Which of the following is correct with respect to kingdom Plantae?
(a.) All plants are heterosporous.
(b.) All plants contain vascular tissue.
(c.) In plants, antheridia are the female sex organ.
(d.)Except for algae, all plants bear embryo.

Options

A. a and c
B. b and d
C. a , b and c
D. Only d

Answer

To determine which statement is correct with respect to kingdom Plantae, we will analyze each option provided in the question:

1. **Option (a): All plants are heterosporous.**
- This statement is **incorrect**. Plants can be either homosporous (producing one type of spore) or heterosporous (producing two types of spores: microspores and megaspores). Therefore, not all plants are heterosporous.

2. **Option (b): All plants contain vascular tissue.**
- This statement is also **incorrect**. Vascular tissue, which includes xylem and phloem, is present in higher plants (like pteridophytes, gymnosperms, and angiosperms) but is absent in non-vascular plants such as bryophytes (mosses and liverworts).

3. **Option (c): In plants, antheridia are the female sex organ.**
- This statement is **incorrect**. Antheridia are the male sex organs in plants, responsible for producing sperm. The female sex organs are called archegonia.

4. **Option (d): Except for algae, all plants bear embryo.**
- This statement is **correct**. Algae (which belong to the group Thalophyta) do not have a true embryonic stage, while all other groups of plants (like bryophytes and higher plants) do develop embryos.

After analyzing all the options, we find that the only correct statement is:

**Correct Answer: (d) Except for algae, all plants bear embryo.**