Tag: importance and classification of angiosperms
Questions Related to importance and classification of angiosperms
The correct sequence of plants in hydrosphere is :
-
$Oak \rightarrow Lantana \rightarrow Volvox \rightarrow Hydrilla \rightarrow Pistia \rightarrow Scirpus$
-
$Oak \rightarrow Lantana \rightarrow Scirpus \rightarrow Pistia \rightarrow Hydrilla \rightarrow Volvox $
-
$Volvox \rightarrow Hydrilla \rightarrow Pistia \rightarrow Scirpus \rightarrow Lantana \rightarrow Oak$
-
$Pistia \rightarrow Volvox \rightarrow Scirpus \rightarrow Hydrilla \rightarrow Oak \rightarrow Lantana$
Plants which grow in shade are called
-
Sciophytes
-
Heliophytes
-
Oxylophytes
-
Epiphytes
Resource partinotiong can only take place when
-
Species have different feeding manner
-
Species only have different foraging manner.. no matters feeding type different or same
-
Different fedding and foraging time
-
None
Resource partitioning is the phenomenon of evolutionary changes seen in species in response to the selection pressure generated by interspecific competition. Due to this, no two organisms within the same species can coexist in the same niche if they have same resources. They have different foraging manner whether feeding type is different or same. Example of resource partitioning involves two tigers present in their own territories or niches and defending it from other tigers.
Excessive aerenchyma tissues in the plants is mainly an adaptation for.
-
Xerophytes condition
-
Hydrolytic condition
-
Epiphytic condition
-
Niesophytic condition
The most effective defence of plants against herbivores are
-
Morphological
-
Chemical
-
Temporal
-
Developmental
To counter the herbivore attack, plants produce specialized morphological structures or secondary metabolites and proteins that have toxic, repellent effects on the herbivores. Plants confront the herbivores both directly by affecting host plant preference or survival and reproductive success (direct defense), and indirectly through other species such as natural enemies of the insect pests (indirect defense). Direct defenses are mediated by plant characteristics that affect the herbivores biology such as mechanical protection on the surface of the plants (e.g., hairs, trichomes, thorns, spines, and thicker leaves) or production of toxic chemicals such as terpenoids, alkaloids, anthocyanins, phenols, and quinones) that either kill or retard the development of the herbivores.
Submerged hydrophytes have commonly dissected leaves for
-
Decreasing surface area
-
Increasing surface area
-
Reducing effect of water currents
-
Both B and C
The submerged leaves are often highly dissected or divided. This has the advantage of creating a very large surface area for absorption and photosynthesis. It also minimises water resistance and hence, potential damage to the leaves since moving water (currents and waves) can be damaging to the leaves of the plant.
In xerophytes, photosynthesis, often occurs through
-
Root
-
Modified stem
-
Stomata
-
Scaly leaves
Xerophytes are plants, that have small amount of water or moisture, so they have adaptations that allow them to survive in these harsh conditions. These plants are like cactus and other succulents are typically found in deserts.
One of the advantages of growing chilli plants between two rows ofgreen gram plants, is that
-
Chilli plants are protected by the shade of dhal plants
-
Nitrogenous fertiliser prepared by green gram plants can be utilised
by chilli plants -
Chilli plants get water from green gram plants
-
Dhal plants are protected from pests in the presence of chilli plants
Which one of the following is correct matching of a plant, its habit and the forest type where it normally occurs?
-
Prosopis, tree, scrub
-
Saccharum, grass, forest
-
Shorea robusta, herb, tropical rain forest
-
Acacia catechu, tree, coniferous forest
Belt's corpuscles occur on
-
Casuarina roots
-
Casuarina leaves
-
Leaves of Acacia sphaerocephala
-
Roots of Acacia sphaerocephala
Belt's corpuscles are certain corpuscles containing food secreted by the plants at the tips of their leaflets for ants to maintain myrmecophily. They are seen in leaves of acacia sphaerocephala as it is a myrmecophile.