Reproduction in Protists

Q. How does the Euglena reproduce asexually?

1. Longitudinal binary fission
2. Transverse binary fission
3. Irregular binary fission
4. Multiple fission

Q. In laboratory experiments, two species of the protist Paramecium were grown alone and in the presence of another species. The following graphs show growth of species 1 (left) and species 2 (right), both along and when in mixed culture.


Interpretation of these graphs shows that

1. both species are not affected by interspecific competition
2. both species are affected equally by interspecific competition
3. both species are affected by interspecific competition but species 1 is less affected
4. both species are affected by interspecific competition but species 2 is less affected

Q.

Name an organism which is reproduced by multiple fission.

Q. Which of the following pigments is yellow in colour?

1. Chlorophyll “a’
2. Chlorophyll ‘b’
3. Carotene
4. Xanthophylls

Q. Asexual reproduction produces large number of offspring.

1. True
2. False

Q.

The living organisms can be unexceptionally distinguished from the non living things on the basis of their ability to.......

A) Interaction with the environment and progressive evolution

B) Reproduction

C) Growth & movement

D) Responsiveness to touch

Q. Read the following assertion and reason statements and choose the correct option.

Assertion: Evolution in Escherichia coli can occur in few days
Reason: The rate of evolution depends on the life-span of an organism

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but reason is not the correct explanation of the assertion
3. Only the assertion is true
4. Both assertion and reason are false

Q. If you compared the genetic makeup of an animal produced by parthenogenesis with that of its mother, which of the following would you expect?

1. No genetic similarity
2. About 50 percent genetic similarity
3. Parthenogenetic animals have no mother
4. About 100 percent genetic similarity

Q.

Sexual reproduction is considered beneficial for the protist cell because _______.

1. The number of daughter cells produced upon division higher

2. The uniformity in the distribution of cytoplasmic and nuclear contents is higher

3. Genetic variability and hence higher adaptability/evolutionary changes occur in the next generation

4. Sexual reproduction mediates pathogenicity

Q. Development of new individual from female gamete without fertilization is termed as:

1. Syngamy
2. Embryogenesis
3. Oogamy
4. Parthenogenesis

Q. Why is reproduction important?

Q. The statement 'nothing lives forever, yet life continues' illustrates the role of ______________.

1. Reproduction
2. Morphogenesis
3. Embryogenesis
4. Replication

Q.

The characters given below are of a protostome. Identify the wrong statements.

1). Cleavage or division of the zygote is spiral and determinate.

2). During development process the mouth in these animals forms first and arises

from the blastopore or from its anterior margin.

3). Coelom or body cavity is formed due to splitting of mesoderm.

4). Mesoderm is derived from cells on anterior lip of blastopore.

5). Nerve cord is ventral in position.

6). Cell fate is determined the moment the cell is born.

1. 1, 2 & 3 are Correct - 4, 5 & 6 are Wrong.

2. 4, 5 & 6 are Correct - 1, 2 & 3 are Wrong.

3. 1, 3 & 5 are Correct - 2, 4 & 6 are Wrong.

4. 2, 4 & 6 are Correct - 1, 3 & 5 are Wrong.

5. All the above statements are Correct.

6. All the above statements are Wrong.

Q. Write a note on sexual reproduction in protists.

Q.

Sexual reproduction is considered beneficial for the protist cell because _______.

1. The number of daughter cells produced upon division is higher

2. The uniformity in the distribution of cytoplasmic and nuclear contents is higher

3. Genetic variability and hence higher adaptability/evolutionary changes occur in the next generation

4. Sexual reproduction mediates pathogenicity

Q. pwhat are thr 20 types og monosaccharides

Q. In case of sexual reproduction, newborn show similarities about characters. Explain this statement with suitable examples.

Q. What is difference between plasmotomy, binary and multiple fission?

Q. Choose the correct answers from the alternatives given.
Protostomes development includes all of the following except:

1. spiral cleavage
2. daughter cells sit in grooves formed by prior cleavage
3. cell fate is fixed and can develop in only one way
4. radial cleavage

Q. How does the Euglena reproduce asexually?

1. Transverse binary fission
2. Longitudinal binary fission
3. Multiple fission
4. Irregular binary fission

Q. If you compared the genetic makeup of an animal produced by parthenogenesis with that of its mother, which of the following would you expect?

1. About 50 percent genetic similarity
2. Parthenogenetic animals have no mother
3. No genetic similarity
4. About 100 percent genetic similarity

Q. How does the Euglena reproduce asexually?

1. Transverse binary fission
2. Longitudinal binary fission
3. Multiple fission
4. Irregular binary fission

Q.

Sexual reproduction is considered beneficial for the protist cell because _______.

1. The number of daughter cells produced upon division is higher

2. The uniformity in the distribution of cytoplasmic and nuclear contents is higher

3. Genetic variability and hence higher adaptability/evolutionary changes occur in the next generation

4. Sexual reproduction mediates pathogenicity