Put the following words and word combinations into the gaps. Define the words using a dictionary

Define the words using a dictionary

To concern oneself with, to put forward, to be confined to, to encourage, grave, a realm, a challenge.

Continue the sentences

1. The issues of interest were…
2. Around the same time, the field was gradually…
3. Only later did it emerge that…
4. Through their efforts, recording by film was…
5. One of the pioneering theoretical efforts in understanding...
6. These developments were of obvious importance…
7. The early work in the area,…

Put the following words and word combinations into the gaps

pump / heart function / fractures / supplement / interaction / matter / put forward / confined

1. Nearly all members of this class that live in shallow waters harbor symbiotic algae, which ______________ the nutrition of their hosts through photosynthesis.

2. The ______________ of epinephrine with each type of receptor activates a different second-messenger system in the target cell.

3. For open and compound bone ______________, the injured bones can show through the skin because the jagged edges of the broken bones can destroy the covering muscles and tissues.

4. The purpose of the heart is to ______________ fresh blood to the organs and tissues of your body that need the oxygen and nutrients it carries.

5. The smallest stable particles of ______________ are protons, neutrons, and electrons, which associate to form atoms.

6. A variety of other ideas have been ______________ to establish criteria for defining species.

7. Photosynthetic organisms are ______________ to the upper few hundred meters of water.

8. Reduced ______________ is the condition when the heart doesn’t function properly.