Answer:
oxygen enters blood cells by 'diffusion'
It is b. If I am wrong I am sorry
Answer:
The endocrine system is a chemical messaging network. Endocrine glands secrete hormones, which are carried by the circulatory system throughout the body. The primary endocrine glands are the pituitary, hypothalamus, pineal gland, thyroid, parathyroid, adrenal, pancreas, ovary, and testis. Hormones maintain homeostasis in the body.
Explanation:
Hope this helps!
<span>They do not possess any skeleton at al</span>
The genotypic ratio of their offspring is 100% Ee.
Hope this helps! God bless
-vf
