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What are the two features of brown algae? Give two examples.
The two main features of brown algae are (i) They are multicellular eukaryotic algae. (ii) They are fucoxanthin and phycocolloid rich members. e.g., Laminaria and Fucus.
The two main features of brown algae are
See less(i) They are multicellular eukaryotic algae.
(ii) They are fucoxanthin and phycocolloid rich
members.
e.g., Laminaria and Fucus.
Write the name of sex organs in pteridophytes and briefly describe them.
The gametophytes bear male sex organs called antheridia and female sex organs called archegonia. Antheridium is sessile and surrounded by a single-layered jacket. Archegonium is flask-shaped. It is partially embedded in the gametophyte.
The gametophytes bear male sex organs called antheridia
See lessand female sex organs called archegonia. Antheridium is
sessile and surrounded by a single-layered jacket.
Archegonium is flask-shaped. It is partially embedded in
the gametophyte.
In how many groups, bryophytes are classified? Name them.
Bryophytes are classified into two groups. That are liverworts and mosses.
Bryophytes are classified into two groups. That are
See lessliverworts and mosses.
Describe the nature of seeds in gymnosperms.
Seeds in gymnosperms are naked, i.e., without ovary wall.
Seeds in gymnosperms are naked, i.e., without ovary
See lesswall.
In which angiosperms secondary growth occurs?
Dicot angiosperms show secondary growth in their stems and roots.
Dicot angiosperms show secondary growth in their
See lessstems and roots.
How flowering plants help pollinators to attract towards them?
Flowering plants help pollinators to attract towards them by their flower colour and nectar smell.
Flowering plants help pollinators to attract towards them
See lessby their flower colour and nectar smell.
Which part of flower is called sporophyll?
Leaf-like appendages are called sporophylls that sporangia.
Leaf-like appendages are called sporophylls that
See lesssporangia.
Give one example of marine angiosperm.
Zostera
Zostera
See lessName a gymnosperm whose endosperm is edible after roasting.
Pinus gerardiana (chilgoza)
Pinus gerardiana (chilgoza)
See lessHow do pine leaves help in soil erosion?
After falling from tree they cover the soil and absorb rain water and prevent soil from getting evoded.
After falling from tree they cover the soil and absorb rain
See lesswater and prevent soil from getting evoded.