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in science we have to write a final essay describing life on earth. here are the directions:
Write an essay describing life on earth. Which are the first organisms to appear? How are later organisms able to evolve? In what order did they appear? How are they different? Please use the following words in your essay
Algae
Amphibian
Angiosperm
Annelid (Segmented worm)
Arthropod
Asexual reproduction
Bacteria
Biome
Bird
Cell
Charles Darwin
Chordate
Classification
Cnidarian
Cold Blooded
Competition
Consumer
Echinoderm
Environment
Evolution
Fish
Flatworm
Gene
Gymnosperm
Insect
Invertebrate
Mammal
Molecule
Mollusk
Moneran
Natural selection
Niche
Nonvascular plant
Nucleus
Ocean
Organ
Organism
Organ system
Population
Producer
Protist
Reptile
Roundworm
Sexual reproduction
Species
Tissue
Vascular plant
Vertebrate
Virus
Warm blooded

Having some problem Biology question?
1. A student is examining a large, multicellular plant which he believes to represent an entirely new division. The organism produces no pollen or seeds. A cross-section through what appears to be the stem reveals no xylem or phloem tissue. No organs are present. Some specimens have cells that are all haploid; others are composed entirely of diploid cells. The organism cannoth possibly be a(n):
A. Fern D. Vascular plant
B. Alga E. Member of an undiscovered division
C. Moss
2. A child notices two houseflies on the table. One is twice as large as the other. The child asks: “if we feed it plenty of sugars, how long will it take the little fly to grow as big as the big one?”
3.Why are arthropods small?
A. They are the most numerous organisms on the earth.
B. They reproduce rapidly
C. They have exoskeletons
D. Arthropods are a source of food for many other animals
E. They have to fill many ecological niches.
please explain your answer after selecting one of the following. thank you so much