During night, increase in CO, concentration around the leaf causes_______________.
1.rapid opening of stomata
2.partial closure of stomata
3.complete closure of stomata
4.no effect on stomatal opening
Posted Date:-2022-01-15 07:21:07
Hypertonic solution
1.The outer solution having higher concentration than of the cell sap
2.The outer solution having lower concentration than of the cell sap
3.The outer solution having equal concentration as of the cell sap
4.None of these
Posted Date:-2022-01-15 07:55:09
If a heterozygous tall plant is crossed with a homozygous dwarf plant, then the ratio of the dwarf plant is ________________.
1.25%
2.50%
3.75%
4. 100%
Posted Date:-2022-01-15 07:02:24
In the early mornings, mostly drops of water are found along the leaf margins of herbaceous plants due to:
1.Transpiration
2.Guttation
3.Bleeding
4.Active transport
Posted Date:-2022-01-15 08:41:52
Independent assortment
1.Separation of characters of one parent
2.Non-separation of characters of one parent
3.Combination of parental characters
4.Separation of parental characters
Posted Date:-2022-01-15 07:45:49
Prophase, Anaphase, Telophase, Interphase
1.Interphase
2.Prophase
3.Anaphase
4.Telophase
Posted Date:-2022-01-15 08:14:15
The two cobalt chloride papers are attached, one on the dorsal and the other on the ventral surface of a dorsiventral leaf with the help of glass slide and dlips. The set up is left in the open for few hours
1.Cobalt chloride paper remain blue on the upper surface of the leaf
2.Cobalt chloride paper tum blue to pink on the lower surface of the leaf
3.Cobalt chloride paper turn blue to pink after a long time on the upper surface of the leaf
4.All of these
Posted Date:-2022-01-15 07:40:10
When excess of chemical fertilizers are added in the moist soil around the root hairs:
1.Root hairs become flaccid
2.Root hairs become turgid
3.Root hairs are plasmolysed
4.Root hairs are deplasmolysed
Posted Date:-2022-01-15 08:43:55
A cross was made between tall and dwarf plants. In E generation all plants were tai wnen the F plants were selfed, the tall and dwarf plants appeared in 3:1 ratio in F, generation. This is due to:
1.Dominance
2.Hybridisation
3.Crossing over
4.Segregation
Posted Date:-2022-01-15 07:37:08
After mitotic cell division, a female human cell will have _____________.
1.44 +XX chromosome
2.44 +XY chromosome
3.22+ X chromosome
4.22 Y chromosome
Posted Date:-2022-01-15 07:04:09
Autosomes
1.Determine general body features
2.Determine sex of an organism
3.Organization of micro tubules in the cell
4.Store all of the genetic information of an organism
Posted Date:-2022-01-15 08:20:44
Chromosomes
1.Cell division
2.DNA replication
3.Sex determination
4.All of these
Posted Date:-2022-01-15 08:23:44
Cuticle transpiration
1.Transpiration from leaves through stomata
2.Transpiration directly from surface of the leaves and stems
3.Transpiration through lenticels on the surface of woody stems
4.Transpiration through corky covering of the stems
Posted Date:-2022-01-15 07:54:11
It you put a potato into a sugar solution, it shrinks over time due to ____________.
1.endosmosis
2.Diffusion
3.exosmosis
4.active transport
Posted Date:-2022-01-15 07:09:45
Loss of water through a cut stem or injured part of plant
1.Guttation
2.Turgidity
3.Flaccidity
4.Bleeding
Posted Date:-2022-01-15 06:46:25
Mendel's law obeyed in appearance of a hidden character in some offspring in F, generation
1.Dominance
2.Independent assortment
3.Co-dominance
4.Purity of gametes
Posted Date:-2022-01-15 06:48:48
Mitochondria and chloroplast divide in:
1. Synthesis phase
2.First growth phase
3. Second growth phase
4.Mitosis
Posted Date:-2022-01-15 08:31:05
Muslin cloth, parchment paper cellulose paper, cellophane paper
1.Parchment paper
2.Muslin cloth
3.Cellophane paper
4.Cellulose paper
Posted Date:-2022-01-15 08:18:03
NADPH
1. H, donor during photosynthesis
2.Accepting electrons and hydrogen atoms to form NADP
3.Addition of a phosphate group to ADP
4.Splits off phosphates, becoming ADP+ phosphate
Posted Date:-2022-01-15 08:21:55
Name all the labeling shown in the part of cross section of root in root hair:
1.1-Root hair cell 2-Soil particles 3-Xylem vessel 4- Cortex
2.1- Root hair cell 2-Water molecule 3 Phloem vessel 4 Cortical cells
3.1-Root hair cell 2 Soil particles 3-Xylem vessel 4-Cortical cells
4.1-Root hair cell 2 Water molecule 3-Xylem vessel 4- Cortical cells
Posted Date:-2022-01-15 08:39:20
Name the process that is responsible for the movement of water in the direction indicated by the arrows
1.Diffusion
2.Osmosis
3.Active transport
4.Passive transport
Posted Date:-2022-01-15 08:40:51
Phase in which chromosomes move to the middle of the cell.
