What factor(s) were responsible for the drastic decline of American chestnut trees in the first half of the twentieth century? Select all that apply.

_____ a fungal pathogen
_____ the introduction of an invasive species
_____ a water mold protist
_____ chestnut blight
_____ a wood-boring beetle


__X__ a fungal pathogen
__X__ the introduction of an invasive species
_____ a water mold protist
__X__ chestnut blight
_____ a wood-boring beetle

Biology & Microbiology

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Which of the following is true of carbon?

A) It forms only polar molecules. B) It can form a maximum of three covalent bonds with other elements. C) It is highly electronegative. D) It can form both polar and nonpolar bonds.

Biology & Microbiology

MMP is controlled of the ECM/basement membrane is _____

a. protein b. translational c. transcriptional d. DNA

Biology & Microbiology

Interferon is a protein that binds to the receptors of non-infected cells causing them to produce substances that interfere with viral replication.

Answer the following statement true (T) or false (F)

Biology & Microbiology

If paedomorphosis via neotony involves the retention of juvenile traits in adults, what is responsible for pae-domorphosis via progenesis?

What will be an ideal response?

Biology & Microbiology