In a chemical reaction, water decomposes to form hydrogen and oxygen. What is the correct term for the water? A. an element B. an atom C. a product D. a reactant

Answers

Answer 1
Answer: 2 H_2O -->2 H_2 + O_2
D. reactant, because H₂O is a product and O₂ , H₂ are substrates.

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Scientists believe that ancient ancestors of all animals were.A. Single-celled prokaryotes that reproduced asexually B. Single-celled eukaryotes that sometimes grew in colonies C. Multi-cellular organisms that were probably autotrophic. D. Multi-cellular organisms with an alternation of generations lifecycle.

Many countries use DDT to control the spread of deadly __________.

Answers

DDT is used to repel and kill disease carrying mosquitos 

Please help to explain why pine trees have needles instead of leaves and cacti have spines instead of leaves.If possible please relate these adaptations to their habitats.

And if you want to be FABULOUS....then evaluate the pro’s and opinion, justifying your ideas of the following: Pine trees are forested as a constructional timber.

Thank you for any ideas contributed, it is very much appreciated! :3 ♥ 12 Points+Brainliest for the best answer

Answers

developed a way to protect their foliage. Instead of flat leaves, pine trees have needles. These needles are the key to the Winter survival of the pine treeNeedles cut evaporation sotrees can save water!
Cacti have sines instead of leaves because they help protect them from getting eaten and they don't need leaves because they store water inside themselves. 
They both have adapteations to help them servive in very harsh conditions. Cacti use their adaptations to survive in scourching heat and pine trees can servive in freezing cold.

Which of the following is not a form of forced migration?a. fear of imprisonment and death.
b. home destroyed by floods or hurricanes
c. food shortage
d. chance for better wages.

Answers

the answer to the question is d

The obvious answer is B. Nature is one element that is not manipulated by man's choices.

What characteristic do all algae share?

Answers

Algea shares that they  are autotrophs.

Which type of mutation occurs in reproductive cells and can be passed to offspring:?A.somatic mutationB.germline mutationC.point mutationD.frameshift mutation

Answers

The answer is B. germline mutation. 


The germline mutation is heritable variation in the lineage of reproductive (germ) cells. Germ cells are cells that give rise to the gametes, so a mutation in germ cell will be seen in a sperm cell or egg cell but not in a skin cell, for example.


The point mutation is the changes in a single nucleotide base on the DNA molecule.

Frameshift mutation, due to addition or deletion of a base, results in the change of reading frame and totally different translation

Somatic mutation is mutation in a somatic cells and is not passed on to the next generation. 

its b. super late xD

Select all that apply.Which fungi are used in medicine?

yeast
penicillium
aspergillus
Rhizopus stolonifera

Answers

The correct answer is:

Penicillium

Aspergillus

The lesson states:

If you've ever heard of or taken penicillin to fight off an infection, you can thank a member of the imperfect fungi called penicillium. Some mold species of penicillium are also important in the flavoring and aging of cheese. Roquefort and Camembert cheese owe their distinctive flavors to these fungi. Aspergillus is an imperfect fungus that is found on decaying food. It also contributes to the production of organic acids like citric acid. Both penicillium and aspergillus produce enzymes that are purified and used in various industrial compounds and in medicine.