How will the flow of energy be altered in an ecosystem if the producers go extinct?

How could one determine if two unidentified organisms share a common ancestor?

Neko [114]

Answer:

Evolutionists determine that two organisms have a common ancestor is by looking at fossil evidence in different rock layers using the law of Superposition (Oldest layers are on the bottom, newest are on the top) and compare the skulls or other bones to each other in order of oldest to newest (or newest to oldest). Another way to determine this is to examine the amount of DNA a certain species shares with another species. An example of this would be that Humans share roughly 90% of our DNA with chimpanzees or the other Great Apes.

Explanation:

DNA

They can look at the DNA it's the most common one.

There are 4 pieces of evolution and they are

Fossils , Geography , Embryos / DNA , Anatomy

Fossils: Physical remains of species , Determine age, location, environment

Deeper layers = older

Geography: Proves species share common ancestors, depending on where

they live

DNA: BEST evidence because it’s the MOST ACCURATE

Similarities in the early stages of development

Similarities in DNA

More similarities = closely related

More differences = not related

Anatomy: Compare body parts of different species to see how they evolved

3 different structures:

Homologous (same structure, different function)

Analogous (similar structure, different organisms)

Vestigial (body parts that no longer serve a purpose)

All of that are in evolution

Hope it helped! ( Gave u my biology notes :D)

4 0

3 years ago

At what phase does crossover occur in

vesna_86 [32]

Answer: crossing over happens in prophase 1.

Explanation: ( in Portuguese ) os cromossomas homólogos, na profase 1 da meiose, tocam-se, trocando informações sobre o ADN. A esse processo chama se crossing over.

8 0

3 years ago

Read 2 more answers

Under normal conditions, what would be the PRIMARY mechanism that his body would use to reduce the amount of PCO2 in the blood

sergeinik [125]

The pH of blood if pco2 drops to 35.0 mmHg is 7.459

The pH of the blood can be calculated using the Henderson- Hasselbalch equation, which explains the relationship between acid dissociation constant pKa and pH in biological and chemical systems.

pH = pK + log ( HCO3- / ( 0.03 * PCO2 ) )

pK is 6.1 for the bicarbonate buffer system.

HCO3- = 24mm

PCO2 = 35.0 mmhg

pH = 6.1 + log ( 24 / 0.03 * 35.0 )

= 6.1 + log ( 24 / 1.05 )

= 6.1 + log 22.8571

= 6.1 + 1.3590

= 7.459

Hence, the pH of blood is 7.459

Learn more about the pH of blood here brainly.com/question/3919636

#SPJ4

8 0

2 years ago

Renin is made by ________.

otez555 [7]

Answer:

granular cells of the juxtaglomerular apparatus

Explanation:

Renin or angiotensinogenase is a circulating enzyme released by granular cells of the juxtaglomerular apparatus of the kidney in response to a series of physiological stimuli and causes activation of the renin-angiotensin-aldosterone system.

Renin transforms angiotensinogen from the liver into angiotensin I, which is transformed into angiotensin II by the lungs.

7 0

3 years ago

41. What is upwelling in the ocean?

Lilit [14]

41.) A process in which deep, cold water, rises toward the surface
42.) Surface waters are replaced by cold, nutrient-rich water that “wells up” from below.
43.) Slightly salty, as is the mixture of river water and seawater in estuaries.
44.) Brackish water condition commonly occurs when fresh water meets seawater. In fact, the most extensive brackish water habitats worldwide are estuaries, where a river meets the sea.
45.) Sonar. Echo sounding is the key method scientists use to map the seafloor today.
46.) I'm not sure, I don't want to give you the wrong answer. Sorry.
47.) An opening in the sea floor out of which heated mineral-rich water flows.
48.) Also known as the foreshore and seashore maybe referred to as the littoral zone. This is the area that is above water at low tide and under water at high tide (otherwise, the area between tide marks).
49.) A harsh and unforgiving habitat, subject to the rigors of both the sea and the land.
50.) Typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 200 meters (656 feet), seaward from the coast to the open ocean.

6 0

3 years ago