Answer: The nucleolus works to transcribe ribosomal RNA (RNA) and it forms incomplete ribosomes by combining proteins and RNA. Other functions of this structure include transporting molecules, vital substances and ions to ensure efficient cell metabolism.
Explanation:
The nucleolus is the largest structure in the nucleus of eukaryotic cells, where it primarily serves as the site of ribosome synthesis and assembly. Nucleoli also have other important functions like assembly of signal recognition particles and playing a role in the cell's response to stress. Nucleoli are made of proteins and RNA and form around specific chromosomal regions.
Answer:
Dendrochronologists have shown that tree-ring data produce a remarkably accurate history of droughts and other climate changes.
Explanation:
The underlying patterns of wide or narrow rings record the year-to-year fluctuations in the growth of trees. The patterns, therefore, often contain a weather history at the location the tree grew, in addition to its age. In dry environments, such as the Middle East or U.S. Southwest, tree rings typically record wet or dry years, and in cooler areas (high latitudes or high elevation), the ring widths are often a proxy for temperature.
Answer:
can I have the answer choices?
Open because there is an open cavity called a hemocoel.