The letter a indicates the a cross section of the eudicot root. each letter marks a definite structure. letter a marks the outer layer of the root. letter b marks the small central region of the root. letter c marks a structure that surrounds the central region of the root. letter d marks a cross-like complex in the center of the vascular cylinder, which consists of big oval cells. letter e marks a layer of the vascular cylinder below the endodermis. the letter a indicates the a cross section of the eudicot root. each letter marks a definite structure. letter a marks the outer layer of the root. letter b marks the small central region of the root. letter c marks a structure that surrounds the central region of the root. letter d marks a cross-like complex in the center of the vascular cylinder, which consists of big oval cells. letter e marks a layer of the vascular cylinder below the endodermis. xylem endodermis cortex vascular cylinder epidermis

Letter A indicates the epidermis, which is the outer layer of the root.

Explanation:

The internal structure of the eudicot root consists of three concentrical layers: The epidermis, the cortex, and the central vascular cylinder.

The epidermis is the outer layer of the root. It covers the totality of the root surface, absorbs water and minerals from the soil, and protects the internal tissues.

The cortex occupies a big part of the root and its located under the epidermis. The most internal cell layer of the cortex is called endodermis.

The vascular cylinder is composed of vascular tissues -the xylem and the phloem- that is surrounded by one or more cell layers called pericycle. The xylem looks like a cross of big cells in the center, and the phloem occupies the spaces between the pericycle and the xylem.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )