Consider statements about plant biology: 1. Transpiration occurs through stomata. 2. Guttaion occurs through hydathodes. 3. Phloem transports water upwards. Which are correct? MCQ with Answer and Explanation

Question

Consider statements about plant biology: 1. Transpiration occurs through stomata. 2. Guttaion occurs through hydathodes. 3. Phloem transports water upwards. Which are correct?

A. 1 and 2 only

B. 1, 2 and 3

C. 2 and 3 only

D. 1 and 3 only

Answer: Option A

Solution (By JKExamLibrary)

Transpiration is the loss of water vapor primarily through the stomata on the leaf surface. Guttation is the exudation of liquid water from the margins of leaves through specialized structures called hydathodes, usually at night when root pressure is high. Phloem is responsible for the translocation of organic food (bidirectional), while xylem transports water and minerals upwards. Thus, statements 1 and 2 are correct.

This question belongs to: Science Biology

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1

Share Report

The symbiotic nitrogen-fixing cyanobacterium in Azolla is:

A. Oscillatoria

B. Nostoc

C. Anabaena azollae

D. Spirulina

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Anabaena azollae lives in cavities of the water fern Azolla and fixes atmospheric nitrogen. It is used as a biofertilizer in rice paddies.

This question belongs to: Science Biology

Question #2

Share Report

The hormone that stimulates the formation of red blood cells is:

A. Thrombopoietin

B. Colony-stimulating factor

C. Interleukin

D. Erythropoietin

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Erythropoietin (EPO), mainly from kidneys, promotes erythropoiesis in bone marrow. Thrombopoietin stimulates platelets, interleukins are immune cytokines, CSFs for white blood cells. EPO is used to treat anemia.

This question belongs to: Science Biology

Question #3

Share Report

Which structure is common to both prokaryotic and eukaryotic cells?

A. Golgi apparatus

B. Mitochondria

C. Ribosomes

D. Nuclear membrane

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Ribosomes are the only organelles common to both prokaryotes and eukaryotes, though sizes differ: 70S in prokaryotes, 80S in eukaryotes. Nuclear membrane, mitochondria, and Golgi are absent in prokaryotes. Ribosomes are the site of protein synthesis. This commonality supports the universal role of protein synthesis in all life forms. Mycoplasma, the smallest prokaryote, also has ribosomes.

This question belongs to: Science Biology

Explore All Biology MCQs