Answer:
B. The light waves get "stretched out" as they travel.
C. The light waves appear redder than expected.
Explanation:
You might hear about doppler effect before. An ambulance siren will be heard differently when it coming to you and when it moves away. When moving away, the frequency of the sound will seem to keep getting lower to the observer. A lower frequency means the sound appear to have a longer wavelength.
When scientist examines the lightwave from the distant stars, they find that the light wavelength seems stretched out and then it should be. The light also seems redder than expected. Redder light means the wavelength is longer, so the object should move away from our observation point.
Answer:
The correct answer is option B, that is, phthalates.
Explanation:
A class of chemicals that are used to soften plastics like PVC, function as fixatives and solvents and bind fragrances in the products are known as phthalates. The human encountering with the chemicals can take place via:
1. Inhalation of fragrances or fumes from fixatives and solvents,
2. Chewing on a plastic toy by a child that develops small openings in the plastic, which provides a space for the chemical to get leached from the toy into the mouth of the child.
3. Through the absorption of perfumes, lotion, and deodorants.
The serious health effects of the chemicals comprise developmental and reproductive issues, hormone disruption, low sperm count, asthma, undescended testes, preterm birth, premature puberty, and development of certain kinds of cancers.
The specialized cells Cnidocytes<span>, the harpoon-like "nettle cells" that give the </span>phylum<span> Cnidaria its name, are used for protection against prey. </span>
Answer: The spellings are wrong. It should be globulin and heme.
Globulin alone is not effective as oxygen carrier because globulin does not have oxygen binding groupband cannot bind oxygen.
Heme alone is not effective as oxygen carrier because the iron present in heme can be oxidized easily and it cannot bind to oxygen.
Explanation:
Globulin are proteins that are present in the blood of humans. It is an oxygen carrier.
Heme is iron containining compound that form the non protein part of haemoglobin and other biological molecules. Heme are responsible for carrying oxygen in the blood.
I would say it deactivates, because enzymes are picky about the type of environment they are in and will only work if they have the right environment. Hope i help.
