Answer:
Ever since the existence of life of humans on Earth, the humans have been making progress to understand themselves and the mother nature.
In the start, the humans were hunter- gatherers. Hunter- gatherers can be described as humans which use wild life plants and animals for food. The humans used to live in jungles and eat the wild- life plants and animals. They used leaves from the trees to cover their bodies. Heat was produced by rubbing the rocks.
After this time, the humans learned the techniques of cultivating plants for food. They started cultivating crops and depend on them for living. During this time, humans learned the art of farming and agriculture. But they couldn't understand the effects of various pathogens infecting the crops and humans at that time.
After this time, humans learned the art of preserving foods in different forms like pickles etc. They also learned that certain types of plants could be used to treat wounds and other diseases.
With the passage of time, people learned to make and use machinery for making their tasks easier. The usage of machinery progressed rapidly and the industrial revolution began. People became more diverted to this sector rather than farming. They started to move towards the cities to find better jobs in industries.
Life after industrial revolution was much easier as humans had made a lot of equipments which aid them to have a better life style. Science has been developing since that time day by day.
Explanation:
<span>The theory puts forward the concept that chloroplasts were developed from one form of prokaryotic organisms taken up inside a primordial eukaryotic cell. This is an organism form that uses light energy to divide, this part of its processes became the chloropplast whilst another formed the origin of mitochondria.</span>
Answer:
The term that describes that individuals understand themselves as being either male or female is called <u><em>gender identity </em></u>while the understanding that maleness and femaleness are biological and cannot change is <u><em>gender constancy</em></u>.
Explanation:
Gender identity can be described as a personal perception of considering oneself as a male or female ( or both or none). It is a realization that which characteristics you possess and according to these characteristics or traits, you will fit into which sex.
Gender constancy can be described as the understanding that the biological sexes are fixed and permanent. It is a realization that changes in the gender cannot occur even if an individual changes his appearance or traits.
An organ is a group of tissues working together to perform specific functions. An example of an organ is the heart.
