Two Streptococcus Pneumoniae Strains, Agent 1 and Agent 2, Are

question 1

Essay

Two Streptococcus pneumoniae strains, agent 1 and agent 2, are administered to groups of animals at different doses. Mortality rates are then measured for the animals that received each dose level of each agent. Agent 1 is found to have an LD₅₀ of 400. Agent 2 is found to have an LD₅₀ of 600. Which one is producing a capsule and which one is not? How do you know?

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Definitions:

Pollen Tube

In gymnosperms and flowering plants, a tube or extension that forms after germination of the pollen grain and through which male gametes (sperm cells) pass into the ovule.

Pollinated

The transfer of pollen from the male anthers of a flower to the female stigma of the same flower or another flower, leading to fertilization and the production of seeds.

Scentless

Lacking a detectable smell or odor.

Pollen

Fine to coarse powder containing the microgametophytes of seed plants, which produce male gametes (sperm cells) for fertilization.