Which of the following structures encloses the flower before the flower opens?
a) petals
b) corolla
c) carpel
d) calyx
e) style
Ans: d) calyx
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Based on the fossil record of the Rhynie cherts, what structures were present in the earliest vascular plants? Select all correct choices
A. stomata B. cuticles C. extensive root systems D. multi-veined leaves E. sporangia
Which of the following statements regarding Campylobacter infection is incorrect?
A. It can lead to Guillain-Barre syndrome. B. It can cause acute temporary paralysis. C. Campylobacter burrows into the mucosa of the ileum and multiplies. D. It can last over 2 weeks. E. It is caused by a shiga toxin.
What is the name of the area of the organelle in which organelle DNA is packaged?
What will be an ideal response?
Compared with other precipitation tests, agglutination tests are
A) more sensitive. B) less sensitive. C) about equally sensitive. D) highly variable in sensitivity, and thus the sensitivities cannot be compared.