Morphological concept of species. -Biology

Morphological concept of species. -Biology
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Mary’s biological concept of species is mainly based on: (a) Morphological traits (b) Reproductive isolation (c) Modes of reproduction (d) Morphology and reproduction

Description : Mary’s biological concept of species is mainly based on: (a) Morphological traits (b) Reproductive isolation (c) Modes of reproduction (d) Morphology and reproduction

Last Answer : Ans. ((b))

What are the main morphological types for food storage ?

Description : What are the main morphological types for food storage ?

Last Answer : There are 3 main types of staples for food storage.

Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

Description : Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

Last Answer : Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?

Ability of a gene to express more than one characters is called Pleiotropy. ! The occurance of a bacterium in more than one morphological forms is cal

Description : Ability of a gene to express more than one characters is called Pleiotropy. ! The occurance of a bacterium in more than one morphological forms is cal

Last Answer : Ability of a gene to express more than one characters is called Pleiotropy. ! The occurance of a bacterium ... wrong D. If both As and R are wrong.

What are the morphological ?

Description : What are the morphological ?

Last Answer : chemical and functional similarities and differences between lysosomes and peroxisomes? Similarities: lysosomes and peroxisomes are small membranous vesicles that contain enzymes and enclose residual substances from ... , by the degradation of the peroxide into water and molecular oxygen.

What are the main morphological features of birds?

Description : What are the main morphological features of birds?

Last Answer : Birds are animals that present aerodynamic bodies covered with feathers, anterior limbs transformed into wings, pneumatic bones and horny (corneous) beaks. Image Diversity: birds avian body structure

What are the basic morphological features of echinoderms?

Description : What are the basic morphological features of echinoderms?

Last Answer : Echinoderms, as the name indicates (echino = spiny, derma = skin), are creatures with spines originated from an endoskeleton. Their endoskeleton is made of calcareous plaques that besides spines ... have pentaradial symmetry; the radial symmetry in these animals is secondary, present only in adults.

What is the morphological feature of molluscs after which the phylum is named?

Description : What is the morphological feature of molluscs after which the phylum is named?

Last Answer : The word “mollusc” means “soft thing”. Molluscs have soft bodies and this feature explains the name of the phylum. Mollusca - Image Diversity: mollusc structure

What are the main morphological features of arthropods?

Description : What are the main morphological features of arthropods?

Last Answer : Arthropods present three distinguishing features: they are metameric beings (segmented body), they have an exoskeleton made of chitin and they present articulated limbs. Phylum Arthropoda - Image Diversity: arthropod structure

What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods?

Description : What is the morphological characteristic that evolutionarily approximates the beings of the phylum Annelida to arthropods?

Last Answer : The metameric feature, i.e., the body segmentation in metameres, approximates annelids to arthropods since these animals are segmented beings too. (Bristles present in oligochaete and polychaete annelids are also covered with chitin, the same substance of the arthropod exoskeleton.)

Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Description : Which are the morphological features that differentiate the beings of the phylum Annelida from nematodes and platyhelminthes?

Last Answer : Platyhelminthes are worms with flat bodies (flatworms), nematodes are worms with cylindrical but not segmented bodies (roundworms). Annelids are cylindrical worms with segmented bodies (they are metameric).

What are the morphological similarities and differences between nematodes and annelids?

Description : What are the morphological similarities and differences between nematodes and annelids?

Last Answer : Nematodes, like annelids, have a cylindrical elongated body. Annelids differentiate from nematodes by presenting a segmented body (body divided into metameres) and so they are called segmented worms.

What is the typical morphological feature of nematodes that differentiates them from platyhelminthes?

Description : What is the typical morphological feature of nematodes that differentiates them from platyhelminthes?

Last Answer : Nematodes are also known as roundworms. As the name indicates they are not flat like platyhelminthes. In evolutionary grounds with the nematodes the first complete digestive system appears, with mouth and anus, and the pseudocoelom is also a novelty.

What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)?

Description : What is the main external morphological feature that differentiates platyhelminthes from other worms (nematodes)?

