Rhizosphaera needle cast is a fungal disease that affects spruce trees. Which of the following biomes would be most severely affected by an outbreak of this disease?

A. Tundra
B. Tropical rain forest
C. Prairie
D. Taiga
E. Temperate deciduous forest


Answer: D

Biology & Microbiology

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some way responsible for the production of sperm? a. luteinizing hormone b. follicle-stimulating hormone c. gonadotropic-releasing hormone d. testosterone e. human chorionic gonadotropin

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Plasmodium falciparum sporozoites produce merozoites in the human

A. liver B. lymph glands C. blood D. spleen E. brain

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Botulinum toxin- A toxin produced by the bacterium Clostridium botulinum.Known for sometimes lethal poisoning from infected meat products. In modern controlled medical or cosmetic use, the very same toxin is known as Botox.Tetanus toxin- Another very potent neurotoxin produced by Clostridium tetani.Strichnine- A highly poisonous alkaloid produced by the Strychnos nux-vomica tree,historically used to kill rats and other pests.In contrast to these toxins, strychnine acts postsynaptically, to block glycine from binding to receptors on motor neurons. Would you expect the symptoms of strychnine poisoning to be more similar to those of botulinum or tetanus toxin?

A. Tetanus toxin B. Botulinum

Biology & Microbiology