B. The cell contains a nucleus.
C. The cell uses ribosomes to create protein.
D. The cell contains DNA
The crucial feature that proves a cell is eukaryotic is the presence of a nucleus, as this is the fundamental characteristic that differentiates eukaryotic cells from prokaryotic ones.
In biology, the quintessential feature that distinguishes eukaryotic cells from prokaryotic cells is the presence of a nucleus. So, we can conclude that the observation which proves that a cell is a eukaryote is B. The cell contains a nucleus. Eukaryotic cells are equipped with a true nucleus, which houses the cell's DNA. Other features such as a cell membrane, ribosomes, or the existence of DNA could be attributed to both eukaryotic and prokaryotic cells, hence they are not unique identifiers for eukaryotes.
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Answer:
o%
Explanation:
If white and red roses are incompletely dominant, the phenotypes are as following:
AA - red roses
AB - pink roses
BB - white roses
So, a cross between a red (AA) and a pink rose (AB) will result in only red or pink roses:
Parents: AA x AB
Offspring: AA AA AB AB
The plasma membrane has a double layer of phospholipids with proteins dispersed throughout these layers. These proteins perform several functions, including molecule transport, enzymatic functions, and signal transduction pathways.
The plasma membrane of cells has a structure commonly referred to as a lipid bilayer. This bilayer consists of two layers of phospholipids. Each layer with one hydrophobic (water-fearing) end and one hydrophilic (water-loving) end. These form a double layer as the hydrophobic ends of each layer face towards each other, while the hydrophilic ends face outwards towards the aqueous environments inside and outside the cell. Proteins are dispersed throughout this lipid bilayer. These proteins serve various functions such as acting as channels or carriers for the transportation of molecules across the membrane, acting as enzymes, or functioning in signal transduction pathways or cell adhesion.
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