How many membranes does the mitochondria have?
a. 1
b. 2
c. 3
d. 4

b. 2

Explanation:

The mitochondria has 2 membranes namely the outer membrane and the inner membrane , which are separated by an inter membrane space. The outer membrane is selectively permeable to ions and molecules and also holds the whole mitochondria structure .in contrast ,the inner membrane is less permeable and  it is where electron transport occurs , between  protein complexes found within the structure.

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.

i believe it would be c: tons.