Answer:
Energy Flow in Ecosystems. Ecosystems maintain themselves by cycling energy and nutrients obtained from external sources. ... The low rate of energy transfer between trophic levels makes decomposers generally more important than producers in terms of energy flow.
Explanation:
False. Respiration is providing oxygen for the cells and getting rid of the carbon dioxide, while digestion is transforming food into usable energy.
Answer:
Yes. You did it correctly.
Explanation:
The punnet square should be completed as follows:
T T
t Tt Tt
t Tt Tt
As the question says that the pollen carries the recessive alleles, hence the pollen should be carrying the alleles tt.
The question also says that all the offsprings produced are tall. Hence, the recessive male has to breed with a homozygous dominant female to get these results. The offsprings produced will be heterozygous dominant in this case.
<h2>Answer:</h2>
It is the type of coordination present between the cells or different organs within the body of multicellular organisms. ... In this kind of coordination a group of cells releases specific chemicals, which regulates the activities of other cell of the body.
<h3>#CarryOnLearning</h3>
Endocytosis is the process by which cells internalize substances from their external environment. It is how cells get the nutrients they need to grow and develop. Substances internalized by endocytosis include fluids, electrolytes, proteins, and other macromolecules. Endocytosis is also one of the means by which white blood cells of the immune system capture and destroy potential pathogens including bacteria and protists. The process of endocytosis can be summarized in three basic steps.
The Basic Steps of Endocytosis
The plasma membrane folds inward (invaginates) forming a cavity that fills with extracellular fluid, dissolved molecules, food particles, foreign matter, pathogens, or other substances.
The plasma membrane folds back on itself until the ends of the in-folded membrane meet. This traps the fluid inside the vesicle. In some cells, long channels also form extending from the membrane deep into the cytoplasm.
The vesicle is pinched off from the membrane as the ends of the in-folded membrane fuse together. The internalized vesicle is then processed by the cell.
There are three primary types of endocytosis: phagocytosis, pinocytosis, and receptor-mediated endocytosis. Phagocytosis is also called "cell eating" and involves the intake of solid material or food particles. Pinocytosis, also called "cell drinking", involves the intake of molecules dissolved in fluid. Receptor-mediated endocytosis involves the intake of molecules based upon their interaction with receptors on a cell's surface.
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