Question

9. The fossil evidence indicates that the earliest cells lived about: a. 1.5 million years ago b. 2.5 million years ago c. 3.5 million years ago c. 3.5 billion years ago 10. Charles Darwin first proposed the idea of a. genetic engineering b. gene swapping C. co-dominance d. natural selection 11. The basic difference between a prokaryotic cell an a eukaryotic cell is: a. the presence of a nucleus b. asexual reproduction c. there is no difference d. the presence of RNA 12. Which unit of organization is present in ALL living organisms? a. cell b. tissue c. organ d. community 13. Algae were once classified in the Kingdom Plantae because of structural similarities, before being classified as (now subdivided into many different taxonomic groups). a. Prokaryotic b. Fungi c. Protists d. Animalia 14. A common protozoan that engulfs it nutrients with a pseudopod is a/n: a. Amoeba b. Paramecium c. sporozoan d. Trypanosoma 15. Which of the following is NOT a characteristic of bacteria? a. binary fission b. a cell wall c. presence of plasmids d. membrane-bound organelles 16. This organism is often described as "living in a glass house" because it has a shell made of silica: a. Paramecium b. diatom c. ciliate d. virus 17. The body of a fungus consists of threadlike which form a network called a b. hyphae...gametophyte d. hyphae...mycelium a. mycelia...dikaryon c. sporangia...hypha 18. Fungi have cell walls composed of: a. cellulose c. peptidoglycans b. chitin d. all of these

Answer 1

9] option C . Fossils of microbe colonies currently are the evidence of the first known life on earth dating back to 3.5 million years ago.

10] option d. Natural selection. The theory of evolution by natural selection first formulated in Darwins's book " On the origin of species "in 1959

11]Option a . The basic difference between the prokaryotic and eukaryotic cells is - the presence of a nucleus.

12]option a.Cells are the most basic buliding units of life of all living organisms.

13]Option c. Algae were once classified in kingdom plantae becouse of structural similarities, before classified as protists.

14] option a. A common protozoan thst engulgs it'd nutrients with pseudopod is -an Amoeba.

15] option d. Membrane bound cell organelles is not a characteristic of Bacteria.

16] option b. Diatoms are described as " living in a glass house"becauseit has a cell wall of silica.

17]option d . The body of fungus consists of threadlike hyphae ,which form a network called mycelium .

18] option b. Fungi have cell wall composed of - chitin .