Answer:
C. The results of the investigation led to new scientific questions
Explanation:
In science, hypotheses are created mainly to understand a certain phenomenon. This requires the generation of multiple questions to explore the topic thoroughly.
A scientist cannot explain a phenomenon with only one question or one set of experiments. In fact, <u>scientists need to design different experiments to manipulate different variable and determine which of those has a significant impact. Then, after the first question has been answered, </u><u>other questions are going to arise</u> and other experiments will need to be performed <u>to provide facts and evidence</u>. This is also how a theory is developed or proposed.
In this case, the scientist demonstrated that an increased temperature decreases the number of produced offspring in a certain species. Now, he/she wants to explore how this species will cope with the increased temperatures that climate change will bring. This new question will allow him/her to understand the behavioral or physiological plasticity the species has and whether it will be able to adapt to future environmental conditions.
Tectonic plates are massive slabs of rock generally composed of both continental and oceanic lithosphere <span />
Answer:
C
Explanation:
Blood contains red blood cells (erythrocytes) that do not contain nuclei and are biconcave to allow them to carry more oxygen for diffusion. Therefore the round disks with no nuclei are red blood cells.
The purple-colored spherical cells are probably blood platelets if they are small or they could be white blood cells (lymphocytes) if they are larger.
Answer:
Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells.
Explanation:
Answer:
DNA replication follows semi conservative mode of replication
Explanation:
The results of Meselson and Stahl's experiments can be explained by semi conservative mode of DNA replication. According to it, the two DNA strands separate and both are used for synthesis of new DNA strands such that the new DNA molecule has one parental and one new strand.
In the experiment, originally the medium was 15N so all the DNA molecules had 15N. Later the medium was changed to 14N. In first round of replication in new medium, the two 15N strands in a DNA molecule separated and formed new strands using 14N. So all the DNA molecules had one 15N and one 14N strand.
In the second round of replication, the 15N-14N hybrid DNA molecule separated again. Now, 15N gave rise to 14N strand and 14N strand also gave rise to 14N strand such that half of the DNA molecules were 15N-14N hybrids and half were 14N-14N. Hence, researchers concluded that DNA replicated according to semi conservative mode of replication.
