Which of the following characteristics below belong to a clam?
a)dimorphic
b radula
c) closed circulatory system
d) shell teeth
e) pen
f) a and b only
g) a and c only
h) b and c only
i) b and d only
j) c and e only
k) b, c, and d
l) c, d, and e

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

Which could be a pathway of food through an ecosystem

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.