Births before _____ weeks are considered premature

1.22
2.26
3.37
4.42


3

Biology & Microbiology

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Based on what you know about the principle of parsimony, which of the following is most likely a symplesiomorphy of mosses, ferns, conifers, and flowering plants?

Given the following cladogram and list of characteristics:



A. Chlorophylls a and b
B. Vascular tissue.
C. Seeds.
D. Flowers.
E. Both chlorophylls a and b and seeds.

Biology & Microbiology

What are population pyramids used to show? 

A. death rates B. birth rates C. competition D. age composition of a population E. the carrying capacity

Biology & Microbiology

Which feature is found in all cells?

a. nucleus containing DNA b. plasma membrane composed of phospholipids c. flagella d. cell wall composed of cellulose e. nucleoid region that contains DNA

Biology & Microbiology

All forms of typhus are associated with arthropod vectors

Indicate whether the statement is true or false

Biology & Microbiology