ELS 11 MODULE 1 Q2

When did the early forms of life exist?

• 1.5 billion years ago

• 2.5 billion years ago

• 4.5 billion years ago

• 3.5 billion years ago

Where is the first form of life seen?

• microfossils

• layers of rocks

• oceanic crusts

• sediments

Which of the following is the first photosynthetic organism to form?

• cyanobacteria

• fungi

• gymnosperm

• algae

Which is not true about the prokaryotes?

• They are simple in structure, small, and unicellular.

• They do not have nucleus.

• They survive in extreme conditions.

• They are not capable of making their own food

Which of the following processes brought changes in the early atmosphere?

• earthquake

• extreme condition

• photosynthesis

• volcanic eruption

The following are multicellular organisms first evolved from colonial aggregates EXCEPT:

• fungi

• protozoans

• sponges

• mollusks

Which of the following statements is NOT correct?

• Photosynthetic organisms decrease the amount of oxygen in the atmosphere.

• Organisms change over time because of adaptation for survival.

• Multicellular organisms evolved from unicellular eukaryotes.

• The earliest forms of life were the prokaryotes

Why do you think the emergence of plants and animals came later than simple living organisms?

• They are too big and take time to form.

• They are the least important factor in the environment.

• Their cell structures are more complex.

• They contain more nucleus compared to lower forms of organisms

Considering the present condition of the environment, do you think living organisms are still evolving today?

• Yes, because humans continuously alter the environment that triggers evolution among living organisms to survive.

• No because the environment remains favorable to living organisms.

• Yes because it is a natural phenomenon which we cannot stop from happening.

• No because there is no condition outside their bodies that will trigger evolution.

Cells without a nucleus are said to be _____________________.

• Eukaryotic

• Prokaryotic