane component Genome present in the nucleiod region of the cytosol Granules are mostly polysaccharide in natureDescribe the cross - section side view of a Gram - negative cell . Clearly state where the following would be located or write the letters in order of appearance from the outside to the inside . If any of these structures are not present , make sure to leave them out . A ) peptidoglycan ; ( B ) periplasm ; ( C ) porin ; ( D ) LPS ; ( E ) teichoic acids ; ( F ) plasma membrane : ( G ) outer membrane : ( H ) nucleoid