The correct answer is option D, It needs sunlight to survive.
Reason -
Phytoplanktons are the plant species of planktons and thus they need sunlight like all green plants to survive and produce food. The sun light is predominantly available at the ocean’s surface, thus the phytoplanktons occur near the surface of ocean. Along with sunglight , phytoplanktons also need water, nutrients and CO2 to grow which are readily available at the ocean’s surface.
Answer: The hemoglobin on red cells, uses iron to carry oxygen
Explanation:
It's often impossible to repeat trials on the same subjects. 2-Subjects may report an inaccurate medical history. 3-It can be difficult to control all possible variables. 4-It's impossible to come up with testable scientific questions for human subjects.
Answer:
b.Grow and change
c.Have a complex chemistry
d.Maintain homeostasis
Explanation:
