The __________ gland produces hormones and is the site where __________ (a kind of white blood

cell) mature. Fill in the blank(s) with the appropriate word(s).


thymus; T-lymphocytes

Biology & Microbiology

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Members of which fungal phylum form associations with approximately 90% of land plants by forming mycorrhizae

with them?

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Younger honeybees have higher levels of juvenile hormone

Indicate whether the statement is true or false.

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An infectious disease with occasional new cases reported in random locales at irregular intervals is said to be ____

a. sporadic b. endemic c. pandemic d. epidemic

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Which of the following extraembryonic membranes

forms fingerlike projections that become part of the placenta? a. amnion b. yolk sac c. chorion d. allantois e. none of these

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