Explanation:
deoxyribonucleic acid (DNA)
1. True. Establishing more sites for the protection of biodiversity across the world can go a long way and would have a chain reaction in the ecosystem. Thus, it will save a lot of our planet's biodiversity. 2. a. -Philiab. -trophicc. eco-d. eu-3. A habitat is where certain species, animals, or organisms naturally live, feed, reproduce, etc. Examples: ocean, rainforest, deserts. An ecosystem has two components: living and non-living organisms which interact with each other to maintain homeostasis. The primary difference between the two is the presence of interaction between the things in the environment.4. Energy5. Producers6. Sun7. (No choices provided) One of the top factors that threaten the survival of species is caused by humans, man-made phenomena. 8. Answer: Polar bears. Polar bears are endangered species and there are only approximately 20,000-30,000 polar bears left in the world. Their population had been decreasing due to habitat loss because of climate change. 9. Scientists based the background extinction rate on the number of known species that went extinct over a period of time in the past. They also based it on archaeological evidence of species that existed and went extinct years ago.
1. A minute cylindrical organelle near the nucleus in animal cells, occurring in pairs and involved in the development of spindle fibers in cell division.
2. Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope.
3. Centrioles play a role in organizing microtubules that serve as the cell’s skeletal system.
4. They help determine the locations of the nucleus and other organelles within the cell.
The complete phenotype of an organism is dependent on : genotype , penetrance , expressivity and polygenes
<span>True.
The scientific consensus is that global surface temperatures have increased in recent decades and that this has been predominantly anthropogenic (caused by humans) through the emissions of greenhouse gases.
"No scientific body of national or international standing disagrees with this view." (Oreskes, 2007)</span>