Fuels are materials that react with other substances to release nulear or chemical energy as heat. Chemical fuels release energy via combustion. Nuclear fuels release energy by nuclear fission. Nuclear and chemical fuels are used for different purposes because of the complexity of deriving heat from them, the amount of heat generated and use in various applications.
It’s nitrogen! Hope this helps
Answer:
The ways in which teen pregnancy can be addressed are as follows:
1. Special prenatal care is needed and health care centres should be visited frequently for a checkup.
2. The teen should also undergo tests for STD or Sexually transmitted diseases.
3. Toxic substances such as alcohol, tobacco, etc. should be avoided.
4. Eat a proper balanced diet and stay physically active.
5. The teen should be made aware of all the associated health risks and other factors associated with pregnancy.
Explanation:
I'm not sure but hope it helps.
Answer:
The answer is D. Prokaryotes have one origin of replication but it proceeds in two directions.
Explanation:
DNA replication is a process in which in which one parental DNA strand acts as template to synthesize complementary daughter strand. There are specific sequences in DNA from where replication starts. These sequences are called origin of replication. In Eukaryotic cells due to large number of DNA many origins of replication are present. However, in prokaryotic DNA only one origin of replication is present that is bi-directional.
1. Bees pollinate flowers and flowers provide nectar for the bees. "M"
2. A tapeworm attaches to the intestines of animals and absorbs their nutrients. "P"
3.Tiny birds helping to keep a crocodile's mouth clean by eating scraps of
food caught between the crocodile's teeth. "M"
4. A tree frog using a plant for shelter from the rain. "C"
5. A tick feeding on the blood of a deer. "P"
Explanation:
Mutualism : If 2 or more species are having an association and the relation is useful to both the organisms in relation, is termed 'mutualism'.
eg: In pollination bees transfer pollens and help reproduce flowering plants and bees get nutrition from the nector.
The plover bird comes to crocodile's mouth as it gives invitation to it to cleanse its mouth and food stuck between the teeth because crocodile cannot go flossing. In turn plover birds gets its food. In this relation both bird and crocodile benefited.
Commensalism: This is a relation between two organisms or species in which one partner is benefited while other neither gets harmed nor benefited.
eg :A tree frog utilizes the shade of plants and hide in the plant to get saved from prey in turn plant does not get anything.
Parasitism: In this association parasite lives in the organism and benefits from it but host gets harmed with this association.
eg: The tapeworm living in intestine of animals attaches to draw nutrition in turn animal gets disease caused by it.
Tick receive nutrition and the deer gets the disease.
