What is the predominant energy source at deep sea hydrothermal vents

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?