Both cartilaginous and bony fishes have_ a. jaws d. a swim bladder b. a bony skeleton e. a four-chambered heart c. lungs f. all of the above

Q: Older adults must consume more calories to stay healthy? A. True B. False

A: It is a false statement that older people need more calories to stay healthy. Although there is no…

Q: Which chordates exhibit internal fertilization? 2. Which chordates exhibit external fertilization?

A: External fertilization: it is a mode of reproduction where a male organism's sperm fertilizes a…

Q: How can countries in the Caribbean produce wine

A: Making wines from tropical fruit involves the same factors as making wine from fruit that is native…

Q: Why is pH important for the buffer?   The pH is important to the stability of the gel.     The pH…

A: @ Why is pH important for the buffer?  Answer - pH is important for buffer for processes and/or…

Q: Give the process of internal fertilization in turtle. Show illustration how the fertilization…

A: Turtles are a type of reptile known as Testudines. They are distinguished by a shell made primarily…

Q: 13.Which of the following statements is TRUE about corpus luteum?(This is a multiple choice question…

A: Answer--

Q: Dual innervation of viscera means: O Visceral organs receive both autonomic and somatic nerve fibers…

A: Dual innervation means innervation from both Sympathetic and Parasympathetic Nervous Systems. Most…

Q: The posterior pituitary stores and secretes: PTH and calcineurin O Insulin and glucagon O Adrenalin…

A: Hormones are the chemical messengers of the body. Hormonal secretions from various glands control…

Q: Refrigerating or freezing foods will kill most or all bacteria present in the food? A. True B.…

A: Introduction :- Bacteria are single-celled organisms that are small in size. Bacteria can be found…

Q: The two primary types of toxins associated with foodborne illness affect the ? A. Nervous system…

A: Introduction :- The gastrointestinal tract is the digestive tract or passageway that connects the…

Q: Which of the following does NOT contribute to the longer lasting and more widespread effects…

A: Sympathetic System:  Along with the parasympathetic nervous system, the sympathetic nervous system…

Q: How does capillary electrophoresis differ from gel electrophoresis?   a) The capillary system can…

A: Gel electrophoresis is done in a vertical or horizontal plane with a polymeric matrix of…

Q: Briefly describe the effector functions of the following subsets of CD4* helper T lymphocytes and…

A: Helper T cells are arguably the most important cells in adaptive immunity, as they are required for…

Q: Fadi was diagnosed of having chronic stress due the bad economic and political situations in…

A: The common cold is caused by viral infection. People under severe stress are more likely to catch a…

Q: During the first 3 seconds of a sprint, an athlete does not burn any carbohydrates? A. True B.…

A: Sprinting is defined as sprinting a short distance at maximum speed in a short amount of time. It's…

Q: The following factors differentiate the two forms of relapsing fever EXCEPT A. Type of vector B.…

A: There are few important points : Any organism that causes a disease is pathogen and its ability to…

Q: earth'sis composed primarily of iron and nickel.

A: Our planet Earth is divided into four layers, these areas; inner core  outer core mantle thin-crust…

Q: Which one of the following terms best describes a phospholipid. It consists of а: A. polar head and…

A: All plasma membranes contain proteins as well as lipids and the basic structure of the plasma…

Q: please answer all give the significance/role/effect of the reagent/condition in the isolation or…

A: Electrophoresis It is defined as a technique through which biomolecules such as DNA, RNA, or protein…

Q: Directions: Answer the questions. Cite your sources to support your given answers. 1. Are pigeons…

A: There are certain similarities in the birds and reptiles which are discussed below. On the basis of…

Q: In case of lactation which of the following should be present: Prolactin оxytocin Baby suckling All…

A: Introduction :- Lactation is the process by which human milk is produced. Human milk is produced by…

Q: What prevents the immune system from responding to and destroying tumour cells in d) malignant…

A: Answer ::   The answer should be written in a stuctured manner with different headings like…

Q: Are other life chemistries possiblebesides the single one known on Earth(and described in this…

A: Carbon is referred to as an important backbone of every biological molecule that is known today.…

Q: NDICATE WHETHER THE STATEMENT IS TRUE OR FALSE 1. Pelle is an inhibitory protein.   2. Tube is an…

A: Pelle It is a protein that is a serine or threonine kinase that has the ability to phosphorylate the…

Q: Which of the following is NOT a recommended method for preventing cross-contamination? A. Washing…

A: Cross contamination  Cross contamination is physical transfer or movement of pathogens from one…

Q: What are the processes of the photochemical stage of the photosynthesis process?

A: Introduction :- Plants take in carbon dioxide (CO2) and water (H2O) from the air and soil during…

Q: 27 The low pH of the stomach enhances chemical absorption, particularly nutrient absorption True…

A: 28. Most medications from the blood cannot enter the brain because of the blood–brain barrier (BBB).…

Q: The FITT principle is? A. The principle that a good physical fitness program should be based on…

A: Exercise is a significant aspect of determining an individual's health. Lack of physical activity…

Q: THE FACTOR THAT DOES NOT AFFECT THE MICROCLIMATE 1. Illumination 2. air temperature 3. air humidity…

A: Microclimate means the climate of a small specific place within an area as compared to climate of…

Q: indicate if TRUE or FALSE 1. Torpedo protein is a membrane receptor 2. Binding of Gurken signals…

A: 1) Torpedo maculopathy is a circumscribed, congenital lesion of the RPE and outer retina so it's…

Q: Which of the following is a Phase II reaction? A Dehalogenation B Reduction c) Oxidation Glutathione…

A: ANSWER;-D) Glutathione conjugation. Explain;- Phase II reactions consist of adding hydrophilic…

Q: Find the flaws! Biodiversity occurs in patterns across the globe. Generally speaking, biodiversity…

A: Biodiversity refers to all the different types of life present in an area. It is the biological…

Q: The discharge rate of an off-center ganglion cell: O is not an absolute measure of light intensity…

A: Ganglion cells are the major output cells of the retina. Their axons gather at the optic disk, where…

Q: Some traits that can be counted and expressed in whole numbers, such as bristle number in…

A: Introduction Traits are features or attributes of an organism that are influenced by the environment…

Q: uestion 6 hich conditions would NOT lead to good preservation of a dead hominin skeleton? Dying in a…

A: Erect posture, bipedal mobility, larger brains, and behavioural features like as specialised…

Q: key function of rod photoreceptors is to: detect colors detect fine details in the visual field.…

A:

Q: 11. The scales of pine cones are (a) always green. (b) modified roots. (c) modified leaves. (d)…

A:

Q: Explain the typical immunophenotypic features of peripheral B cells in: (i) X-linked…

A: X-linked agammaglobulinemia  also called XLA - is an inherited (genetic) immune system disorder that…

Q: What is represented by a white square? Answers A - D a female without the trait a male with the…

A: Genes are the basic functional unit of an organism that represents the hereditary. It is made by DNA…

Q: The cone system and the rod system: differ in response saturation at high levels of illumination O…

A: Answer :- Option (C) is correct. - are equally specialized for sensitivity of photon capture.

Q: Which of these fundamental concepts is well illustrated by genetic exchange among, but distinct…

A: Evolution is the change in the specific features of a species over several generations and depends…

Q: A factor to show to effect the acute toxicity for many chemicals in the stomach A Presence or…

A: 9. Sex, epigenetic changes, and polymorphisms in gene products xenobiotic-metabolizing elements…

Q: Concerns with the resident microflora of the Gl tract and certain toxicants include A Microflora are…

A: 18. The most essential enzymes engaged in the phase I metabolism of medicines and toxins in…

Q: ndicate whether each of the following statements are true of depurination, deamination or pyrimidine…

A: DNA is a long polymer of nucleotide. A nucleotide is made ip of sugar, nitrogenous bases, and…

Q: Osmotic pressure Hydrostatic pressure

A: The osmotic pressure is the minimal pressure required to prevent the inward flow of a solution's…

Q: 7. Bromophenol Blue, a reagent or standard that is usually used to determine the void volume of a…

A: NOTE: since you have posted multiple questions, So we will be solving the first three parts for you.…

Q: Contrast positive versus negative regulation of gene expression. Describe the role of the repressor…

A: Positive and negative control of gene expression In some cases, the product of a regulatory gene is…

Q: How was the first natural antibiotic discovered? (To answer this question, identify the antibiotic,…

A: Antibiotics are antimicrobial substances that are active against microorganisms. It is the most…

Q: While blood type incompatibility is rarely a problem during pregnancy, Rh incompatibility can be. Rh…

A: i) Rh incompatibility occurs only if the mother is Rh- and the child is Rh+ because mothers Rh-…

Q: Sickle cell 1). how many people does it affect? 2) Is it genetic and if so what chromosome is the…

A: Sickle cell Sickle cell or sickle cell disease (SCD) is a rare genetic disorder in which the red…

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.