Which statement best describes the relationship between vessel elements and tracheids in angiosperm xylem?

The correct answer is A: Vessels are more efficient in water transport due to perforated end walls, while tracheids are less efficient but provide better mechanical support. Vessel elements in angiosperms have perforations (lacking end walls) allowing efficient water transport, while tracheids with bordered pits provide both transport and mechanical support.

The opening and closing of stomata is primarily regulated by:

The correct answer is B: Turgor pressure changes in guard cells. Turgor pressure changes in guard cells due to osmotic changes regulate stomatal opening. ABA plays a secondary regulatory role.

The tissue that forms a protective layer in older stems and replaces the epidermis is:

The correct answer is B: Periderm. Periderm, consisting of cork, cork cambium, and phelloderm, replaces the epidermis in older stems.

The female gametophyte in angiosperms is:

The correct answer is B: Embryo sac. The embryo sac represents the female gametophyte in angiosperms, typically containing 8 nuclei in a 7-celled structure (Polygonum type).

The most advanced characters of angiosperms include all EXCEPT:

The correct answer is D: Motile male gametes. Angiosperms have stationary male gametes (non-motile sperm). Motile sperms are primitive characters found in bryophytes and some gymnosperms.

Home

Home › Subjects › NEET Botany › Reproduction in Plants

NEET Botany
Reproduction in Plants

Botany questions for NEET UG — Plant Anatomy, Physiology, Reproduction, Ecology.

31 Q 7 Topics Take Mock Test

Difficulty: All Easy Medium Hard 31–31 of 31

Topics in NEET Botany

All Plant Kingdom 100 Plant Anatomy 100 Plant Physiology 100 Reproduction in Plants 60 Genetics & Heredity 20 Ecology & Environment 20 Biotechnology in Plants 20

Q.31 Medium Reproduction in Plants

Which of the following represents the correct sequence of events in double fertilization?

A Fusion of one sperm with egg, followed by fusion of second sperm with polar nuclei

B Fusion of both sperms with egg nucleus

C Fusion of sperm with synergids first

D Fusion of sperm with antipodal cells

Correct Answer: A. Fusion of one sperm with egg, followed by fusion of second sperm with polar nuclei

EXPLANATION

In double fertilization, one sperm fuses with the egg to form zygote, and the other fuses with two polar nuclei to form primary endosperm nucleus.

Test

1 2 3 4

All Subjects & Topics

Govt. Exams

Entrance Exams

Teacher Exams

Subjects

Quick Links

NEET Botany Reproduction in Plants

NEET Botany
Reproduction in Plants