Questions

Veins carries Blood back from the body parts to the Heart.

We know that The circulatory system of our body is a loop. The Heart is the pump, the arteries and their smaller branches (arterioles) carry oxygen rich blood all through your body and the veins and their smaller branches (venules) carry oxygen depleted blood and waste products back.

While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. Cellular respiration takes place in the mitochondria. They need mitochondria for this reason.
Hence with this logic, we can say that Plants cells have mitochondria.

Ctrl+Shift+F Opens the Font dialog box with the focus at the Font combo box.

Answer this question around the following steps :

1. Greet customer.

2. Tell your name to the customer.

3. Ask customer how you can be of any assistance to him/her.

4. Listen carefully and patiently to the customers query or requirement.

5. Provide the customer with the best solution or assistance without making him/her wait for long.

6. Inquire if customer is satisfied with the assistance or help provided.

7. Ask the customer if he needs any further assistance.

The statements true about viruses are :

1. The capsid enters the host cell if the virus is enveloped.

2. Enveloped viruses bud from the host cell. 

3. HIV contains reverse transcriptase.

4. A retrovirus contains RNA.

The nervous system of the human brain consists of the central nervous system which has brain and the spinal cord and the peripheral nervous system which has perpheral, cranary, spinal nerves.

Study of Life in outer space or search of life external to Earth is known as Exobiology.