Answer:
The correct answer is nucleus
Explanation:
DNA is made up of nucleotides, a deoxyribose sugar, and a phosphate group. There are four types of nucleotides which make the DNA that are adenine, guanine, cytosine, and thymine. DNA is formed inside the nucleus and after transcription, it forms RNA that moves out of the nucleus through the nuclear pore.
So if a plant cell containing radioactive nucleotides is grown in a test tube than after examination of cell the radioactivity will be concentrated in the nucleus because DNA is formed in the nucleus and nucleotide are its constituent.
Protons are positive and 1 atomic mass unit (or AMU), neutrons are neutral and 1 AMU, and electrons are negative and have no real weight.
Answer:
The tetrad occurs during the first phase of meiosis. It is the foursome of chromatids that forms when replicated homologous chromosomes align. It must be formed for crossing over to occur. It is broken apart when the homologous chromosomes separate in meiosis I.
Explanation: Hope this help (MARK BRAINLIEST)
Answer:
biology
Explanation:better to understand the cell structure before you test anything
<span>a. Cretaceous
</span>The continents began to drift apart by the end of the _______ period.
NOT:
b. Cambrian
c. Neogene
<span>d. Permian</span><span>
</span>
