Which is a correct statement concerning the insect circulatory system? Question 18 options: A) Blood transports oxygen and nutrients to all the tissues B) Blood is always contained in a system of tubes called tracheae C) The circulating fluid bathes tissues directly D) There is no heart, or pump

QUESTION 4: What are the characteristics of members of Phylum Chytrids? Please delineate how they are classified. How many classes do they have?

Two warm-blooded animals underwent surgery in the following places: a) in the first animal , in the ligation of the right bronchus and left pulmonary artery; b) in the second animal, in the ligation of the left bronchus and left pulmonary artery. Immediately after the operation, registration of the pneumogram began, but the first animal died very quickly, while the second animal didn’t . Questions: 1. Why did the first animal die? 2. Was there any Violation of any stages of breathing? 3. Describe and explain changes in external respiration in animals.

The circulatory system of the vertebrates is derived from    ?    of the Cnideria: a) ectoderm, b) the endoderm, c) heart, d) chloroplasts, e) the amoebocytes which occupy the space between the ectoderm and the endoderm.