Recent questions in Biology

Regarding habitat and habit of Phylum Coelenterata (Cnidaria) :

asked Jan 3, 2014 by pady_1

1 answer

Regarding Phylum Coelenterata (Cnidaria) :

asked Jan 3, 2014 by pady_1

1 answer

Choose the odd one out :

asked Jan 3, 2014 by pady_1

1 answer

Regarding reproduction in sponges:

asked Jan 3, 2014 by pady_1

1 answer

Sponges have a water transport or canal system which is helpful in:

asked Jan 3, 2014 by pady_1

1 answer

Non-chordates are:

asked Jan 3, 2014 by pady_1

1 answer

1. Animals with notochord are called chordates 2. Those animals which do not form this structure are called hemichordates Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

Regarding Notochord are all correct except:

asked Jan 3, 2014 by pady_1

1 answer

Choose the odd one out (regarding coelem):

asked Jan 3, 2014 by pady_1

1 answer

Choose the odd one out (regarding coelem):

asked Jan 3, 2014 by pady_1

1 answer

In animals: 1. Presence or absence of a cavity between the body wall and the gut wall is not important in classification. 2. The body cavity, which is lined by mesoderm is called coelom.

asked Jan 3, 2014 by pady_1

1 answer

Regarding complexity of the circulatory system in animals: 1. open type - blood is pumped out of the heart and the cells and tissues are directly bathed in it 2. closed type - blood is circulated through a series of vessels of varying diameters (arteries, veins and capillaries).

asked Jan 3, 2014 by pady_1

1 answer

Regarding complexity of digestive system in animals: 1. An incomplete digestive system has single opening to the outside of the body that serves as both mouth and anus. 2. A complete digestive system has two openings, mouth and anus.

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): The digestive system in Platyhelminthes is complete. Reason (R): The digestive system in Platyhelminthes has a single opening to the outside of the body that serves as both mouth and anus Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

Classification of animals is based on all except:

asked Jan 3, 2014 by pady_1

1 answer

Syngamy and Triple fusion are respectively:

asked Jan 3, 2014 by pady_1

1 answer

In Bryophytes: 1. The plant body of liverworts is thalloid and dorsiventral. 2. The plant body of mosses have upright, slender axes bearing spirally arranged leaves. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

Regarding Bryophytes incorrect one is:

asked Jan 3, 2014 by pady_1

1 answer

Regardnig Alternation of generations choose the incorrect one:

asked Jan 3, 2014 by pady_1

1 answer

Plant life cycle and alternation of generations: 1. The haploid plant body represents a gametophyte. 2. The haploid plant body produces gametes by meiosis. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

In plants: Assertion (A): The body of a plant may be - haploid sporophyte and diploid gametophyte. Reason (R): In plants, both haploid and diploid cells can divide by mitosis. Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

Identify the correct statement:

asked Jan 3, 2014 by pady_1

1 answer

Identify the correct sequence:

asked Jan 3, 2014 by pady_1

1 answer

Each embryo-sac has a three-celled egg apparatus that includes –

asked Jan 3, 2014 by pady_1

1 answer

Angiosperms include:

asked Jan 3, 2014 by pady_1

1 answer

The male and the female gametophytes do not have an independent free-living existence and they remain within the sporangia retained on the sporophytes in

asked Jan 3, 2014 by pady_1

2 answers

In gymnosperms : 1.The megaspore mother cell is differentiated from few of the cells of the nucellus. 2.The nucellus is protected by envelopes and the composite structure is female cone. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

In Gymnosperms : 1. The male or female cones or strobili may be borne on the same tree as in Pinus 2. In cycas male cones and megasporophylls are borne on different trees. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

1. One of the angiosperms, the giant redwood tree Sequoia is one of the tallest tree species. 2. The leaves in gymnosperms are ill-adapted to withstand extremes of temperature, humidity and wind. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

In conifers (Gymnosperms):

asked Jan 3, 2014 by pady_1

1 answer

Gymnosperms include:

asked Jan 3, 2014 by pady_1

1 answer

The gymnosperms are plants in which:

asked Jan 3, 2014 by pady_1

1 answer

The pteridophytes are further classified into following classes except:

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): The spread of pteridophytes is unrestricted and have spread to many geographical regions Reason (R): The gametophytes of pteridophytes require cool, damp, shady places to grow and need for water for fertilisation Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

In pteridophytes: 1. The sporangia produce spores by meiosis in spore mother cells. 2. The spores germinate to give rise to small, multicellular,free-living, mostly photosynthetic thalloid gametophytes called prothallus. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

Choose the incorrect statement:

asked Jan 3, 2014 by pady_1

1 answer

Pteridophytes include:

asked Jan 3, 2014 by pady_1

1 answer

Pteridophytes are used for:

asked Jan 3, 2014 by pady_1

1 answer

Choose the odd one out:

asked Jan 3, 2014 by pady_1

1 answer

1. The sporophyte in liverworts is more elaborate than that in mosses. 2. The mosses have an elaborate mechanism of spore dispersal. Regarding 1 and 2:

asked Jan 3, 2014 by pady_1

1 answer

The predominant stage of the life cycle of a moss is the gametophyte which consists of

asked Jan 3, 2014 by pady_1

1 answer

Regarding liverworts : 1. The plant body of a liverwort is thalloid - dorsiventral and closely appressed to the substrate. 2. The leafy members have tiny leaf-like appendages in two rows on the stem-like structures.

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): Species of Sphagnum, a moss, is used as packing material for trans-shipment of living material Reason (R): They have capacity to hold water. Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

1. Regarding the economic importance of mosses: Species of Sphagnum, a moss:

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): Mosses prevent soil erosion. Reason (R): Mosses form dense mats on the soil, they reduce the impact of falling rain Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A): The main plant body of the bryophyte is called a gametophyte. Reason (R): The main plant body of the bryophyte is diploid. It produces gametes after meiosis Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

1. Bryophytes play an important role in plant succession on bare rocks or soil. 2. The plant body of bryophytes is more differentiated than that of algae. Regarding 1 and 2 :

asked Jan 3, 2014 by pady_1

1 answer

Assertion (A):Bryophytes are also called amphibians of the plant kingdom Reason (R): Bryophytes can grow in both soil and water Regarding (A) and (R) :

asked Jan 3, 2014 by pady_1

1 answer

Bryophytes are found commonly growing:

asked Jan 3, 2014 by pady_1

1 answer

Regarding Floridean starch:

asked Jan 3, 2014 by pady_1

1 answer

Ask Questions, Get Answers