A. Kidneys are the organs in the urinary system that produce urine after breaking it down from food.
Four times as much genetic material is present in a cell during prophase I compared to a cell that has competed meiosis II. Prophase I is a phase in the first stage of meiosis (meiosis I). During this phase, chromosomes become visible. cross-over occurs, the nucleolus disappears, the meiotic spindle forms and the nuclear envelope disappears. The genetic materials in prophase I divides into two at the end of meiosis I forming tow daughter cells, which then divides again into two at the end of meiosis II forming four daughter cells.
Question: A "mystery molecule" was isolated in a laboratory and scientists found that the molecule readily crossed artificial membranes. Which of the following molecules can be ruled out as the "mystery molecule?"
a) CO2
b) O2
c) Cl-
d) H2O.
Answer:
c) Cl-
Explanation:
Membranes are the bilayers of phospholipids. The core of the membranes is non-polar and hydrophobic in nature due to the presence of non-polar fatty acid tails of phospholipids. The non-polar core of the membranes does not allow the charged particles such as chloride ions and the other polar and large substances to move through the membrane. The observed molecule could easily cross the artificial membrane. This means that the molecule was not a charged particle such as chloride ions.
Prophase is a Triangular Square Telophase is a Circle with cylinders
The most likely answer is B because a trough is a long hollow vessel for holding liquids.
