: II. Select the correct option from the list and fill in the blanks:
superior vena cava, erythrocytes, transpiration, AB, thrombocytes, sphincter, live
1. Platelets are also known as

2. The blood group
is a universal recipient.
3,
is the largest blood vessel in the body.
4. A ring of a muscle called
surrounds the top of the urethra.
5.
converts amino acids into ammonia and urea.
6.
helps plants in keeping cool during summers.​

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2