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Basile [38]
3 years ago
13

These are complex proteins that speed up chemical reactions by lowering the amount of energy needed to get the reaction started.

Biology
2 answers:
Vilka [71]3 years ago
7 0
Enzymes.
They lower the activation energy (amount needed to start a reaction) and increases the reaction rate.
Naddika [18.5K]3 years ago
7 0

If you are doing USA test prep, then here is the answer key to all of the questions. Please leave a thanks if this helped you at all.

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Answer:

A basic and a non-invasive test done in pregnancies during the course of 28 weeks of gestation is termed as a fetal non-stress test. It is termed non-stress as no stress is imparted on the fetus while performing the examination. The main objective of the test is to determine the fetus's heart rate at the time of its movement.  

In the test, it can be seen that the heart rate of the fetus gets increased each time it moves, which shows that the baby is healthy as the heart rate goes up when it moves and goes down during its resting stage. The principle behind the test is that for proper well-being of the fetus, sufficient oxygen is needed and heart rate should come in normal ranges.  

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3 years ago
4b. why would the vena cava be classified as a vein? all veins carry blood back to the heart, except for the pulmonary vein. the
padilas [110]
The answer is that <span>all veins carry blood back to the heart, except for the pulmonary vein. the vena cava empty into the right side of the heart, so they technically bring blood to the </span>main atrium.
3 0
3 years ago
How do the different levels of body organization work together so your body can function?
prisoha [69]

Answer: The human body is organized at different levels, starting with the cell. Cells are organized into tissues, and tissues form organs. Organs are organized into organ systems such as the skeletal and muscular systems

Explanation:

6 0
4 years ago
Chemical process of breaking large molecules in food into smaller molecules
Goryan [66]

Answer:

digestion

Explanation:

breaking down of food particles into smaller substance is known as digestion.

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