Which of the following characteristics is incorrect with respect to cockroach ?
10th abdominal segment in both sexes, bears a pair of anal cerci.
A ring of gastric caeca is present at the junction of midgut and hind gut.
Hypopharynx lies within the cavity enclosed by the mouth parts.
In females, 7th-9th sterna together form a genital pouch.
The Correct Option is B
Solution and Explanation
The correct answer is option (B): A ring of gastric caeca is present at the junction of midgut and hind gut.
Top NEET Biology Questions
- The chronological order of human evolution from early to the recent is
- Upper part of sea/aquatic ecosystem contains
- Where is respiratory electron transport system (ETS) located in plants ?
- Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen ?
- Three of the following pairs of the human skeletal parts are correctly matched with their respective inclusive skeletal category and one pair is not matched. Identify the non-matching pair. .
Pair of skeletal parts Category (a)$\,\,$ Sternum and ribs$\,\,$ Axial skeleton (b)$\,\,$ Clavicle and glenoid cavity$\,\,$ Pelvic girdle (c)$\,\,$ Flumerus and ulna$\,\,$ Appendicular skeleton (d)$\,\,$ Malleus and stapes$\,\,$ Ear ossicles
Top NEET Kingdom Animalia Questions
- In which one of the following the genus name its two characters and its phylum are not correctly matched, whereas the remaining three are correct
Genus name Characters Phylum (a) Pila (i) Body segmented
(ii) Mouth with radulaMollusca (b) Asterias (i) Spiny skinned
(ii) Water vascularsystemEchinodermata (c) Sycon (i) Pore bearing
(ii) Canal systemPorifera (d) Periplaneta (i) Jointed appendages
(ii) Chitinous exoskeletonArthropoda - The lower jaw in mammals is made up of
- Select the correct statements with reference to chordates.
A. Presence of a mid-dorsal, solid and double nerve cord.
B. Presence of closed circulatory system.
C. Presence of paired pharyngeal gill slits.
D. Presence of dorsal heart
E. Triploblastic pseudocoelomate animals.
Choose the correct answer from the options given below: - The unique mammalian characteristics are:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrates
Reason (R): Notochord is replaced by the vertebral column in the adult vertebrates.In the light of the above statements, choose the most appropriate answer from the options given below:
Top NEET Questions
- A $100.0\, mL$ dilute solution of $Ag ^{+}$is electrolysed for $15.0$ minutes with a current of $1.25 \,mA$ and the silver is removed completely. What was the initial $\left[ Ag ^{+}\right]$?
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Concepts Used:
Classification of Animals
Classification of Animal Kingdom:
One of the most fundamental forms of classification of animals is the presence or absence of the notochord. Hence, two major groups exist, namely: Chordates and Non-chordates
Non-chordates and the Chordates-
- The notochord is a flexible rod made out of a material similar to cartilage. If an animal has a notochord during any stage of its life, it is classified as a chordate. Contrary to popular belief, chordates do not exclusively include vertebrates.
- There are invertebrates that possess a notochord during some point in their lives and hence, are classified as chordates. Thus all vertebrates are chordates but not all chordates are vertebrates.
Non-chordates-
- Non-chordates are animals without a notochord – the rod-like elastic structure that supports the body. This phylum consists of a small group of worm-like, marine species with an organ-system level of organization.
- Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates
Vertebrates Classification:
The subphylum Vertebrata is divided into five classes of vertebrates. These five classes of vertebrates comprise of all the species of animals and have developed vertebral column as well as an internal skeleton.
Other characteristic features of vertebrates are-
- Presence of a true vertebral column and internal skeleton with muscle attachment points for body movement.
- A front-side muscular heart with two, three or four chambers.
- Kidneys for excretion and osmoregulation
- A paired appendages which may be fins or limbs.
- Possess notochord during the embryonic stage.
- Vertebrates are the only chordates to possess a brain as a part of the central nervous system.
Classification of Vertebrates-
- Pisces
- Amphibia
- Reptilia
- Aves
- Mammalia