Identify the function of the Purkinje fibres. Select one: O a. O b. O c. O d. act as a pacemaker and initiate the heartbeat conduct impulses from the AV node to ventricles prevent the valves from inverting during heart contraction cause atrial contraction

Q: Which of the following statements are true about double-stranded DNA? Write TRUE or FALSE 1. A+G=C+T…

A: DNA is a double stranded molecule with complementary base pairing. Complementary base pairing occurs…

Q: Which of the following is not true of the lymphatic system? a. Oxygen is transported to body tissues…

A: Introduction The spleen, thymus, lymph, lymph nodes, and lymph vessels make up the lymphatic system.…

Q: scuss all the importance of epithelium found in the digestive tract.

A: The digestive system is a collection of organs that aid in the digestion of food materials and the…

Q: If ox ale acctate, the molecule that starts with Acetyl- CoA in the citric at id cych, is not a…

A: Oxaloacetate and its effect on cellular respiration.

Q: A fish die-off occurs in a pond near an agricultural field where fertilizer high in N and P has been…

A: Fertilizers are natural or synthetic substances, that are used in agricultural fields to increase…

Q: Imagine you are a scientist observing rats in the wild. As the rats reproduce, rats born with white…

A: ANSWER:- One clarification is that white fur is a dominant trait, whereas black fur is recessive.AS…

Q: Name the airways in the mammalian lung. What are their functions? How does air enter and leave the…

A: In mammal the respiratory system exchanges gases with the surroundings. Once air enters through the…

Q: First letter U U UUU UCU UAU UGU UUC UCC Tyr Cys UAC UGC UUA UCA UAA STOP UUG UCG UAG STOP UGA STOP…

A: Introduction Gene expression is the process through which information from a gene is used to create…

Q: All of the fossil remains of the early hominins and australopithecines are found on the continent of…

A: Introduction Human evolution:- It is the process by which human beings developed on Earth from…

Q: To determine: Whether ribosomal RNA genes were "born" perfect.

A: Ribosomes are complicated organelles that play a role in protein synthesis in all living cells. They…

Q: 18. During cell signaling, tissue X sends a signal to tissue Y, tissue Y responds but then sends the…

A: Cell signaling can be categorized into four types based on the distance that the signal travels to…

Q: Which of the following diseases is caused by a pathogen that is NOT a living organism? O A. Guinea…

A: A pathogen is an infectious agent that causes a disease. In general, there are five main types of…

Q: In onions, male sterility is due to the interaction of a chromosomal allele pair hh and "sterile"…

A: Cytoplasmic inheritance is a phenomenon that occurs when DNA from the parents' cytoplasmic…

Q: Which of the following is NOT a bone of the appendicular skeleton? O the scapula O a rib a…

A: According to the question, we have to find out which of the following is Not a bone of the…

Q: Modified True or False. Choose only the letter of the correct answer. 1. Transmission of mtDNA…

A: Introduction A mutation is a change in an organism's DNA sequence. Mutations can be caused by…

Q: The arrangement of muscles so that the action of one muscle is opposite to that of its partner is: O…

A: Please follow step 2 for detailed explanation.

Q: 11. A lecture hall of 1000 students conducts the same allele frequency simulation that we conducted…

A: Allele frequency:  The allele frequency is a measure of genetic variation. It generally shows us…

Q: 1. In the pedigree below, Use "A" for the allele associated with the dominant phenotype, and…

A: A pedigree chart shows the inheritance pattern of a particular trait. Each row contains the…

Q: What is the importance of feedback systems in the control of hormonal output in mammals? Offer two…

A: A feedback mechanism is a loop in which a product feeds back to control its own production.

Q: Differentiate histologically the scalp skin and the palm skin. Include all the histological…

A: Skin is the largest and heaviest organ of the body. It consists of three main layers; the epidermis,…

Q: How Alamanda Cathartica helps to prevent the lice on hair?

A: Alamanda Cathartica It is also called golden trumpet. It is a flowering plant which produce…

Q: Differentiate histologically the scalp skin and the palm skin. Include all the histological…

A: Skin It is the largest organ present in the body of a human. It covers from head to toe and consists…

Q: Which of the following is NOT a part of the axial skeleton? scapula sacrum O ribs O cranial bones

A: The skeletal system is responsible for providing the framework to the body. It is made up of bones.