1.Anaphase
2.Prophase
3.Metaphase
4.Interphase
Posted Date:-2022-01-15 06:47:24
Phosphate, RNA, Sugar, Nitrogenous base
1.RNA
2.Sugar
3.Phosphate
4.Nitrogenous base
Posted Date:-2022-01-15 08:02:35
Phosphorylation
1.Formation of ATIP from AlD and inorganic phosphate by the utilization of energy
2.Splitting of water molecule into hydrogen ions and hydroxyl n the presence of sunlight
3.Conversion of several molecules of glucos to one molecule of starch
4.Conversion of water and carbon dioxide of sugar in the presence of sunlight
Posted Date:-2022-01-15 07:58:48
Potometer works on the principle of:
1.Osmotic pressure
2.Amount of water absorbed equals the amount transpired
3.Potential difference between the tip of the tube and that of the plant
4.Root pressure
Posted Date:-2022-01-15 07:38:46
Rearrange the pathway of water and solutes from the soil to the conducting tissue of the root.
1.soil - root hair - cortex- endodermis - pericycle - protoxylem - phloem
2.soil - root hair cortex endodermis- pericycle- protoxylem- metaxvlem
3.soil -root hair cortex -pericvcle- endodermis -protoxylem metaxylem
4.soilroot hair cortex endodermis pericvcle metaxylem phloem
Posted Date:-2022-01-15 08:48:35
Rewrite the terms in logical sequence as directed at the end of each statement Karyokinesis, S-phase, Cytokinesis, Gphase, G,,phase
1.S-phase, M-phase, G-phase, Karyokinesis, Cytokinesis
2.G-phase, S-phase, M-phase, Karyokinesis, Cytokinesis
3.G,phase, S-phase, Gphase, Cytokinesis, Karyokinesis
4.Gphase, S-phase, G phase, Karyokinesis, Cytokinesis
Posted Date:-2022-01-15 08:37:19
Root hairs
1.Ability to transport nutrients into the core of the root
2.Adapted to absorb light efficiently
3.Absorbing water and minerals, anchoring and supporting the plant, and storing food
4.Regulate gas exchange between the plant and environment and control of water loss
Posted Date:-2022-01-15 08:22:45
Scientific name of garden pea, which Mendel used for his experiments
1.Pisum sativum
2.Mimosa pudica
3.Coriandrum sativum
4.Allium sativum
Posted Date:-2022-01-15 06:44:51
Sweat out of water along with dissolved substances directly in the liquid form from the margins of the leaves is known as______________.
1.transpiration
2.respiration
3.guttation
4.bleeding
Posted Date:-2022-01-15 06:57:29
Temperature, sunlight, wind velocity, water content of leaves, humidity
1.Humidity
2.Water content of leaves
3.Wind velocity
4.Temperature
Posted Date:-2022-01-15 08:16:13
The cell cycle shows two phases of cell division. Which of the following option is true?
1.A-Interphase- Cell is growing and preparing for cell division
2.B-G phase- RNA and protein synthesised
3.C-Synthesis phase- More DNA replication occur
4.All of these
Posted Date:-2022-01-15 08:32:46
The recessive gene is one that expresses itself in:
1.Heterozygous condition
2.Homozygous condition
3.F,generation
4.Y-linked inheritance
Posted Date:-2022-01-15 07:42:05
Thylakoids
1.Opening and closing the pores in the leaves
2.Site for light-dependent reactions of photosynthesis
3.Transport of water and minerals vertically
4.Site for light-independent reactions of photosynthesis
Posted Date:-2022-01-15 08:25:46
Tissue responsible for transportation of food in the plant
1.Phloem
2.Xylem
3.Cambium
4.Vacuole
Posted Date:-2022-01-15 06:52:51
Transpiration
1.Loss of water from the surface of water bodies in the form of vapour
2.Loss of water from the aerial parts of the plants in the form of water vapour
3. Loss of water from the leaf margins in the form of liquids
4.Loss of water from an injury in the form of liquids from the parts of plants
Posted Date:-2022-01-15 07:59:57
Transpiration, Photosynthesis, Phagocytosis, Guttation
1.Photosynthesis
2.Phagocytosis
3.Guttation
4.Transpiration
Posted Date:-2022-01-15 08:03:43
When water enters the cell, one of the pressure is exerted on cell wall
1.Osmotic pressure
2.Suction pressure
3.Turgor pressure
4.Root pressure
Posted Date:-2022-01-15 07:23:32
Which one of the following shows the 'Resting phase of the cell?
1.C-Synthesis phase
2. G-Anaphase
3.H-Telophase
4.A- Interphase
Posted Date:-2022-01-15 08:28:08