The phylum of seedless vascular plants has about 1000 known living species, including those in the genera
Lycopodium and Selaginella; the gametophyte of some of these species cannot photosynthesize, and instead uses
mycorrhizae to obtain nutrients

a. Hepatophyta
b. Monilophyta
c. Bryophyta
d. Lycophyta
e. Anthocerophyta

D)Lycophyta

Explanation:

The seedless vascular plants or the pteridophyte forms one phylum of the plant kingdom.  The pteridophyte kingdom can be classified into three groups: the Sphenophytes, the pteridophytes and the Lycophytes.

The Lycophyte group contains about 1000 living species as it is the most primitive group of vascular plants. The species is characterised by the presence of the microphyll like the Selaginella and Lycopodium.

The rhizoids of the gametophyte of these plants form the mycorrhizal association with the fungi.

Thus, Option-D is the correct answer.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.