Question

a. Which is a shared ancestral character of birds?

hollow bones

reduction in the number of organs

fore-limbs modified into wings

feathers

b. Ectomycorrhizae differ from endomycorrhizae in that .

ectomycorrhizae form a sheathing structure that surround the plant's root.

ectomycorrhizae form structures called arbuscles.

ectomycorrhizae have modified hyphae called haustoria.

ectomycorrhizae have hyphae that are specialized to trap nematode worms.

c. What is a mushroom composed of?

coenocytic hyphae

heterokaryotic hyphae

mycelium

lignin

d. Spiders are _____.

ecdysozoans

insects

terrestrial crustaceans

trilobites

Answer 1

A .Forelimbs modified into wings is a shared ancestral character of bird

B. Ectomicorrhizae differ from endomicorrhizae is that ectomicorrhizae forms a sheathing structure that surrounds the plants roots.

C. Mushroom is composed of mycelium

Mycelium referred to as the vegetative part of the fungus.when suitable conditions occur the underground mycelium will produce mushroms,which is composed of hyphae.

D .Insects.

From these given options we can choose only insects. Spiders are arachnids,,but the option is not given in thje question.A number of differences isin between insects and arachnids.Insects have six legs but arachnids have eight,many insects have wings no arachnids have wings,insects have antennae but arachnids have pedipalps.