Each ring marks an entire cycle of seasons, or one year, within the tree's life. Hence 23 rings shows 23 years of trees life . Measurement of tree rings are based on Radiocarbon dating. These rings can tell us how old the tree is, and what the weather was like during each year of the tree's life. The light-colored rings represent wood that grew in the spring and early summer, while the dark rings represent wood that grew in the late summer and fall.
Rings of trees growing in temperate climates can indeed tell their age through their annual rings and also help determine the age of wood used to construct buildings or wooden objects.
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After the completion of first trimester that is 8 weeks of conception, the baby is almost 1 inch grown. At this stage, the baby is referred as fetus. At this stage, all the organs as well as limbs becomes visible except for the sex organs.
The heart of baby beats rhythmically. Eyes and the eyelids are completely visible. Both the forelimbs and the hind limbs are formed, and fingers buds are also visible.
At this stage, the fetus looks like a human. The umbilical cord is also clearly visible at this stage.
Hence, the correct answer is 8th week.
That is called uric acid and it helps them maintain internal homeostasis in hot climates by retaining water
Answer: The DNA of the organism in that area.
Explanation:
Phosphate is found in the DNA of the organism. If the food is contaminated with the radioactive phosphate then it can be examined by the DNA of the organism that had food contaminated with phosphate.
The DNA of the organism consists of the nitrogenous bases, ribose sugar and phosphate.
The traced amount of phosphate can be found in it only.
The given question is incomplete as it lacks the group of statements require to answer from, however, the correct group of statements is as follows:
A. She should use scientific investigation because she will need to analyze the results.
B. She should use technological design because she will need to design an experiment.
C. She should use scientific investigation because she will need to communicate her findings.
D. She should use technological design because she will need to build a prototype.
Answer:
The correct answer would be - option D. She should use technological design because she will need to build a prototype.
Explanation:
Rachel wants to develop a remote-operated lamp that can work by controlling by remote for that she needs to make a prototype to understand the technology and technical aspect of the product she wanted to develop.
Prototypes are technical designs or pictures that help in understanding the problems earlier about the product and can be solved by avoiding such issues in early models or protoptypes.
