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3 years ago

Before fossil fuel use became widespread, which of the following did people use for a. energy?

Biology

2 answers:

Alex777 [14]3 years ago

3 0

Answer: im not 100% but i think its E all

Explanation:

Ratling [72]3 years ago

3 0

Answer:

Explanation:

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Describe the relationship between cells and organisms

Elden [556K]

Cells are the basic unit of structure and function in organisms.
Needless to say, organisms can’t be a thing if cells didn’t exist.

7 0

3 years ago

What are some characteristics of the marine biome? Please help!

grigory [225]

Answer:

marine biome abiotic and biotic features. The abiotic features in the marine biome is the sunlight the water/ocean ,salinity, acidity, oxygen, light levels, depth, and temperature because its not living. some fects about the marine biome, Reef fish and coral off Eniwetok atoll in central Pacific.

Properties of Ocean Water. Ocean waters are salty and contain minerals and dissolved gases. They also have a high heat capacity and vary in density depending on temperature and salinity.

Explanation:

marine biome-The marine biome is an environment characterized by the presence of salt water. The marine biome is found in all of Earth's oceans and is the largest biome in the world. The marine biome is home to an amazing array of living organisms, from the enormous blue whale to microscopic cyanobacteria.

Here are just a few of the animals that you will find in the marine biome:

Fish - Sharks, swordfish, tuna, clown fish, grouper, stingray, flatfish, eels, rockfish, seahorse, sunfish mola, and gars.

Marine mammals - Blue whales, seals, walruses, dolphins, manatees, and otters.

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3 years ago

Which animal in a pond food chain would be on the same trophic level as a snake in a grassland ecosystem?

nirvana33 [79]

I think a raccoon because both are predators

3 0

3 years ago

Which effect does a gradual decrease in pH from 13 to 1 have on the action of amylase?

tatiyna

Answer:

A decrease in pH is too acidic compared to optimum pH for amylase activity. The hydrogen ion changes amylase sites of activity and amylase activity become low. At pH 13 to 1 which is acidic, reduces the activity of amylase because the hydrogen ion changes amylase activity sites and render it's action low which will denatures amylase and make it ineffective.

Explanation:

Amylase refer to enzymes that catalyses or breakdown starch into sugars. General, enzymes are biological substances that speed up the rate of chemical reactions.

Enzymes generally are affected by pH. The most favorable pH is the optimum pH which make amylase to be effective or enzymes.

A high pH or low pH has effect on the enzymes and will reduces enzymes activities. A low pH will cause the hydrogen ion to alter the enzymes sites and reduce their activities while high pH will cause the hydroxides ion to alter the enzymes activity sites.

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3 years ago

Identify the mitotic phases.

Anna11 [10]

Mitosis consists of four basic phases: prophase, metaphase, anaphase, and telophase. Some textbooks list five, breaking prophase into an early phase (called prophase) and a late phase (called prometaphase). These phases occur in strict sequential order, and cytokinesis - the process of dividing the cell contents to make two new cells - starts in anaphase or telophase.

I gave you a diagram to help put these words into an image.

I hope this helped!!! Have a wonderful day ! :))

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3 years ago