Topics in BiologyTropical savanna explained with its characteristics Ecological pyramid explained with its importance and limitations Hindbrain: Medulla Oblongata and its features Food web explained with examples Biology Scheme of Work, SS1, First Term Biology Scheme of Work, SS1, 2nd Term Biology Scheme of Work, SS1, 3rd Term Male accessory sex organs: Seminal vesicles and bulbourethral glands Scrotum and its contents: Testicles Brain: Introduction to the human brain Forebrain: Lobes of the cerebrum and their functions Cerebellum: Parts and functions of the cerebellum Midbrain: Division and functions of the midbrain Negative feedback mechanism in homeostasis Arterial disorders explained with their causes Types of desert and their characteristics Characteristics of tropical rainforest Swamp forest: What are swamp forests? Characteristics of swamp forests Savanna biome: Concept of the savanna
Academic Questions in Biology
In a food chain, the primary consumers are classified under trophic level _____.
Cold blooded animals are referred to as _____.
F. None of the above
All reptiles are vertebrates.
_____ cells are responsible for the formation of osteoblasts.
_____ is a bone that constitute the axial skeleton.
Which of the following is false concerning cartilages and bones?
A diagram showing the movement of energy through a food chain is called a _____.
Which of the following is NOT a part of the wrist bones (or carpal bones)?
Deserts are generally classified into 2 types. These are:
With regards to the hotness or coldness of a desert, we can further classify them into 4 types. These are:
Cold winter or semi-arid deserts
Below are explanations on the aformentioned types of desert.
Hot deserts are located on the western coast of continents within latitudes 15o north and 30o south of the equator.
The subtropical deserts are categorized as hot deserts. In short, they are the hottest deserts in the world. (Subtropical deserts will be explained in the latter part of this article).
Note: Xerophytes are defined as drought resistant plants. They are found in hot deserts are able to survive through special adaptive features found on them. Examples of xerophytes are cactus, wiring grasses, thorn bushes and acacia.
Hot deserts show the following characteristics or features:
Cold deserts are found in the interior of continents around 45o north and 60o south of the equator.
The cold winter deserts and polar deserts are classified as cold deserts. (Both will be explained in the latter part of this article).
It is worthy of note to state that cold deserts may not remain cold throughout the year. However, during the winter periods, they show extreme coldness in their temperatures. They can also act as a functioning ecosystem for organisms like the polar bear and fishes.
Transpiration in plants is defined as a process through which water is lost from the aerial parts of a plant; especially through the stomata present in the plant's leaf.
Water may also be lost from the plant's stem and flowers during transpiration.
They are the hottest deserts in our world. They are very hot and dry in the summer but can be a little cooler during winter. Their soils are typically sandy in nature but can also be rocky in some instances.
Note: The subtropical desert have been reported to be so hot to an extent that rainfall evaporates from the atmosphere even before they hit the ground.
Examples of subtropical deserts include the followings:
Sahara desert in North Africa
Kalahari desert in South Africa
Chihuahua desert in USA
Mojave desert in USA
Great sandy desert in Australia
Sonoran desert in USA.
The plants (xerophytes) and animals found in subtropical deserts include cactus plants, snakes and a variety of insects. They are usually more active at night.
Coastal deserts are present around the earth's coastal regions between 20o to 30o latitude of the equator. They typically have a long warm summer and a short cool winter.
Examples of coastal deserts are the Atacama desert in Chile and Namib desert in Namibia.
Cold winter deserts are also called the semi-arid deserts. As the name implies, they are characterized with a cold winter and dry summers. They also have a very low annual rainfall and snowfall. This lack of rainfall in cold winter deserts is caused by a phenomenon termed the rainshadow effect.
Think of a rainshadow effect as a process whereby moisture is prevented from reaching an area as a result of high mountains present around such area.
Examples of cold winter deserts include the Gobi desert in Mongolia and Red desert in USA.
Polar deserts are found in the arctic and antarctica regions of earth. They have a characteristic cold temperature throughout the year.
An example of a polar desert is the antarctica.
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Amazing facts in Biology
99% of a panda's diet is bamboo. They may eat fish or other small animals occasionally
When attacked by insects, lima beans plant will often command parasitic wasps to their defence.
When the leaves of the lima bean's leaves are eaten by insects, the plant gives off a substance that signals parasitic wasps to swam in, destroying its enemies (the leaf-eating insects) in the process
Frogs drink water through their skin
Armadillos are western mammals known for their unique armor-like shell which are bulletproof
Although zebras are known for their characteristics black and white stripes, we still have some polka-dotted zebras
Charles Darwin is a British naturalist and biologist who contributed greatly into the study of evolution. According to research, he frequently ate the animals he studied
Lungs are the only human organ that can float on water
Unlike most snakes that lay eggs, anacondas give birth to live babies
A shrimp's heart is in its head
Women have more pain receptors than men
NOTABLE POINTS IN Biology
For a thing to be considered living, it must possess all the basic characteristics of life. These include:
Irritability or Sensitivity
During strenuous exercises like sprinting or running, your body may actually work in the shortage of oxygen. During this time, your body owes oxygen (called oxygen debt) and it must be replenished or repayed after the exercise is stopped. This is why you breathe excess of oxygen after you stopped the exercise.
This is the concept of anaerobic respiration
A food chain is a diagram that shows the relationship between plants and animals within a habitat on the basis of how they rely on each other for food.
Note: Habitat is a place where an organism live. It is of three types:
The term Biology originated from two Greek words. They are:
Bios: means life.
Logos: means knowledge or to study.
Biology can therefore be defined as the study of life
Anything that has life is generally considered as a living organism (or organism). All living organisms must be able to carry the following activities:
Irritability or Sensitivity
The above listed points are often regarded as the basic characteristics of life. You can memorize them using the acronym -> MR. NIGER DAC.
The gas used in the manufacture of food by plants is Carbon dioxide or Carbon(IV)oxide or CO2
Plants manufacture food through a process called photosynthesis.
It is noteworthy to state that plants are the only orgnisms that take away CO2 from the atmosphere