(D) Both perform photosynthesis is the observation that led researchers to propose that chloroplasts evolved from cyanobacteria.
Chloroplasts is the area where photosynthesis takes place. It is a green organelle in a plant cell. Pigments called the chloros in a chlorophyll are needed for the photosynthesis.
Cyanobacteria or blue-gree algae contains a blue photosynthetic pigment and a chlorophyll for photosynthesis.
Answer:
The correct answer is- b. P: coughing; C: saliva; B: complement system
Explanation:
Body show physical, chemical and immunological response against foreign antigen to protect the body from them. Coughing, sneezing, skin, respiratory tract, gastrointestinal tract comes under physical barrier. They restrict the bacteria to get into the body.
Chemical barrier includes saliva, tear, sweat, mucus that helps in killing the pathogen at the outer body surface. Antibodies, immune cells, complement system comes under immune response which helps in destroying the pathogen which are present in the body.
<u>Answer:</u>
<em>True
</em>
<u>Explanation:</u>
If we eat an hour before the exercise then our body gets enough energy to carry out the physical activities. Extending more than two hours of a meal before the exercise is not advisable.
Consuming carbohydrate and protein rich food after the exercise is a must as it stimulates the synthesis of muscle protein. Working out in an empty stomach or after a light meal is not suggested as the body burns more fat during the exercise even when enough food is not consumed.
Solid Liquid Gas or Plasma , a define shape would have to be the solid
Answer:
1. Covalent bonds occur between nonmetal and nonmetal.
2. In a neutralization reaction, the acid and base results in salt and water that are neutral in pH
3. C2H6 is ethane!
4. The correct name of CaO is oxocalcium
I'm glad to help, but please still try to use the naming rules!
Hope this helps :)