Biology

A shoot is the above-ground vegetative part of a plant. It consists of an axial part - a stem on which leaves and buds are located. On some...

According to the latest scientific data, the ancestors of modern fish - jawless animals that resemble them in appearance - lived already in the early Cambrian,...

Current page: 16 (the book has 26 pages in total) [available reading passage: 18 pages]§ 57. The struggle for existence and its forms1. What...

The bryophyte department is a higher spore plant, the species diversity of which reaches 20 thousand. The study of mosses has been carried out for many centuries, scientists...

1. Note the forms of higher nervous activity common to humans and animals (see §60). 2. Ivan Petrovich Pavlov all objects and phenomena of the external...

Biosphere is a global ecosystem. The doctrine of V.I. Vernadsky about the biosphere. 1. Give definitions of concepts. The biosphere is the shell of the Earth inhabited...

The brain is the main organ of a person, controlling all his life functions, determining his personality, behavior and consciousness. His...

What is the significance of roots in the life of a plant?What is the significance of roots in the life of a plant? What functions do leaves perform? What functions do...

Our nervous system is a complex mechanism of interaction between neurons that send impulses to the brain, and it, in turn, controls everything...

The cat was domesticated approximately 9.5 centuries ago in the Middle East. In Ancient Egypt, the cat was identified with Bastet, the goddess of the sun and...