A. Critically endangered
B. Vulnerable
C. Not evaluated (NE)
D. Least concern
Explanation
According to the IUCN Red List categories , Least Concern (LC) indicates a species is at the l owest risk of extinction, meaning it's widespread and abundant.
Show/Hide Explanation
A. Promote species diversity
B. None of these
C. Inbreeding & lose of genetic diversity
D. Increase biodiversity
Explanation
The major effect of habitat fragmentation is Inbreeding & loss of genetic diversity,
As it leads to reduced gene flow and increased isolation of populations
Ultimately decreasing the genetic diversity and increasing the risk of inbreeding
Show/Hide Explanation
A. None of these
B. SA node
C. AV node
D. Purkajis fibers
Explanation
The heartbeat is normally initiated by the sinoatrial (SA) node, a group of specialized cells in the right atrium , acting as the heart's natural pacemaker.
Show/Hide Explanation
A. The great bear
B. Satellite
C. The milky way
D. Asteroids
Explanation
The constellation of seven bright stars known as the Great Bear is Ursa Major , which also includes the Big Dipper asterism:
Name:
The Latin name Ursa Major means "greater (or larger) bear".
Size:
Ursa Major is the third-largest constellation in the sky and the largest in the Northern Hemisphere
Show/Hide Explanation
پانی اور نمک کے ساتھ تیزاب کے رد عمل سے پیدا ہوتا ہے۔
A. base
B. Hydroxide
C. Aqueous solutions
D. none
Explanation
Acids react with bases to form a salt and water.
Show/Hide Explanation
کون سا بادل شدید بارش کا سبب بنتا ہے؟
A. None of these
B. Strato-cumulus
C. Nimbo-stratus
D. Cirro cumulus
Explanation
Nimbo-stratus clouds are most likely to cause heavy rainfall.
These are thick, dark, and low-lying clouds that often cover the sky.
They are associated with continuous, steady precipitation.
Show/Hide Explanation
مندرجہ ذیل میں سے کون سے اوزون کو ختم کرنے والے مادے ہیں؟
A. Carbon Monoxide
B. Carbon dioxide
C. Chlorofluorocarbons (CFCs)
D. Acetylene
Explanation
Chlorofluorocarbons (CFCs) and other halogenated ozone-depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion.
ozone is made up of O3
اوزون فضا می ں آکسیجن کی تہہ
اوزون ہمیں سورج کی نقصان دہ الٹرا وائلنٹ شعاعوں سے بچاتا ہے۔
اوزون فارمولا: O3
**
ND31-12-2022
Show/Hide Explanation
کاربوہائیڈریٹس کو پودوں اور جانوروں میں درج ذیل متعلقہ شکل میں ذخیرہ کیا جاتا ہے۔
A. Starch and glycogen
B. None
C. Starch and glucose
D. cellulose and glucose
Explanation
Carbohydrates are stored in plants and animals in the form of starch and glycogen respectively.
Show/Hide Explanation
وہ نامیاتی مالیکیول جو مستقل طور پر انزائم سے منسلک نہیں ہوتے ہیں اور زیادہ تر وٹامنز سے حاصل ہوتے ہیں:
A. Activator
B. Deactivator
C. Co-enzymes
D. Prosthetic group
Explanation
Coenzymes are mostly derived from vitamins and other organic essential nutrients in small amounts
Show/Hide Explanation
سنٹی گریڈ میں سلفر کا بولنگ پوائنٹ
A. 420
B. 442
C. 444
D. none of these
Explanation
Boiling point of Sulfur is 444.7°C.
Melting point of Sulfur is 112.8°C.
Element Sulfur Atomic Number 16 Symbol S Element Category Non Metal Phase at STP Solid Atomic Mass [amu] 32.065 Density at STP [g/cm3] 1.96 Electron Configuration [Ne] 3s2 3p4 Possible Oxidation States +4,6/-2 Electron Affinity [kJ/mol] 200 Electronegativity [Pauling scale] 2.58 1st Ionization Energy [eV] 10.36
Show/Hide Explanation
✅ Correct: 0 |
❌ Wrong: 0 |
📊 Total Attempted: 0
iamge