Passage Cells

Q.

What are passage cells?

Q. Endodermis of the root is not completely permeable to water.

1. True
2. False

Q. In a dicotyledonous stem, the sequence of tissues from the outside to the inside is ________________.

1. Phellem - Pericycle - Endodermis - Phloem
2. Phellem - Phloem - Endodermis - Pericycle
3. Phellem - Endodermis - Pericycle - Phloem
4. Pericycle - Phellem - Endodermis - Phloem

Q. In which of the following are radial vascular bundles found?

1. Root
2. Stem
3. Both A and B
4. None of the above

Q. Starch sheath is

1. Endodermis of monocot stem
2. Endodermis of monocot root
3. Petiole of a leaf
4. Endodermis of dicot stem

Q. Passage cells are thin walled cells found in

1. central region of style through which the pollen tube grows toward the ovary
2. phloem elements that serve as entry points for substance for transport to other plants
3. testa of seeds to enable emergence of growing embryonic axis during seed germination
4. endodermis of roots facilitating rapid transport of water from cortex to pericycle

Q. The passage cells in root endodermis are not suberised structure found :-

1. Just opposite to metaxylem element
2. Distributed randomly
3. Just opposite to pith rays
4. Just opposite to protoxylem element

Q. Passage cells are more distinct in endodermis of

1. Dicot stem
2. Monocot stem
3. Dicot root
4. Monocot root

Q. Passage cells are thin-walled cells found in

1. endodermis of roots to facilitate rapid transport of water from cortex to pericycle
2. testa of seed to enable the emergence of growing embryonic axis during seed germination
3. phloem elements that serve as an entry point for substances and transportation to other parts
4. in between xylem vessels for conduction of water

Q. Endodermis mainly

1. Acts as a water tight jacket
2. Provides protection
3. Maintains rigidity
4. Help in transpiration