Q: The digestive tract and the gut microbiome have a mutualistic relationship. What does this mean? O…

A: Mutualism is a type of symbiotic relationship where all species involved benefit from their…

Q: Please answer asap and type your answer and do not copy from anywhere please In a study published in…

A: A keystone predator is one which "prevents a particular herbivorous species from eliminating…

Q: First letter U C A U G Second letter UUU UCU Phe UGU UUC Cys UCC UGC UUA UCA UAA STOP UGA STOPA UUG…

A: Mutation is defined as any change in the sequence of a DNA, chromosome structure or the number of…

Q: Kim works as a dog trainer. She wants to apply the methods of science inquiry to improve her…

A: Introduction Injury is defined as the physical harm that occurs when the human body is exposed to…

Q: To define: The term allosteric enzyme and allosteric effector.

A: Introduction :- Enzymes are proteins that enable our bodies' metabolism, or chemical reactions, go…

Q: Now consider the illustration above that shows data on how often white fronted bee eater birds will…

A: Hamilton's rule The rule states that altruism is observed between organisms that are closely…

Q: Within the subphylum Urochordata is a group called the appendicularians (or larvaceans; class…

A: The function of the body's distinct components and systems is referred to as physiology. It is…

Q: The circulation and the homeostasis of the cellular environment:  Describe (in the correct order)…

A: Introduction Homeostasis, which is described as a self-regulating mechanism through which an…

Q: A stickleback fossil may show no signs of pelvic structures. What are possible sources of error…

A: Introduction A study of stickleback fish reveals evolutionary secrets. Whales, snakes, some lizards,…

Q: Describe the significance of oxygen in the last phase of aerobic respiration using specific examples

A: In This question we have to describe about role of  oxygen  in aerobic respiration and aerobic…

Q: Which mechanism is most likely used by these cells to transport ions against their concentration…

A: Q . Which mechanism is most likely used by these cells to transport ions against their concentration…

Q: Skeletal muscle contraction requires: O calcium ions O ATP O arrival of a nerve impulse all the…

A: Skeletal muscle is composed of muscle fibres which have smaller units called myofibrils. There are…

Q: Which of the following is least likely to produce genetic variation in the offspring of an…

A: Genetic variation is the changes in the genes of offspring from the parents. Meiotic cell division…

Q: Which muscles types are under voluntary control: Skeletal O Smooth O Cardiac O All the above

A: Introduction:- Cardiac, smooth, and skeletal muscle tissue are the three forms of muscle tissue.…

Q: what is the placentation type (axils, basal, parietal, free-central, or marginal) of avocado?

A: Placentation are of majorly 5 types - basal, axial, free central, parietal, marginal.    In basal…

Q: Sample A: Sample B: Sample C: Sample D: Sample E: Sample F: 22mm 18mm 35mm 30mm 28mm 28mm 21mm 17mm…

A: Introduction The zone of inhibition is the area around an antibiotic pot where bacteria cannot grow.…

Q: Which antibiotic would you want to take based on the results found in the table? I would take…

A: Zone Of Inhibition: A Zone of Inhibition Test, commonly known as a Kirby-Bauer Test, is a…

Q: A group of snakes were all placed into environments that had differing selective pressures. Read the…

A: Natural selection of a particular trait can take place in 3 ways; they are Directional selection :…

Q: Briefly describe a generalized plant embryogenesis.

A: Plants are eukaryotic, multicellular organisms belonging to the kingdom Plantae and are capable of…

Q: Your body releases Anti Diuretic Hormone (ADH) from the pituitary gland when O When you're hungry…

A: Introduction Hormones are chemical substances that function in the body as messenger molecules. They…

Q: 11. What is a typical characteristic of an r-selected species? a. boom-and-bust popuation growth…

A: The r/K selection hypothesis in ecology refers to the selection of features in an organism that…

Q: What proportion of your diet would you estimate consists of meat, milk, eggs, or other animal…

A: Introduction The biochemical and physiological process by which an organism uses food to sustain its…

Q: What role do feedback mechanisms play in the regulation of hormone production in mammals? Give two…

A: Regulation of hormone production The control of the production of hormones is vital for the process…

Q: SUBJECT: GENETICS HUMAN SEX CHROMOSOME Distinguish male from female human beings. (Based on sex…

A: Sexual reproduction refers to the form of reproduction that occurs through the union of male and…

Q: Why is maintaining a high body temperature (e.g. 37°C) more challenging for smaller endothermic…

A: Endothermic animals These are defined as the animals that have the capability to sustain a constant…

Q: DNA polymerase III can correct replication errors through its ________ activity. a. 3’ to 5’…

A: Introduction: Although DNA replication is a highly precise process, errors such as a DNA polymerase…

Q: Which muscle cells would you use more of, if you train to run a marathon? O Slow twitch cells O Fast…

A: There are three types of muscle -  A. Skeletal muscle - Voluntary and striated. B. Smooth muscle -…