Home
Class 12
BIOLOGY
Which two of the following changes (a-d)...

Which two of the following changes (a-d) usually tend to occur in the plain dwellers when they move to high altitude (3,500 m or more)? (A) Increase in red blood cell size
(B) Increase in red blood cell production
(C ) Increased breathing rate
(D) Increase in thrombocyte count
Change occurring are:

A

(B) and (C )

B

(C ) and (D)

C

(A) and (D)

D

(A) and (B)

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Similar Questions

Explore conceptually related problems

Which two of the following changes (A-B) usually tend to occur in the plain dwellers when they move to high altitudes (3500 m or more ) (A) Increase in red blood cell size (B) Increase in red blood cell production ( C) Increased breathing rate (D) Increase in thrombocyte count

Which of the following statements are false / true (A) Calcitonin regulates the metabolism of calcium (B) Oxytocin stimulates contraction of uterine muscles during birth (C ) Grave's disease is caused by malfunctioning of adrenal gland (D) ADH stimulates absorption of water and increase the urine productions

What happens to the force acting on a current-carrying conductor placed in a magnetic field when : a] current in conductor increases ? b] length of the conductor increases ? c] direction of the current and magnetic field are reversed ? d] direction of the current is reversed without changing the direction of magnetic field ?

Which of the following statements are true/false A.The blood transports CO_(2) comparatively easily because of its higher solubility B.Approximately 8.9% of CO_(2) is transported being dissovled in the plasma of blood C. The carbon dioxide produced by the tissues, diffuses passively into the blood stream and passes into red blood corpsucles and react with water to form H_(2)CO_(3) D.The chlorde ions diffuse from palsma into the erythrocytes to maintain ionic balance

Choose the correct answer among the following options: {:("A Epinephrine","i Increase in muscle growth"),("B Testosterone","ii Decreae in blood pressure"),("C Glucagon","iii) Decrease in liver glycogen content"),("D Atrial natriuretic factor","iv Increase heart beat"):}

Read the following statements and choose the correct option A. Increase in melanized moths after industrialization in Great Britain is a proof for natrual selection B. When more individuals of a population acquire a mean character value, it is called disruption C. Changes in allelic frequency in a population will lead to Hardly Weinberg equilibrium D. Genetic drift changes the existing gene ot allelic frequency in future generations

To find the image - distance for varying object - distance in the case of a convex lens, a student obtains on screen a sharp image of a bright object placed very far from the lens. After that the gradually moves the object towards the lens and each time focuses its image on the screen. (a) In which direction - towards or away from the lens, does he move the screen to focus the object ? (b) What happens to the size of the image - Does it increase or decrease ? (c ) What happens when he moves the object very close to the lens ? (d) What happens to the intensity of the image as the object moves farther and farther away from the convex lens ?