Chemical factors: This is due to internal stimuli. Changes in the blood such as decrease in O2, increase in CO2 and decrease in PH cause impulse in the carotid artery which stimulates the respiratory centers in the medulla and cause breathing.
Mechanical factors: also called external stimuli. Compression of the fetal chest during delivery forces small amount of lung fluid out of the lungs. This increase in pressure in the chest draws air into the lungs.
I would describe it as a weird phenomenon were two different breads mated together take make that breed or just something happened to the lobster when it was forming NOT SAYING THIS IS RIGHT I GUESSED IM GOING TO 9th GRADE NEXT YEAR
Answer:
Controlled variables are variables that do not change, they stay constant throughout the experiment and are the same among each experimental group. So for this experiment, some controlled variables would be;
- Amount of sunlight
- Amount of water
- Time to grow
- Type of plant
- Soil to grow in
Answer:
The very bottom one
Explanation:
Thymine and Adenine always pair together while cytosine and guanine go together.
