Answer:
B. D.
Explanation:
B. because the temperature changes and when it changes a chemical change because there is not heat or coldness to change it with physical change.
D. because you are mixing the colors so that the color of whatever substance you are changing the color of is changing what the specific color was before.
Hope this helps!!
Also hope you can understand it tell me if you cant!!
Answer:
Answer is colostrum.
Explanation:
Colostrum is the first secretion of mammary gland after giving birth. It builds a strong immune system for the baby because it is rich in antibodies.
The correct answer is C. (Ik it's correct because I just answered it)
PCR (polymerase chain reaction) is a relatively new advance (1980's) but it has a great impact in our lives. Specifically, in forensic science, PCR is useful in many sorts of crimes . Up until the PCR method, in order to identify a person forensic scientists would use fingerprints or some other ambiguous methods like teeth marks etc. But now, with PCR, we can compare the genetic material found on a crime scene and compare it with a suspect's genetic material, definitively concluding whether they are the same person or not. The way this works is that we collect a sample from the crime scene with DNA and then PCR amplifies the quantity of DNA in that sample. One of the apparent advantages of this method is that PCR works with even a very small sample, often not even a single cell is required. This makes crime scenes full of information. Hence, succinctly, PCR has helped modern forensic science in that:
1) its results are more definitve than traditional identification methods and subject to less ambiguity
2) it is relatively fast
3) new pieces of evidence can be of value (like some hair cells) and identify the crominal in cases that in older times would be impossible to solve.
sperm used in the male side of reproduction
