BIOLOGY HIGH SCHOOL

Which best describes embryonic stem cells?A.) They are capable of self-renewal only.
B.) They are capable of differentiation only.
C.) They are capable of self-renewal and limited differentiation.
D.) They are capable of self-renewal and unlimited differentiation.

Answers

Answer 1
Answer:

D.) They are capable of self-renewal and unlimited differentiation.
Answer 2
Answer:

Answer:

D.

Explanation:

on edg

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The sides of the DNA molecule, the rails of the ladder, are composed ofA. phosphates only.B. nitrogenous bases only.C. phosphates and sugars.D. nitrogenous bases and sugars.

Which factor is not used to define biomes? a. plant structures b. leaf type c. historical similarities d. climate

Answers

Historical similarities are not a factor that defines biomes becausethey are identified with particular patterns of ecological succession tomaintain the state of equilibrium of the local ecosystem that has manybiotopes. Biomes are not defined by genetic or historical similaritiesand are different from ecozonas.

Which most likely describes a supersaturated solution? A. a hot solution with all of the solute dissolved
B. a cold solution with all of the solute dissolved
C. a hot solution with most of the solute resting on the bottom
D. a cold solution with some solute resting on the bottom

Answers

Answer is A. a hot solution with all of the solute dissolved.

A solution is a homogeneous mixture in which solute is dissolved in solvent. Solution may be unsaturated, saturated and supersaturated. Saturated solution is the solution in which solvent is not able to dissolve more solute at normal temperature.  But if you heat the saturated solution up to 80⁰C, the same solution able to dissolve more solutes making the solution supersaturated. Thus, a supersaturated solution is a solution that contains more solute than what the solvent can normally dissolve.

a. because when the solution is hot it is easier to dissolve the solute, and thus more solute can be dissolved in the same amount of solvent

What are 4 biotic facts about the tundra??

Answers

Biotic factors are grass and trees, animals, plants, insects, humans, dirt, air and food.
Cold, dry, frozen soil, lots of sand

As sound enters the ear, it vibrates the ______________ at the boundary between the outer ear and middle ear, causing the sound waves to then vibrate the hammer.a. ear drum
c. stirrup
b. cochlea
d. anvil

Answers

A. The ear drum vibrates causing it to move the malleus causing sound.
(A. eardrum <----- is the answer

When environmental conditions are unfavorable, why is it an advantage for green algae to reproduce sexually? a. They are multicellular when conditions are unfavorable, which favors sexual reproduction.
b. Sexual reproduction produces larger numbers of offspring in less time.
c. Sexual reproduction produces offspring that have greater genetic variety and durable zygotes that can help green algae species survive unfavorable conditions.
d. Sexual reproduction produces multicellular algae instead of unicellular algae. Multicellular algae are better able to survive harsh conditions.

Answers

d. Sexual reproduction produces offspring that have a greater genetic variety and durable zygotes that can help green algae species survive unfavourable conditions.

Wuthering Heights shares literary elements with Frankenstein. These novels belong to which literary genre?A. horror
B. gothic
C. fantasy
D. legend

Answers

Wuthering Heights shares literary elements with Frankenstein. These novels belong to the literary genre known as B. gothic.
Although Frankenstein can also be classified as a horror novel, Wuthering Heights cannot. It is also not a fantasy or a legend. 

Answer:

the answer is B. gothic.
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Anaerobic photoautotrophs were the first organisms to release oxygen into the early atmosphere.True False