Q: A. Why is the Kingdom Protista not a valid group from an evolutionary perspective?
A: The Linnaean system or taxonomic classification system was explained by the Carl Linnaeus. He was a…
Q: Mitochondria likely originated froma. archaea.b. invaginations of the cell membrane.c. bacteria.d.…
A: They consist of eubacteria and archaebacteria. Eukaryotes have complex internal organisation and…
Q: Mitochondria in protists originated froma. cyanobacteria.b. chloroplasts.c. anaerobic bacteria.d.…
A: Mitochondria can be defined as the membrane-bound cell organelles such as mitochondrion, singular…
Q: Which of the following is not a locomotive organelle of protozoans? a)Pili b)Flagella c)cilia…
A: Protozoans are the unicellular eukaryotes that can either live as a parasite or free-living. Ameba,…
Q: What do you call the type of reproduction wherein each fragment of an organism develop into new…
A: There are two sorts of reproduction: asexual and sexual reproduction. Despite the fact that the…
Q: Select the unique character of archaebacteria. A. Chemosynthetic metabolisms. B. Inhabits extreme…
A: Archae bacteria are ancient form of bacteria and they do not share the lineage with blue green algae…
Q: Mitochondria most likely evolved from _____________. a. a photosynthetic cyanobacterium b.…
A: Introduction: Mitochondria is a cellular organelle that is also known as the powerhouse of the cell.…
Q: Which statement is true of viroids? a. They are single-stranded RNA particles. b. They reproduce…
A: Cell can be defined as the basic structural, functional, and biological unit of all known…
Q: Which of these types of organisms produce cysts as a reproductive structure? bacteria…
A: Reproduction is the process by which an organism produce offsprings by transferring their genetic…
Q: The cell wall is usually found in which eukaryotes?a. fungi c. protozoab. algae d. a and b
A: Any living organisms that are not visible by unaided eyes are said to be microorganisms, such as…
Q: It is thought that the mitochondria and chloroplasts of eukaryotic cells came froma. the development…
A: The main difference between the Eukaryotic cell & Prokaryotic cells is that the Eukaryotic cell…
Q: Protists with the capabilities to absorb nutrients from dead organisms are called_____________. a.…
A: Answer is c.) saprobes.
Q: Plastids that are surrounded by more than twomembranes are evidence of(A) evolution from…
A: Plastides are double-membrane organelles that are present in plant and algae cells. Plastids are…
Q: Which structure plays a direct role in the exchange of genetic materialbetween bacterial cells?a.…
A: Bacteria are defined as small and tiny single-celled organisms. The cell structure of bacteria is…
Q: 1. Discuss how viruses are like "living things" and at the same time unlike them. 2. Many new…
A: Viruses are considered as the connecting link between the living Kingdom and the non living world.…
Q: Both fl agella and cilia are found primarily in a. algae c. fungi b. protozoa d. both b and c
A: Cilia and flagella both are the characteristics which are required for the locomotion of the…
Q: Both flagella and cilia are found primarily ina. algae c. fungib. protozoa d. both b and c
A: Flagella are a whip-like construction that helps in the movement of bacteria. Their main purpose is…
Q: CFCsa. produce chlorine gas. c. are carcinogens.b. cause global warming. d. bind to chromosomes.
A: Ans: CFCs: The chemical which is nonflammable, nontoxic and contains carbon, chlorine and fluorine…
Q: Why is multicellularity adaptive?a. Multicellular organisms reproduce more quickly than…
A: Multicellular consist of many cells whereas unicellular consist of single cell which performs all…
Q: Choanocytes area. a group of protists that are believed to have given rise to animals.b. specialized…
A: Choanocytes are versatile cells. They have flagella that beat to create the active pumping of water…
Q: Virusesa. are usually photosynthetic.b. consist of a single cell.c. consist of DNA or RNA and a…
A: The small, minute, and microscopic organisms are called microorganisms. The main groups of…
Q: Virusesa. have DNA confined in a nucleus.b. are relatively rare compared to living organisms.c. do…
A: Viruses are small and infective particles. These are primarily made up of nucleic acid and proteins.…
Q: In a biology lab, students view a droplet of pond water under a microscope. One student observes a…
A: Microscope are instruments which helps magnify the organisms which are smaller and cannot be seen by…
Q: The theory of endosymbiosis explains how or why ○ free living bacteria became Eukaryotic…
A: Answer : the theory of endosymbiosis explains that : free living bacteria became Eukaryotic…
Q: Which step in the lytic cycle follows attachment of the virus and and release of DNA in to the host…
A: 12) The answer of this question will be option (d). A lytic cycle is the cyclic process in which a…
Q: Having linear chromosomes packaged with histone proteins is characteristic of: A. all…
A: DNA packaging is an important process in living cells as it is impossible to accommodate a large…
Q: An amoeba is which type of microorganism? which is correct a,b,c,d a - a prokaryotic alga b -…
A: Small living organisms that cannot be seen through naked eye and are visible only through suitable…
Q: Which of the following does not possess cilia or flagella? a.)Amoeba b.)Paramecium c.)Trypanosoma…
A: Flagella or cilia are thread-like structures that act as a locomotory organ for bacteria or…
Q: The capsid is composed of protein subunits calleda. spikes b. protomers c. virions d. capsomers
A: A capsid is the protein shell of an infection, encasing its hereditary material.
Q: Protists with the capabilities to perform photosynthesis and to absorb nutrients from dead organisms…
A: Protists are an assorted collection of life forms. While special cases exist, they are basically…
Q: Lysogenic cells have phages that are: A actively synthesizing viral proteins B biosynthesizing only…
A: Phage viruses are viruses that infect the cells of microorganisms. On the basis of their host these…
Q: A meristematic cells a. Are dead b. Have a high cytosol/nucleus ration c. Have a few proplastids…
A: Meristematic cells- they are undifferentiated cells capable of continuous cell division. The new…
Q: Viruses are not considered living things becausea. they are not cells c. they lack metabolismb. they…
A: Viruses are neither living nor non-living. They are obligate parasites.
Q: Bacteria that cause the disease typhus are close relatives of bacteria that evolved into _____.…
A: Bacteria are a type of biological cell. They constitute a large domain of prokaryotic…
Q: Which of the following is NOT a unicelled organism? a. amoeba b. bacteria c. paramecium d.…
A: Cells in unicellular and multicellular organisms function differently, but each cell in each…
Q: New flu strains can arise by______ . a. meiosis c. viral reassortment b. mitosis d. binary fission
A: Introduction:- Influenza The features of the hemagglutinin (H or HA) and neuraminidase (N or NA)…
Q: A cell with a Barr body is______ . a. a bacterium c. from a female mammal b. a sex cell d. infected…
A: A Barr body is defined as a stained X chromosome which is inactivated and found in mostly every…
Q: A group of environmentalists is studying the effects of recent commercial zoning to wildlife acreage…
A: Biodiversity is referred to as an occurrence of different times of ecosystems, species with whole…
Q: A prophage occurs during the reproduction cycle of Select one: O A. A lysogenic virus. B. A lytic…
A: Virus is a microorganism that is neither prokaryotic or eukaryotic. This is because the virus…
Q: Dinobryon is a species of protozoa that reproduce asexually. How can this asexual reproduction be…
A: Protozoa are microscopic unicellular eukaryotes that have a relatively complex internal structure…
Q: Plasmodesmata transports gibberellic acid in: A Protists B Mycoplasma C Virus…
A: Plasmodesmata are the channels between the cells that travel through the cell walls. Plasmodesmata…
Q: Bacteriophages kill their host quickly by____ . a. binary fission c. a lysogenic pathway b. a lytic…
A: Bacteriophages are viruses that use bacterial cells as hosts.
Q: The host cell in the endosymbiosis that produced the firstchloroplasts was a(n) ________.a. early…
A: Introduction Eukaryotes are organisms with a nucleus encased within a nuclear envelope in their…
Q: Identify the structure of bacteria involved in sexual reproduction. A. Ribosomes B. Flagella C.…
A: The structure of bacteria involved in sexual reproduction is pili. Bacteria can't reproduce sexually…
Q: Bacteriophages are O a. cellular components. O b. protistans. O C. viruses. d. prions. O e.…
A: Bacteriophages These are infectious agents, and are also known as phages. These are composed of…
Q: To reproduce sexually, two ciliates join and_______ . a. infect cells c. emit light b. form spores…
A: Ciliates undergo both asexual reproduction and sexual reproduction.
Q: The infective stage of Entamoeba histolytica to man has A. Pseudopodia B. ingested red blood cells…
A: E. histolytica is cosmopolitan amoebic parasite which is found all over the world and infect 35- 50…
Q: If a viral cell penetrates ahealthy rabbit, the cell will divide into two in about one day. After a…
A: A virus is a genetically modified organic particle that infiltrates living cells and utilises the…
Some______ enter and replicate inside human cells.
a. apicomplexans c. trypanosomes
b. water molds d. ciliates
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- It is thought that the mitochondria and chloroplasts of eukaryotic cells came froma. the development of the internal membrane system.b. protists.c. mutation.d. endosymbiosis of bacteriaBacteria are similar to archaea in that theya. arose through endosymbiosis.b. are multicellular.c. live in extreme environments.d. are prokaryotes.Both archaea and eukaryotes have______ . a. peptidoglycan c. a nucleus b. histone proteins d. a capsid
- Having linear chromosomes packaged with histone proteins is characteristic of: A. all archaeobacteria B. all gram-positive eubacteria (monoderms) C. all crenarchaeota D. all gram-negative eubacteria (diderms) E. all eukaryotesVirusesa. have DNA confined in a nucleus.b. are relatively rare compared to living organisms.c. do not evolve.d. may be surrounded by plasma membrane from their host cell.To reproduce sexually, two ciliates join and_______ . a. infect cells c. emit light b. form spores d. exchange micronuclei
- The endosymbiotic theory explains the:a. origin of the first prokaryotic cells.b. origins of mitochondria and chloroplasts in eukaryotes.c. evolutionary relationship between animals, plants, and fungi.d. method of reproduction in protists.Virusesa. are usually photosynthetic.b. consist of a single cell.c. consist of DNA or RNA and a protein coat.d. consist of ATP and a lipid coat.Give an example of a protist that is:(a) a parasite of humans(b) very large and photosynthetic(c) a unicellular species with two flagella and photosynthetic(d) covered in cilia
- The first forms of life on Earth were thought to be_____. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursA principle of biology is that biology affects our society. Whyare the cysts of protists important to epidemiologists, thebiologists who study the spread of disease?Members of the kingdom Protista differ from members ofthe kingdom Monera mainly due to the presence of:(a) RNA(b) Ribosomes(c) Cell wall(d) DNA(e) Membrane-bound nucleus