Last Answer : Platyhelminthes are also known as flatworms because they are worms with a flat body. This is the main external morphological feature that differentiates them from nematodes (roundworms).

What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other?

Description : What are the two main morphological patterns of cnidarians? Concerning locomotion how do these forms differentiate from each other?

Last Answer : Morphologically, cnidarians classify as polyps or medusae. Polyps are cylindrical and medusae are circular convex, like an umbrella. Both shapes have tentacles. In general polyps are sessile ... cnidarians alternate polypoid and medusoid forms in their life cycle. Image Diversity: polyps medusae

What is Morphological Segmentation? a) Does Discourse Analysis b) Separate words into individual morphemes and identify the class of the morphemes c) Is an extension of propositional logic d) None of the mentioned

Description : What is Morphological Segmentation? a) Does Discourse Analysis b) Separate words into individual morphemes and identify the class of the morphemes c) Is an extension of propositional logic d) None of the mentioned

Last Answer : b) Separate words into individual morphemes and identify the class of the morphemes

The morphological nature of the edible part of coconut is (a) cotyledon (b) endosperm (c) pericarp (d) perisperm.

Description : The morphological nature of the edible part of coconut is (a) cotyledon (b) endosperm (c) pericarp (d) perisperm.

Last Answer : (b) endosperm

Which of the following pairs are correctly matched? Animals Morphological features (i) Crocodile – 4-chambered heart (ii) Sea urchin – Parapodia (iii)Obelia – Metagenesis (iv) Lemur – Thecodont (a) (ii), (iii) and (iv) (b) only (i) and (iv) (c) only (i) and (ii) (d) (i), (iii) and (iv)

Description : Which of the following pairs are correctly matched? Animals Morphological features (i) Crocodile – 4-chambered heart (ii) Sea urchin – Parapodia (iii)Obelia – Metagenesis (iv) Lemur – Thecodont (a) (ii), (iii) and (iv) (b) only (i) and (iv) (c) only (i) and (ii) (d) (i), (iii) and (iv)

Last Answer : (d) (i), (iii) and (iv)

Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? Animals Morphological features (a) Scorpion, spider, – Ventral solid central cockroach nervous system (b) Cockroach, locust, – Metameric Taenia segmentation(c) Liver fluke, – Bilateral symmetry sea anemone, sea cucumber (d) Centipede, prawn, – Jointed appendages sea urchin

Description : Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature? Animals Morphological features (a) Scorpion, spider, - Ventral solid ... symmetry sea anemone, sea cucumber (d) Centipede, prawn, - Jointed appendages sea urchin

Last Answer : (a) Scorpion, spider, – Ventral solid central cockroach nervous system

Phylogenetic system of classification is based on (a) morphological features (b) chemical constituents (c) floral characters (d) evolutionary relationships.

Description : Phylogenetic system of classification is based on (a) morphological features (b) chemical constituents (c) floral characters (d) evolutionary relationships.

Last Answer : d) evolutionary relationships.

Biosystematics aims at (a) the classification of organisms based on broad morphological characters (b) delimiting various taxa of organisms and establishing their relationships (c) the classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies (d) identification and arrangement of organisms on the basis of their cytological characteristics.

Description : Biosystematics aims at (a) the classification of organisms based on broad morphological characters (b) delimiting various taxa of organisms and establishing their relationships (c) the ... (d) identification and arrangement of organisms on the basis of their cytological characteristics.

Last Answer : (b) delimiting various taxa of organisms and establishing their relationships

Which one of the following is true of the hypha? a. It is the morphological unit of the fungus. b. It is visible without a microscope. c. It lacks a cell wall. d. None of the above (A-C) is true.

Description : Which one of the following is true of the hypha? a. It is the morphological unit of the fungus. b. It is visible without a microscope. c. It lacks a cell wall. d. None of the above (A-C) is true.

Last Answer : a. It is the morphological unit of the fungus.

Consider the following statements. Morphological characteristics of a river are represented by : 1. Changes in the river form 2. Changes in the characteristics of the river bed s a result of variation of discharge in the river 3. No change in the river plan form Which of these statements are correct ? a) 1 and 2 b) 1 and 3 c) 2 and 3 d) 3 and 4

Description : Consider the following statements. Morphological characteristics of a river are represented by : 1. Changes in the river form 2. Changes in the characteristics of the river bed s a result of variation of discharge in the river 3. No ... are correct ? a) 1 and 2 b) 1 and 3 c) 2 and 3 d) 3 and 4

Last Answer : a) 1 and 2

pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Description : pharyngeal gill slits in embryonic stage is a a) Anatomical evidence b) morphological evidence c) Embryological evidence d) fossil evidence

Last Answer : c) Embryological evidence

The effective control of morphological similar Phalaris minor in wheat is achieved with a). 2,4-D b). Glyphosate c). Metsulfuron - methyl d). Isoproturon

Description : The effective control of morphological similar Phalaris minor in wheat is achieved with a). 2,4-D b). Glyphosate c). Metsulfuron - methyl d). Isoproturon

Last Answer : d). Isoproturon

The morphological nature of the edible part of coconut is: (1) Cotyledon (2) Endosperm (3) Pericarp (4) Perisperm

Description : The morphological nature of the edible part of coconut is: (1) Cotyledon (2) Endosperm (3) Pericarp (4) Perisperm

Last Answer : (2) Endosperm

Enumerate the morphological adaptations of Xerophytes.

Description : Enumerate the morphological adaptations of Xerophytes.  

Last Answer : Ans: 1. Root system is well developed with more lateral roots with root caps and root hairs. 2. Stem may be stunted and woody with thick bark. Stem may be underground in some. Stem is ... Parkinsonia. Leaves may be succulent as in Aloe and Bryophyllum. Leaf surface is shiny as in Calotropis.  

Enumerate the morphological adaptations of Hydrophytes.

Description : Enumerate the morphological adaptations of Hydrophytes. 

Last Answer : Ans:  1. Roots are either absent (Wolffia, Ceratophyllum) or poorly developed (Hydrilla). Rooted hydrophytes have root caps but not others. Free floating hydrophytes may have Root pockets as ... upper surface in Nymphaea, Victoria, Nelumbo. Swollen and spongy petioles in Eichhornia and Trapa.  

High level knowledge which relates to the use of sentences in different contexts and how the context affect the meaning of the sentences? (A) Morphological (B) Syntactic (C) Semantic (D) Pragmatic

Description : High level knowledge which relates to the use of sentences in different contexts and how the context affect the meaning of the sentences? (A) Morphological (B) Syntactic (C) Semantic (D) Pragmatic

Last Answer : (D) Pragmatic

Biological concept of species. -Biology

Description : Biological concept of species. -Biology

Last Answer : answer:

Static concept of species was put forward by (a) de Candolle (b) Linnaeus (c) Theophrastus (d) Darwin.

Description : Static concept of species was put forward by (a) de Candolle (b) Linnaeus (c) Theophrastus (d) Darwin.

Last Answer : (b) Linnaeus

Species are considered as (a) real basic units of classification (b) the lowest units of classification (c) artificial concept of human mind which cannot be defined in absolute terms (d) real units of classification devised by taxonomists.

Description : Species are considered as (a) real basic units of classification (b) the lowest units of classification (c) artificial concept of human mind which cannot be defined in absolute terms (d) real units of classification devised by taxonomists.

Last Answer : (c) artificial concept of human mind which cannot be defined in absolute terms

When we place fossil specimens into different species based on their physical appearance, we are using the ___________ concept. A) biological species B) paleospecies C) anagenetic species D) monospecies

Description : When we place fossil specimens into different species based on their physical appearance, we are using the ___________ concept. A) biological species B) paleospecies C) anagenetic species D) monospecies

Last Answer : B) paleospecies

According to the biological species concept, horses and donkeys are not considered in the same species because A) they never mate. B) they do not produce fertile offspring. C) they look different. D) they do not share a relatively recent common ancestor.

Description : According to the biological species concept, horses and donkeys are not considered in the same species because A) they never mate. B) they do not produce fertile offspring. C) they look different. D) they do not share a relatively recent common ancestor.

Last Answer : B) they do not produce fertile offspring.