44. Compound eyes are composed of independent visual units called Al retinas B)

Question

44. Compound eyes are composed of independent visual units called Al retinas B) simple eyes. C) ommatidia D) ocell. E) apposition pigments 45. plasmodesmata are found between A) sieve-tube cells. B) compenion cells C) vessel elements D) tracheids E) merismatic cells 46. in plants, the vascular tisue that consists of living cells that distribute sugars throughout the plant is called A) nylem. 3) phicem C) transport tissue. D) stomata. ? lders 47. Transpiration in plants requires all of the following excepe Aj Adhesion of water molecales to cellulose. Cohesion between water moraes. C) Evaporation of water molecuies Active transport through ryen vessels. E) Transport through trachelds 48. How do prokaryates support the growth of plants? A) Prokaryotes fix nitrogen. 8) Prokaryctes fix calcium C) Prokaryotes convert nitrate lons into nitrogen gas D) Prokaryetes form mycornhae ) All of the above 49. What is the primary mechanism that trensports water to leaves? A) evaporation push B) transpirational puil. C) root pressure D) caplary action. E) active transport roed on A) in the incestine of cattle. B) in the gut of termites C) in the blood vessels of humans D) in salt-cured fish. E) in stromatolites

Explanation / Answer

44. The correct option is C - ommatidia

Explanation: Compound eyes are present in the Phylum arthropoda. They are a cluster of several thousands of basic units called ommatidia (singular: ommatidium).

Compound eyes differ completely from eyes of vertibrates.

Ommatidium have four parts namely The LENS or the front part of the facets, a transparent crystalline cone , visual cells and Pigment cells. The pictures formed by a compound eye is not of high quality. It produces a mosaic image which is a pattern of light and black dots.

46. The correct option is B phloem

Phloem is the living vascular tissue that transport the photosynthates from the place of production to place of storage or place of utilisation.

Phloem consists of sieve elements, parenchyma cells and supportive cells.

The sieve elements are sieve tube cells, parenchyma cells are the companion cells and albuminous cells and the supporting cells are fibres and sclerides.

46. The correct option is C vessel elements

It has been observed in several studies that plasmodesmata are present cleary distinguished in differentiating and and mature vessels. They are also present between the sieve elements and companion cells. But here the answer is vessel elements.

47. The correct option is D

Transpiration is a passive process that is the primary method of water transportation in the plant . The movement of water in xylem through transpiration is explained by cohesion- tension theory.

Here as we know that transpiration is a passive process and doesn't need the utilisation of ATP active transport has no role in this.

48. The correct answer is All the above

Prokaryotes like cyanobacteria fix nitrogen that is very essential for the plant growth

We also know that microbes fix calcium carbonate in the soil which are mostly bacteria.

Mycorrhizae are the symbiotic association between the plants and fungi and bacteria which help in absorption of nutrients from the soil.

We have seen that free living bacteria in the soil convert nitrates or fixed nitrogen to nitrogen gas.

49. The correct option is B transpiration pull

We know that transpiration is the only process in plants that help in the movement of water in the xylem for long heights. Root pressure also helps in water movement but only to short heights . Transpiration is explained by cohesion- tension theory.

50. The correct option isD

Halophiles - the word itself says that they are salt loving organisms. They live in extreme saline areas also. So they are present in salt cored fish

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