B.

it is hygroscopic

Sphagnum is a bryophyte, commonly called as bog moss or peat moss. It is hygroscopic and possesses a remarkable water holding capacity. Hence, it is used as a packing material in the transportation of flowers, live plants, tubers, bulbs, seedlings etc. It is also used in seedbeds and in moss-sticks.

B.

pores on lateral walls

The wall of both vessel and sieve tube elements are perforated by large opening. Due to this adaptation, the cell to cell contact is possible. The vessels are nucleated whereas the sieve tube elements are enucleated.

B.

Cytoplasmic

The members of Myxomycetes are called slime molds because they contain and secrete slime. They are included in lower fungi. Their somatic phase is a  multinucleate, diploid holocarpic Plasmodium (a product of syngamy).
In Plasmodium, propagation occurs through fission or thick walled cysts or sclerotium-like structures. Reproduction takes place by the formation of uninucleate, thick-walled resting spores which are produced within minute fruiting bodies like structures i.e., the sporangia, however, the true fruiting bodies are absent in slime molds.
Fruiting bodies and mycelium are absent in lower fungi Protonoma is not formed in fungi.

D.

Marginal

In sweetpea (Pisum sativum), the placentation is marginal, in which the placenta develops along the junction of two carpels, in a unilocular ovary. In basal placentation, the ovules are few or reduced to one and are borne at the base of ovary. e.g. compositae.
In axile placentation, margins of carpels fold inwards, fusing together in centre of ovary to form a single central placenta. Ovary is divided into as my locules, as there are carples e.g., Hibiscus, Asphodelus. Free-central placentation possesses a placenta arises as a central upgrowth from ovary base e.g. Stellaria.

B.

The enzymes of the electron transfer chain are embedded in the outer membrane

In mitochondria, the enzymes of electron transport chain are found in the inner membrane while outer membrane contains enzymes involved in mitochondrial lipid synthesis and those enzymes that convert lipid substrates into forms that are subsequently metabolised in the matrix.
The outer membrane resembles a sieve that is permeable to all molecule of 10,000 daltons mole. weight or less including small proteins.
The inner membrane is impermeable and highly convoluted, forming a series of infoldings, known as cristate, in the matrix space.