I think it is b... because the ppl are dieing but the ppl being born are staiyin the same :)
In the circulatory system, nutrients such as amino acids and glucose are transported by the PLASMA.
The plasma is the liquid portion of the blood and one of its most important function is to transport materials such as glucose, amino acids, hormones, enzymes, water, etc.
Biogenous sediment is sediment created from the shells of organisms that were once alive. These shells contain substances such as calcium, silicon and phosphorus. However, these shells do not contain manganese. Therefore, the answer is A. manganese nodules.
The parents had two recessive traits for a bent thumb.
Electrons are transferred sequentially between the two photosystems w photosystem I acting to generate NADPH and photosystem II acting to generate ATP the pathway of electron flow starts at photosystem II which is homologous to the photosynthetic reaction center of R (Brainliest Answer Will be appreciated:D)