Advertisements
Advertisements
Question
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
Advertisements
Solution
As plants emit CO2 during breathing, plants kept under constant light survive longer. In the case of plants maintained in the dark, CO2 causes a shortage of oxygen, causing the plant to die sooner.
APPEARS IN
RELATED QUESTIONS
Bile, Urea, Uric acid, Ammonia
Define excretion. Name the excretory unit of a kidney.
What job is done by the kidneys?
Fill in the blank.
Malpighian body consists of Bowman’s capsule and .....................
Given below is a set of five terms. Rewrite the terms in their correct order so as to be in logical sequence.
Afferent arteriole, renal vein, secondary capillary network, glomerulus, efferent arteriole.
Given below is a set of five terms. Rewrite the terms in their correct order so as to be in logical sequence.
Renal artery, urethra, ureter, kidney, urinary bladder.
What is dialysis? Under what condition is it carried out?
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
 |
- Define excretion.
- Why does the cortex of the kidney show a dotted appearance?
- Why does the medulla of the kidney show a striped appearance?
- Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure contains the lowest concentration of urea?
Name the Following
The division of the kidney which is light in colour and subdivided into conical renal pyramids.
State the Location: Medulla of Kidney
Write the functional activity of the following structure: Vasopressin
Write the functional activity of the following structure: Henle’s loop
Choose the correct option.
Deproteinised plasma is not found in ______.
Choose the correct option.
Specific gravity of urine would _______ if level of ADH increases.
Answer the following question.
State the role of liver in urea production.
Osmoregulation maintains the osmolarity of blood at about ______.
In order to maintain homeostasis or constant internal environment . ______' is essential.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
Name the organs that store and release the urine.
