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exis [7]
3 years ago
15

!!!!!!H-E-L-P!!!!!!!!!! How do index fossils help scientists establish how old rocks and other fossils are? In your answer, incl

ude fossils in the same layer of rock, in a lower layer of rock, and in a higher layer of rock compared to an index fossil.
Biology
1 answer:
ratelena [41]3 years ago
3 0

Answer:

safari could help, learnt this a few years ago, totally forgot!!

Explanation:

:).

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Native bumblebees live in grasslands and consume pollen and nectar from flowers. The bumblebees carry pollen from one plant to a
Fynjy0 [20]

Answer:

i think it's A. why? because bumblebees pollinate flowers making more grow but dragonflies EAT the bees so they'll decrease.

4 0
3 years ago
Compare and contrast the extracellular matrix of animals and the cell wall of plants. Consider their functions and the types of
mario62 [17]

Answer:

The plant cell wall is strengthened by the molecular structure of cellulose. Cellulose is made up of ß-glucose arranged upside down, this arrangement aided hydrogen bonds between the hydrogen ions of the  hydroxyl group and oxygen of the of the ring   of same  betta -glucose.

The aggregation of the hydrogen  bonds give bundles of  strong tensile  strength of cellulose called the  microfibrils (of 60-70 celluose molecules).They are  held together in bundled called fibers.T<u>hese is the source of  plant cell walls  strength. </u>

<u />

Collagen is the main extracellur matrix (EM) in animal cells.It is a glycoprotein made up of 25%of body protein of animals.Each collagen molecule is made of helix shaped ,three polypeptide chains, wound around each other to form<u> triple helix.</u>The bonds  holding helix together are hydrogen and covalent bonds.

Each triple helix is attached to adjacent collagen molecule, parallel  to it. The covalent bonds formed a cross link which held  the collagen molecules together forming FIBRILS.  This gives flexibility to collagen, while maitaing strong tensile strength. This is what is responsible for the structural strength of cell membrane .

.The  EM,is  futher reinforced with  carbohydrate molecules(proteoglycans) which<u> aided in water movements by  osmosis following  sodium movements into the matrix.</u>

3 0
3 years ago
Non-living things, such as a car, often show characteristics similar to those of living organisms.
Alex

Answer:

Living and car both move, both release energy, both needs energy to move and both gets damages in accidents.

6 0
3 years ago
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of _________
Snowcat [4.5K]
The ecological relationship between termites and the wood-digesting protozoans that live in their gut is an example of  mutualism. Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
3 0
3 years ago
In a dihybid cross for round and yellow seeds (RrYyxRrYy) what is the probability of having green and wrinkled seeds
juin [17]

1/16

For a dihybrid cross, the ratio is 9:3:3:1, and green and wrinkled is the one so doing the math, that is 1/16

I hope this helps

5 0
3 years ago
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