Which occurrence represents an example of evolution? a. Exposure to radiation reduces the rate of mutation in leaf cells. b. Mutation in a liver cell causes a person to produce an enzyme that is less efficient. c. Some antibiotics are almost useless, because bacteria have developed resistance to them. d. Cells in zygote eventually change into bone cells or skin cells.

Q: The function of the cell membrane is similar to the function of what human organ system

A: The Correct answer is B . Integumentary

Q: Which analogy most closely represents the number of cells in an average - sized adult human? A. The…

A: An analogy is a method of explanation of a complex reality by comparing it to something more easy to…

Q: What is the molecule of inheritance in all living organisms? a.DNA b.Lipid c.Protein d.RNA

A: Origin of life is the starting point for the life processes that is development of living components…

Q: The development of the cell theory was most directly related to the ? 1. improvement of the…

A: Cell theory was proposed by Scheldein and Schwann.

Q: In the case of the Ebola outbreak in the Democratic Republic of the Congo (then called Zaire) in…

A: The objective of the question is to identify the initial transmission method of the Ebola virus to…

Q: which human trait is currently experiencing selective pressure (evolving)?     a. gut size     b.…

A: Selection pressures can be defined as those external agents that mainly affect the survival of the…

Q: Which statement best summarizes the life cycle of Plasmodium falciparum, the organism that causes…

A: P.falciparum is a unicellular protozoan which cause malaria in humans. P.falciparum is one of the…

Q: What is one way in which all eukaryotic cells and all prokaryotic cells are similar? a. They…

A: There are two basic types of cells, eukaryotic cells that have a membrane bound nucleus that hosts…

Q: What changes occurred in the Neolithic period?   A. Increase in dental caries/cavities  B. Increases…

A: The Neolithic period, also known as the New Stone Age, was a time of significant change in human…

Q: when does DNA synthesis occur?  a.

A: The cell cycle consists of several phases: G1 (Gap 1), S (Synthesis), G2 (Gap 2), and M…

Q: Which statement best describes why antifungal treatments may have side effects to our own cells? A.…

A: Introduction A pharmaceutical fungicide or fungistatic, often known as an antifungal drug, is a…

Q: Which statement about bacteria is true? a. Most bacteria cause disease. b. They are responsible for…

A:

Q: muscle loss over time  b. cilia cannot bend  c. fats build up in nerve cells  d.

A: Protein Dynein is a family of motor proteins that transport cargo protein along the negative end of…

Q: Which one is a characteristic of Archae?  A. Cell wall lacks peptidoglycan. B.  Lacks cell wall.…

A: Prokaryotes are the single celled organisms (unicellular) and are the simplest form, which do not…

Q: what simple organic molecules were likely the precursors of life? a. water and proteins b. amino…

A: The two important aspects of life are its origin and evolution. The branch of life science, which…

Q: In birds, where have most of the recent extinctions taken place?   a. In outer space   b. At sea…

A: Extinction: It is the term that tells about the disappearance and ending of the species due to their…

Q: Which derived characteristic would MOST likely explain the results from the genome analysis?   A.…

A: The answer is ----- A. Appearance of vascular tissue

Q: How would an animal cell react in a glass of ocean water?   a. nothing will happen   b. It will…

A: When we put animal cells into pure, fresh water (H2O) , water enters the cells as a result of…

Q: Which is an advantage of asexual reproduction compared to sexual reproduction?      A. Mutations…

A: Reproduction in plants and microorganisms occurs through two types – asexual reproduction and sexual…

Q: How are viruses different from bacteria?  a. Viruses lack enzymes for protein synthesis b. Viruses…

A: Viruses are small infectious particles and contain only nucleic acid and a protein coat. The…

Q: Which is NOT a difference between prokaryotic and eukaryotic cells?   a. Eukaryotes have a plasma…

A: Introduction :- Eukaryotes are a type of cell that make up all multicellular organisms (plants,…

Q: Which of these processes is MOST directly involved in the resorption of a tadpole’s tail during…

A: The process of resorption of tale in tadpoles is one of the most physiologically notable processes…

Q: what is the key aspect of development? a. growth b. lifespan approach c. progess d. evolution

A: Development is defined as the process of becoming bigger, stronger, better, etc. Development play…

Q: Which process is most likely to result in a gene providing antibiotic resistance being found in a…

A: C. Transduction

Q: A vesicle in the cytoplasm is found to contain DNA with nucleotide sequences similar to those found…

A: Cytoplasm is gelatinous material present inside the cell membrane of the cell. It has major…

Q: Why are green algae placed in the Protista while plants are placed in a separate kingdom? a. Green…

A: Green algae are classified in the Protista kingdom due to their simple cellular structure,…

Q: Which statement about stem cells is false? A. Stem cells were first identified in the hematopoietic…

A: Stems are cells that are not differentiated or partially differentiated, that has the capability of…

Q: Which is true of DNA viruses? a. They use the host cell’s machinery to produce new copies of their…

A: Virus is an entity which can resort to various forms replication types. These can have different…

Q: Which statement about red algae and green algae is correct? A. Red algae and green algae are both…

A: Introduction  Plant-like protists are called as the  algae. red and green algae, euglenids, and…

Q: When was the cell theory developed? a. early 1600s b. mid-1600s c. mid-1700s d. mid-1800s

A: Cell theory- Scientists once believed that life evolved spontaneously from nonliving matter. Life…

Q: At the end of which step does the amino acid chain fold into a three dimensional protein?   A.…

A: Mitosis is called as equational type of cell division because the daughter cells which are produced…

Q: Some animals and plants are covered by sharp structures, often called spines. What is the function…

A: Answer: SPINE = These are the pointed , small shaped structure present on the surface of plants and…

Human Evolution

Human evolution is the process of evolution of humans from early man to anatomically modern humans. The process of evolution in humans leads to the gradual development of traits like bipedalism. Humans are the highly social animals that make them the most advanced animal on Earth.  Human evolution is an outcome of interaction among the following processes: