Answer:
I) Sexual reproduction
II) Mutation
Explanation:
Variations refer to the difference observed within organisms of the same species. Variation are introduced into a population by:
- new genetic combinations that occur during sexual reproduction (i.e during meiosis)
- mutations, spontaneous changes that occur in genes and chromosomes.
The flow of energy moves through living organisms via the food chain. A food chain is a diagram which shows how every living thing gets energy to live. Plants use the sun, nutrients in the soil and water to generate energy. Herbivores eat the plants to generate energy to survive. Carnivores eat the herbivores to generate energy.
<span>Matter moves through the biosphere by being cycled through various organic and inorganic stages. They are neither created nor destroyed. The biosphere is known as a closed system so no elements can escape. They are continually being recycled. </span>
Plastic bag.cane. cover is very useful for human. plastic mainly environment pollution . it's not used soil digestive . plastic mostly problem environment
<span>Carry information about the world to our brain where it is processed & Analyzed
1. Reception: absorption of physical
energy (wavelengths)
2. Transduction: Converting physical energy into electrical/ chemical neural pattern</span>
Began in the water
first evolved around 3500 million years ago
began as single celled organisms
