D Mountain hope this helps
The correct answer is option C. Endocrine glands secrete hormones into the bloodstream because endocrine glands are ductless and the exocrine glands have ducts so they secrete their hormones into the ducts.
This has to do with SURFACE TO VOLUME RATIO. For a typical small cell, its surface area to the volume ratio get smaller as the cell grows. This implies that, if the cell grows beyond a certain limit, then the amount of nutrients that entered the cell will be limited, that is , nutrients will not be able to migrate into the cell as needed. To avoid this, the cell has to divide to reduce its surface to volume ratio.<span />
Answer:
Keystone Species: Kangaroo Rat Keystone species are species whose presence and role within an ecosystem has a disproportionate effect on other organisms within the system. Hawk (predator)/lizard (prey). scorpion (predator)/insect (prey). if their is no relationship between these two then the scorpions will die off and the insects will thrive.
Explanation:
Please check out my question
