Types of Excretion

Q. The characteristic that is shared by urea, uric acid, and ammonia is/are,

(I) They are nitrogenous wastes
(II) They all need a very large amount of water for excretion
(III) They are equally toxic
(IV) They are excretory products

1. I and III
2. I and IV
3. I, III and IV
4. I only

Q. Assertion: In birds and reptiles, main excretory product is the combined form of urine and faeces.
Reason: Birds and reptiles have no separate chamber for excretion of urine and faeces.

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

Q.

Match the following:

$\begin{array}{cc}i.\text{Ammonotelism (Bony fishes)}& a.\text{Amino acids}\\ ii.\text{Ureotelism (Frogs)}& b.\text{Guanine}\\ iii.\text{Uricotelism (Birds)}& c.\text{Ammonia}\\ iv.\text{Aminotelism (Molluscs)}& d.\text{Uric acid}\\ v.\text{Guanotelism (Spiders)}& e.\text{Urea}\end{array}$

1. i) $\Rightarrow$ c, ii) $\Rightarrow$ e, iii) $\Rightarrow$ d, iv) $\Rightarrow$ a, v) $\Rightarrow$ b

2. i) $\Rightarrow$ a, ii).$\Rightarrow$ d, iii) $\Rightarrow$ b, iv) $\Rightarrow$ c, v).$\Rightarrow$ e

3. i) $\Rightarrow$ d, ii) $\Rightarrow$ a, iii) $\Rightarrow$ e, iv) $\Rightarrow$ c, v) $\Rightarrow$ b

4. i) $\Rightarrow$ a, ii) $\Rightarrow$c, iii) $\Rightarrow$ d, iv) $\Rightarrow$ b, v) $\Rightarrow$ e

Q. Which one of the following gives the correct categorization of six animals according to the type of nitrogenous wastes (A, B, C), they excrete?

1. B
2. C
3. D
4. A

Q.

Match the following:

$\begin{array}{cc}i.\text{Ammonotelism (Bony fishes)}& a.\text{Amino acids}\\ ii.\text{Ureotelism (Frogs)}& b.\text{Guanine}\\ iii.\text{Uricotelism (Birds)}& c.\text{Ammonia}\\ iv.\text{Aminotelism (Molluscs)}& d.\text{Uric acid}\\ v.\text{Guanotelism (Spiders)}& e.\text{Urea}\end{array}$

1. i). d., ii). a., iii). e., iv). c., v).b

2. i). a ., ii).c., iii). d., iv). b., v).e

3. i).c., ii). e., iii). d., iv). a., v).b

4. i). a., ii). d., iii). b., iv). c., v).e

Q. In comparison to ammonia and urea, uric acid is the least toxic and the least soluble in water.

1. ureoletic animals
2. ammonotelic animals

Q. Uricotelic mode of passing out nitrogenous wastes is found in:

1. Amphibians and Reptiles
2. Insects and Amphibians
3. Reptiles and Birds
4. Birds and Annelids

Q. Uricotelism is found in:

1. Fishes and fresh water protozoans
2. Birds, reptiles and insects
3. Frogs and toads
4. Mammals and birds

Q.

Which of the following is the most toxic nitrogenous waste?

1. Carbon dioxide

2. Urea

3. Uric acid

4. Ammonia

Q.

Ureotelism is found in

1. Mammals

2. Aquatic insects

3. Tadpoles

4. Birds