Brainliest In order to provide nutritional information about food, scientists must evaluate how many calories a given food has per serving.

Given what you know about chemical and thermal energy, which is the best procedure for a scientist to use to determine how many calories are in a certain food?

Burn the food and determine the change in temperature from the beginning to the end.
Dissolve the food in water and determine how it changes the boiling point of the water.
Burn the food and determine how much it raises the temperature of a known amount of water.
Dissolve the food in water and determine if it changes the standing temperature of the water.

idk

explanation:

the answer to the blank provided is “an autosomal gene that is required for the expression of genes on the x chromosome”.

testis-determining factor, abbreviated as td, which is more popularly known as sex-determining region y or sry protein, is a dna-binding protein or  gene-regulatory protein/transcription factor, encoded by the  sry gene. it is the gene responsible for the initiation of male gender determination in humans.

the answer is: the „power stroke“ step.

muscle contraction can be divided into a few steps:

1. the release of ach (acetylcholine) in the synaptic cleft, binding of ach for its receptor and consequently opening of the ca channels.

2. the release of ca, binding of ca for the troponin

3. troponin shifting the tropomyosin, which was blocking the active site on the actin

4. myosin heads attaching to actin by breaking down atp to adp+ pi

5.   formation of the ‘cross-bridge’ on the active site of the actin filament by myosin head

6. “power stroke” -the cross bridge pulls actin, which slides over the myosin

9.     7. the release of adp completes the cross-bridge movement and atp attaches to myosin, breaking the actin-myosin cross bridge.