Answer: A
Explanation: There is no need to conduct and experiment if you already know the answer
1) D chromosomes
2) B a double helix
3)A chromosomes are made of DNA
4)A genes
The nucleotides in DNA contain four different bases, those of which being nitrogenous bases.
The four bases are:
1 - Thymine
2 - Cytosine
3 - Adenine
4 - Guanine
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Answer:
The sodium–potassium pump is found in many cell (plasma) membranes. Powered by ATP, the pump moves sodium and potassium ions in opposite directions, each against its concentration gradient. In a single cycle of the pump, three sodium ions are extruded from and two potassium ions are imported into the cell.
Explanation:
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Answer:
Mosses and liverworts are lumped together as bryophytes, plants lacking true vascular tissues, and sharing a number of other primitive traits.
Their flagellated sperm must swim through water to reach the egg. So mosses and liverworts are restricted to moist habitats.
Explanation:
