The first plants were _____

a. ferns c. bryophytes
b. flowering plants d. conifers


C

Biology & Microbiology

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The law of segregation would predict that the F2 progeny of F1 heterozygous plants will exhibit a __________

A) 3:1 phenotypic ratio B) 9:3:3:1 phenotypic ratio C) 1:2:1 genotypic ratio D) 9:3:3:1 phenotypic ratio and 1:2:1 genotypic ratio E) 3:1 phenotypic ratio and 1:2:1 genotypic ratio

Biology & Microbiology

Most of the photosynthetic activity of a leaf takes place in the.

A. vascular bundles B. waxy cuticle and epidermis C. palisade and spongy mesophyll D. guard cells and stomata

Biology & Microbiology

A negative feedback system has four steps. Please choose the answer that lists the steps in the correct order.

A. Sensory receptors, stimulus, brain, effectors B. Stimulus, sensory receptors, brain, effectors C. Effectors, brain, sensory receptors, stimulus D. Brain, effectors, sensory receptors, stimulus E. Stimulus, effectors, sensory effectors, brain

Biology & Microbiology

Which of the following events does not put you at risk for contracting a Francisella tularensis infection?

A) adopting a dog from an animal shelter B) a tick bite while out camping C) taking away a wounded rabbit your cat brought back for you D) cleaning a deer that you just shot E) removing an injured squirrel from the road in front of your house

Biology & Microbiology