An insulating plate, such as plastic, tends to be positively charged when rubbed with cloth due to the piezoelectric effect. This phenomenon involves certain materials to generate charged particles as a response to mechanical stress applied to it. In this case, the mechanical stress was due to the rubbing motion.
Answer:
This symptom is seen in case of Cirrhosis disease.
Explanation:
Cirrhosis is also called as liver cirrhosis, a condition where liver dysfunction takes place due to excessive intake of alcohol.This is a long time process and the scar tissue takes the place of normal tissue present in the liver.
The susual symptoms include tiredness,weakness,itchy, swelling of legs, yellow skin, fluid buildup in the abdomen.
Other impotrtant factors that causes this disease are hepatitis B,hepatitis C, non alcoholic fatty acid liver disease etc.
This disease can be prevented by applying proper vaccine,antviral medications, steroid medication, ursodiol,liver transplant etc.
Answer:
Constant variables
Explanation:
Elaina's investigation lacked the critical ingredient of constant variables which are important components of every scientific investigation. In every research, there are 3 important variables, namely:
1. Dependent variables: the actual variable to be measured during the course of investigations and whose values are dependent on another variable (independent variable) supplied by the investigators.
2. Independent variable: one of the variables that are supplied by investigators whose values are often manipulated to see the kind of changes it will cause to the dependent variable.
3. Constant variables: other variables that are neither independent nor dependent but constant for all the various experimental groups in investigations.
Answer:
Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce.
= Fish
Explanation:
The best answer is D, birds.
For more information and details on the way a bird's respiratory system works:
https://asknature.org/strategy/air-flow-patterns-facilitate-efficient-gas-exchange/