Which of the following adaptations was a key to allowing conifers to be successful in diverse terrestrial habitats?
A. reduction of the sporophyte
B. evolution of fruit
C. evolution of pollen
D. evolution of vascular tissues
C. evolution of pollen
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The epithelial tissue of animal cells is most similar to the ________ of plant cells?
A. ground B. dermal C. xylem D. vascular E. phloem
Transcription starts at a region of DNA called a(n)
a. sequencer. b. promoter. c. activator. d. terminator. e. transcriber.
Four of the five terms listed below describe sets of
chromosomes with extra numbers. Select the exception. a. polyploid b. tetraploid c. diploid d. triploid e. hexaploid
In response to injury, cell fragments called platelets get activated to induce clotting. Activated platelets release factors that can in turn bind to specific membrane receptors on nearby cells. What type of signaling would this be considered?
A. endocrine B. direct contact C. paracrine D. autocrine E. synaptic