Cell Structure and Function [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Biology]: Questions 240 - 246 of 460
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Question 240
Question MCQ▾
A mature sieve tube differs from a vessel -
Choices
Choice (4) | Response | |
---|---|---|
a. | In lacking a functional nucleus | |
b. | Being nearly dead | |
c. | Lacking cytoplasm | |
d. | Absence of lignified walls |
Question 241
Question MCQ▾
In monocotyledonous roots, the Histogen present at the apex of the root tip is
Choices
Choice (4) | Response | |
---|---|---|
a. | Plerome | |
b. | Dermatogen | |
c. | Calyptrogen | |
d. | Procambium |
Question 242
Question MCQ▾
Vessels differ from tracheids -
Choices
Choice (4) | Response | |
---|---|---|
a. | Because they conduct water | |
b. | In being living | |
c. | In being derived from a single cell | |
d. | In having vertical row of cells with cross walls dissolved |
Question 243
Question MCQ▾
Flesh of a fruit is mostly made up of
Choices
Choice (4) | Response | |
---|---|---|
a. | Parenchyma | |
b. | Collenchyma | |
c. | Sclereids | |
d. | Meristem |
Question 244
Question MCQ▾
Plate meristem shows-
Choices
Choice (4) | Response | |
---|---|---|
a. | Three dimensional divisions | |
b. | periclinal & anticlinal divisions in one plane | |
c. | Anticlinal divisions in two planes at right angle to each other | |
d. | Anticlinal divisions in one plane |
Question 245
Question MCQ▾
Sclerenchymatous cells in their cell walls have large percentage of -
Choices
Choice (4) | Response | |
---|---|---|
a. | Cellulose | |
b. | Lignin | |
c. | Silica | |
d. | Pectin |
Question 246
Question MCQ▾
Plastochron is
Choices
Choice (4) | Response | |
---|---|---|
a. | Region of origin of stem branch | |
b. | Period between initiation of two successive leaf primordia | |
c. | Distance between two successive leaf primordia | |
d. | Region of origin of root branch |