Cells called ____ are a type of vascular tissue with long, tapered, overlapping ends. They develop
thick, lignified cell walls and die at maturity, leaving a water conducting tube with pits at the tapered
ends that allow for lateral water transport between cells.
a. sclerenchyma
b. tracheids
c. collenchyma
d. parenchyma
e. vessel members
B
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A mutation in a gene that results in it being expressed in the wrong place or at the wrong time is known as a ____ mutation
Fill in the blank with the appropriate word.
Plants use day-length cues to make preparations for winter, such as increasing the size of roots and other storage organs
A. true B. false
Answer the following statements true (T) or false (F)
1. The fins of lobe-finned fish are supported by extensions of the skeleton and are moved by muscles within the fin whereas the fins of ray-finned fish are supported by flexible, nonskeletal elements and are moved by muscles from within the fish's body. 2. Acanthostega is an important fossil for the understanding of phylogeny because it is an intermediate form between lobe-finned fishes and amphibians. 3. The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences. 4. Some dinosaurs had feathers. 5. In previous times, birds and pterosaurs were contemporaries.
Describe the main functions of the lymph vascular system
What will be an ideal response?