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mamaluj [8]
3 years ago
7

Scientific knowledge is based on evidence. Where do scientists acquire evidence?

Biology
1 answer:
Ber [7]3 years ago
6 0

Answer:

Explanation:

Scientists collect their evidence through experimentation and/or observation.

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Identify two ecological benefits of this ecosystem
IrinaVladis [17]
Assuming that you're referring to forest ecosystem, the two ecological benefits of this ecosystem are :
- it provides habitats for many organisms
- It provide Oxygen supply for the world
6 0
3 years ago
During an action potential, which of the following changes significantly? Group of answer choices
tino4ka555 [31]

The process is ocurring by steps, starting with depolarization.

1- Na+ permeability > K+ permeability

2- Vm (membrane potential) approaches ENa+ (quilibrium potential for potassium)

3- K+ permeability > Na+ permeability

4- Vm (membrane potential) approaches EK+ (quilibrium potential for potassium)

4 0
3 years ago
As the electrons pass through the electron transport chain between Photosystem I and II, they use their energy to pump _________
skelet666 [1.2K]

Answer:

protons /H+

thylakoid membrane of the chloroplast

acid.

Explanation:

This is chemiosmosis. And the ultimate aim is to synthesis ATPs. Proton Motive Force generated from the electron transport chain continuously pump protons(H+) from the stroma into the thylakoid membrane of the chloroplast,

The build up of  protons/H+ generated electrochemical gradients between this  space and the stroma.

Therefore proton/H+ diffused down the gradient into the stroma. The energy generated from the downwards diffusion is used by the ATPase synthase to synthesize ATPs from ADP and inorganic phosphate (Pi), to be used in Calvin Cycle for CHO, productions.

The protons/H+ pumped by PMF and  concentrated in the thylakoid memebrane is obtained from the  split of Hydrogen atoms  to electrons(e-) and H+. since pH is negative Log of [H+], therefore the space will be acidic from large concentration of H+/protons.

5 0
3 years ago
Two species of tree frogs that live sympatrically in the northeastern United States differ in ploidy: Hyla chrysoscelis is diplo
Artist 52 [7]

Answer:

The correct answer is - polyploidy.

Explanation:

Speciation can be two types allopatric and sympatric speciation. Sympatric speciation is the process of speciation is developing the new species that diverged from the common ancestral species while the ancestral and developed species both can share the same place or geological area. The main cause of such speciation is due to the change in their genetic level more than environmental conditions.

In this case, the frog's species show differences in their ploidy level as well as their mating call but polyploidy is the most likely the difference that evolved first rather than females call for mating.

Thus, the correct answer is - polyploidy.

5 0
3 years ago
While examining a patient, the nurse notices that the patient has scales on the eyebrows. which condition would the nurse expect
deff fn [24]
Hello!

The correct answer is: Seborrhea. The nurse would expect the condition Seborrhea.


I hope this was helpful! c:
3 0
2 years ago
Read 2 more answers
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