Genes are the proof of evolution and show that we are related to another species that existed long ago. So that means we all share some of the same genes.
Some electromagnetic waves have a long wavelength (radio and microwaves) but other have a smaller wavelength (xrays and gamma rays) and therefore it can penetrate your skin and cells and destroy/mutate then which can cause cancer.
b. proteins provide most of the body's material for building and repairing cells~
Answer:
During the course of a continuous isometric contraction of given strength, the electrical activity progressively increases. This is due to recruitment of motor units taking place to compensate the decrease in force of contraction occurring in the fatigued muscle fibres.
Explanation:
Answer:
Negative effects: Cutting down trees and littering have a negative effect on animals and plants.
Positive effects: Protecting endangered species and cleaning lakes and seas
Explanation:
Ecosystem science is the study of interrelationships among living organisms, biochemical processes, and human activities in ecological communities.
Two human activities which affect the ecosystem negatively:
1. Cutting down trees
2. littering harm animals and plants.
Two human activities which affect the ecosystem positively
1. Protecting endangered species
2. cleaning lakes and seas
