Excretion in living organisms - class-X
Description: excretion in living organisms | |
Number of Questions: 35 | |
Created by: Sanjiv Memon | |
Tags: through the alimentary canal transportation in plants and animals excretion - the wastage disposing system excretion in living organisms life process: nutrition, transportation, respiration, excretion biology transportation in animal and plants life processes in living organism excretion to maintain homeostasis zoology excretion life processes |
Which of the following is the most toxic excretory product?
Which of the following pairs is wrong?
Which one of the following statements is incorrect?
The following substances are the excretory products in animals. Choose the least toxic from among them.
The characteristic(s) common to 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 all equally toxic.
(iv) They are produced in the kidneys.
Arrange the following in correct order based on increasing toxicity.
(b) Uric acid
(c) Ammonia
Excretory products of mammals are useful to plants. Which of the following is not a part of such secretions?
What is the first excretory substance in animal body?
Which living organism is not a uricotelic?
Animals return water to the environment by
(i) Perspiring
(ii) Drinking
(iii) Urinating
(iv) Breathing
State whether the following statement is true or false.
Some organisms store wastes in body parts.
Assertion : Earthworms excrete both ammonia and urea
Reason : Excretion in earthworm depends on the
environment.
Most abundant, harmful and universal waste product of metabolism is
Which one is both osmoregulator as well as nitrogenous product?
Excretory product of spider is
A portion of uric acid is changed into urea and ammonia by intestinal
Characteristics shared by urea, uric acid and ammonia are
a. They are nitrogenous wastes
b. They need a large amount of water for excretion
c. They are equally toxic
d. They are produced in kidneys.
The first formed nitrogenous waste of vertebrates is
Which is not a ketone body?
How many molecules of ammonia are required to form 8 molecules of urea?
Which of the following statement, is false?
Ketone bodies consist of
Which of the following sets of animals produce the same substances as their chief excretory product?
Study the following.
(i) Uricase enzyme is not found in apes and man.
(ii) Purine metabolism leads to the formation of uric acid.
(iii) In ureotelic organisms, carbondioxideCO2 and ammonia converted into urea through the Cori cycle.
(iv) More energy consumed is for the production of uric acid.
(v) TMO (Trimethylamine oxide) protects the proteins from the effect of urea in Chondrichthyes fishes.
Which of the given statements are correct?
Some animals convert highly toxic $NH _3$ into least toxic trimethylamine oxide $(TMAO)$ and retain high concentration of $TMAO$ and urea to minimise $H _2O$ loss from body are
Aquatic plants excrete metabolic wastes through
The stored waste product in plants can be in the form of
Which of the following is excreted by the plant roots?
Tannin is stored in
The secondary metabolite obtained from Catharanthus roseus is
How do leaves of plants help in excretion?
How do plants get rid of their excretory products?
Plants get rid of waste by which of the following method?
Excretion of wastes produced during photosynthesis in plants takes place through
In deciduous tree, waste is stored in