09:42The Reproductive Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36CrashCourse563views
Multiple ChoiceArtichoke hearts are tender and have a strong taste. The leaves have a strong taste, too, but most of an artichoke leaf is fibrous and too difficult to chew. The leaves must contain lots of __________. 518views
Multiple ChoiceThe plant tissue system most analogous to our circulatory system is the __________. 661views
Multiple ChoiceGround tissue is composed of undifferentiated cells with thin walls that are usually involved with storage. The inner portion of the ground tissue of a nonwoody stem is called __________, and the outer portion is called __________. 566views
Multiple ChoiceMost of the photosynthesis in plants takes place in specialized __________ cells called the __________. 690views
Multiple ChoiceWhich of the following correctly describes a feature unique to monocot stems? 488views
Multiple ChoiceIn what order would you pass through tissues when moving from the pith to the epidermis in a plant possessing secondary vascular tissue? 659views
Multiple ChoiceA vandal killed a historic oak tree on the village green by girdling it with a chain saw. He cut through the bark and into the sapwood all the way around the tree. Why did the tree die? 624views1rank
Textbook QuestionWhat is a sieve-tube element? a. the sugar-conducting cell found in phloem b. the widened, perforation-containing, water-conducting cell found only in angiosperms c. the nutrient- and water-absorbing cell found in root hairs d. the nucleated and organelle-rich support cell found in phloem330views
Textbook QuestionThe innermost layer of the root cortex is the a. core. b. pericycle. c. endodermis. d. pith.469views
Textbook QuestionEvaluate the following statements regarding tracheids and vessel elements. Select True or False for each statement. T/F Both tracheids and vessel elements are specialized for water conduction. T/F Both tracheids and vessel elements have pits. T/F Vessel elements have perforation plates but tracheids do not. T/F Tracheids and vessel elements have to be alive in order to transport water.309views
Textbook QuestionSplicing begins: a. as transcription occurs. b. after transcription is complete. c. as translation occurs. d. after translation is complete.495views
Textbook QuestionWhat is the role of companion cells in the movement of sugars through plants? a. They are the sites of sugar production by photosynthesis. d. They are the sites where starch is converted to sucrose. c. They secrete sucrose, which draws sugars through phloem under negative pressure. d. They accumulate sucrose, which is then transferred to adjacent sieve-tube elements.405views
Textbook QuestionCompared with mRNAs that have a cap and tail, predict what will be observed if a eukaryotic mRNA lacked a cap and poly(A) tail. a. The primary transcript would not be processed properly. b. Translation would occur inefficiently. c. Enzymes on the ribosome would add a cap and poly(A) tail. d. tRNAs would become more resistant to degradation.563views
Textbook QuestionWhich of the following would not be seen in a cross section through the woody part of a root? a. sclerenchyma cells b. parenchyma cells c. sieve-tube elements d. root hairs1031views
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