The flap of elastic cartilage that protects food from entering the larnyx is called the epiglottis.
Answer:
Explanation:
Both the B cell membranes and the cancer cells are composed largely of phospholipids. Explain how the polar parts of the phospholipids from one cell interact with the phospholipids from the other cell when the membranes are fused, and how the nonpolar parts of one-cell phospholipids interact with the phospholipids from the other cell.
The polar parts of the phospholipids (hydrophilic head) from one cell to the other dissolve in water when the membranes are fused, and form hydrogen bonds with water. The non-polar portions of the phospholipids (hydrophobic tail) from one cell to the next to prevent water. They build a lipid bilayer between the hydrophilic heads where the hydrophobic tails are in between.
The heads are exposed to water when this layer is formed, while the tails only communicate with other tails, not the water.
Answer:
B. Are the insect’s antennae longer than its head?
Explanation:
Dichotomous key refers to the tool or method which helps the scientist to identify organisms.
It uses a specific series of questions which help in segregation of organisms and ultimately help the scientist to identify the organism on the basis of the observations or properties share by the organism.
Example of a simple dichotomous key is shown below.
Similarly, insects can have antennae longer or shorter than their heads. Thus, the question "Are the insect’s antennae longer than its head?" would help in segregating insects based on their antennae length.
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Answer:
1. 1.26823082 mL
2. 0.5 g/mL
Explanation:
The density formula is:
1.
Rearrange the density formula for v,
<em>Multiply both sides by v.</em>
<em>Divide both sides by d.</em>
Volume is found by dividing mass by density. The mass is 20 grams and the density is 15.77 grams per milliliter.
Substitute the values into the formula.
Divide. Note the grams, g, will cancel.
2.
Use the density formula.
Density is found by dividing mass by volume. The mass is 10 grams and the volume is 20 milliliters.
Substitute the values into the formula.
Divide.
Answer:
Nuclear Localization Signal
Explanation:
If a protein that is assembled in the cytoplasm has to function or be localized to the nucleus, the type of additions to the carboxyterminal end or accessories for mitosis will serve no purpose if the protein cannot get in. For this reason, proteins that are made to be moved inside the nucleus must have a protein signal to enter.
The nucleus is the "brain" of the cell and it must control what leaves and enters. A protein signal allows the protein to enter inside the nuclear pore. Since the nucleus is restrictive on the components that are allowed to enter or not, this signal is critical.