The structure in cell concerned with the synthesis of proteins is the

A. endoplasm reticulum

B. ribosome

C. nucleus

D. plasma membrane

E. golgi apparatus

Which of the following is an abiotic factor in an ecosystem?

A. Food

B. Host

C. Parasite

D. Predator

E. Pressure

Exoskeleton is a characteristic feature of

A. amoeba

B. earthworm

C. hydra

D. millipede

E. tapeworm

The type of placentation found in tomato fruit is called

A. axile

B. bisal

C. free central

D. marginal

E. parietal

The male reproductive part of a flower is made up of

A. anther and filament

B. ovary and ovule

C. ovule and style

D. stigma and filament

E. style and stigma

Which of these is a simple dehiscent fruit?

A. Achene

B. Cypsela

C. Legume

D. Nut

E. Samara

Which of the following processes converts nitrates in the soil to atmospheric nitrogen?

A. Denitrification

B. Lightning

C. Nitrification

D. Putrefaction

E. Rainfall

The part of the male reproductive organ where sperm cells are produced is called

A. epididymis

B. penis

C. seminal vesicle

D. seminiferous tubules

E. vas deferens

Mycelium is a feature of

A. algae

B. bacteria

C. ferns

D. fungi

E. viruses.

Which of the following body characteristics distinguishes Ascaris from Earthworms?

A. Bilaterally symmetrical

B. Cylindrical

C. Segmented

D. Soft

E. Unsegmented