Describe some of the hypotheses on the origin of life and the characteristics of early prokaryotes, eukaryotes, and multicellular organisms.

Explain Molecular Similarities of All Life-Forms?

Which of the following organisms appeared on earth first?     Prokaryotes     Eukaryotes     Animals     Plants

How does the process of evolution drives the diversity and unity of life? Explain the question briefly.

1) Select the concept below that best demonstrates compartmentalization of function in living things. Group of answer choices horizontal gene transfer flatness of flatworms organelles in eukaryotic cells circular chromosome of prokaryotic cells the Miller-Urey experiment gastrovascular cavity the RNA World hypothesis

The evolution of eukaryotes was most directly enabled by which of the following? a. Diversification within prokaryotes b. Chemical evolution of organic polymers c. Evolutionary split between prokaryotes and archaea d. Prokaryotic autotrophs increasing atmospheric oxygen e. Decrease of the Earth's surface Which of the following statements is true about ribonucleic acid? I. RNA carries genetic information II. RNA can serve structural and catalytic roles III. Air replicating organisms contain RNA a. I only b. II only c. III only d. I and II only e. I, II, and III

Based on the emerging data, should the existing ‘3 Domains of Life – Archaea, Bacteria, Eukarya’ be formally revoked and replaced by only 2 Domains? Provide 3 reasons.

A scientist discovered a new group of unicellular organisms that lack mitochondria but possess an organelle related to the endoplasmic reticulum and is involved in energy production. The scientist hypothesizes that this organelle might be a missing link in the evolution of mitochondria. A) Do you agree with this hypothesis? Explain. B) Based on the available evidence, what is the most likely hypothesis for the origin of mitochondria? Provide four pieces of evidence to support this theory and justify why they are valid.

According to Lynn Margulis's theory of endosymbiosis, bacteria entered large cells either as parasites or as undigested prey as illustrated. All the following are proof that mitochondria and chloroplast evolved from bacteria, except: Endosymbiosis in a nutshell: 1. Start with two 2. One bacterium engulfs the other. 3. One bacterium now lives inside the other. independent bacteria. 4. Both bacteria benefit from the arrangement. 5. The internal bacteria are passed on from generation to generation. O a they each have a double membrane they have chromosomes similar in shape to their host they are the size of bacteria their DNA is different from its host

Explain Oparin-Haldane theory of chemical evolution of life.