Biology tutor

Slipper ciliates: external and internal structure, nutrition, reproduction, significance in nature and human life

The class of Ciliates includes about 6 thousand species. These animals are the most highly organized among the protozoa. With morphological and...

3.5. Division Spermatophyta - seed plants

Spermatophyta (Greek sperma - seed) is the most prosperous group of land plants. In this section we will focus on those adaptive...

Endocrine glands

Endocrine glands include glands that do not have specialized excretory ducts and secrete their secretions directly into the blood....

General characteristics of seed plants

Seed plants are the currently dominant group in the plant kingdom. Their widespread distribution is associated with the emergence of the seed and...

GENERAL CHARACTERISTICS OF THE SPOROVA CLASS

Lesson 3 class Sporozoa - Sporozoa (Sporozoa) CLASS SPOROZOA Type: Protozoa (Protozoa) Class: Sporozoa Order:...

A population is... Characteristics and types of populations

The term “population” is used today in various fields and areas of science. It has the greatest influence in biology, demography, ecology,...

7 Cell - genetic unit of living things

Video lesson 1: Cell division. Mitosis Video Lesson 2: Meiosis. Phases of meiosis Lecture: A cell is a genetic unit of a living thing. Chromosomes, their structure (shape and...

Description of the glands of human external, internal and mixed secretion

Human organs that are designed to produce biologically active substances are called glands. They play a very important role in life...

Structure of the upper and lower respiratory tract in humans

The human respiratory system is a collection of organs necessary for proper breathing and gas exchange. It included...

Breathing is... Structure and functions of the respiratory organs

Respiration is the process of exchange of gases such as oxygen and carbon between the internal environment of a person and the outside world. Human breathing...