Ciliates differ from all other protozoans in(1) using flagella for loc

1.	Ciliates differ from all other protozoans in(1) using flagella for locomotion(2) having a contractile vacuole for removing excess water(3) using pseudopodia for capturing prey(4) having two types of nuclei
Answer» The correct option is(4) having two types of nuclei Explanation: Ciliates differ from all other protozoans in having two types of nuclei. These two nuclei are usually of different size, i.e. one is meganucleus and the other is micronucleus. The former controls metabolism whereas the latter is concerned with reproductions, e.g. paramecium. In other protozoans, like Amoeba, single nucleus is present which is involved in metabolism and reproduction. Other options are incorrect because Ciliates use filter feeding mechanism for obtaining food. Like other protozoans, they also possess contractile vacuoles. Ciliates use cilia for locomotion.

Ciliates differ from all other protozoans in(1) using flagella for locomotion(2) having a contractile vacuole for removing excess water(3) using pseudopodia for capturing prey(4) having two types of nuclei

Answer»

The correct option is(4) having two types of nuclei

Explanation:

Ciliates differ from all other protozoans in having two types of nuclei.

These two nuclei are usually of different size, i.e. one is meganucleus and the other is micronucleus. The former controls metabolism whereas the latter is concerned with reproductions, e.g. paramecium.

In other protozoans, like Amoeba, single nucleus is present which is involved in metabolism and reproduction.

Other options are incorrect because Ciliates use filter feeding mechanism for obtaining food.

Like other protozoans, they also possess contractile vacuoles.

Ciliates use cilia for locomotion.

Discussion

No Comment Found

Related InterviewSolutions

‘Saheli’ is a new oral contraceptive pill for females with(a) low side effects and low contraceptive value(b) high side effects and high contraceptive value(c) low side effects and high contraceptive value(d) high side effects and low contraceptive value
Nyctalopia also called 'Night Blindness' is a condition making it difficult or impossible to see in relative low light. It is a symptom of several eye diseases. It may exist from birth, or be caused by injury or malnutrition. It is caused in human due to deficiency of vitamin(a) A (b) B (c) C (d) D
Select the correct Match :(1) Ribozyme - Nucleic acid(2) F2 × Recessive parent - Dihybrid cross(3) T.H. Morgan - Transduction(4) G. Mendel - Transformation
A ray of light from rarer medium strikes a denser medium such that reflected and refracted rays make an angle of 90º with each other. The angle of reflection and angle of refraction are 60º and 30º respectively, then refractive index of the medium is(a) 1.5(b) 1.73(c) 1.41(d) 1.75
P, Q and R are three points in a uniform electric field. The electric potential is :(a) minimum at R (b) minimum at Q(c) minimum at P (d) same at all three points
In golden rice crtl (carotene desaturase) gene has been inserted from the(a) Narcissus pseudonarcissus(b) Erwinia uredovora(c) Pseudomonas putida(d) E. coli
Match the Column I with Column II and choose the correct option from the codes given below.Column I (Type of bryophytes)Column II (Features)A.Hepaticopsida1.Capsule without any columellaB.Anthocerotopsida2.Sterile columella presentC.Bryopsida3.Sporophyte well-differentiated into foot, seta and capsuleD.Marchantiales4.RicciaCodesABCD(a)1243(b)1234(c)2134(d)4132
Castle’s intrinsic factor is a glycoprotein secreted by parietal cells is required for the absorption of(a) cobalamine(b) biotin(c) pyridoxine(d) niacin
Identify the incorrect statement(s).I. Ability of an organism to maintain a state of dynamic constancy is called thermoregulation.II. The maintenance of constant internal temperature by an organism is called homeostasis.III. The oldest living plant on earth is the great Indian banyan tree.Choose the correct option.(a) Only I(b) I and II(c) Only III(d) All of these
Match the following columns :Column-IColumn-IIA Calcium1 Required for synthesis of mitotic spindleB Chlorine2 Required to active respiratory enzymeC Manganese3.Essential for constitution of nucleic acidD Phosphorus4. Required for ion ic balanceABCD(a)1324(b)1423(c)4231(d)2341