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3 years ago

What is believed to be the most significant result of the evolution of the amniotic egg?

1 answer:

8 0

I think the most critical consequence of the advancement of the amniotic egg it the tetrapods were no longer attached to the water for reproduction.The amniotic egg permits reptiles, flying creatures, and warm-blooded creatures to lay eggs ashore without drying out. The liquid filled depression containing the incipient organism is isolated from the outer condition by an amniotic sac that is impermeable to water.

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Which cell is unspecialized? blood cell stem cell epithelial cell gamete

Free_Kalibri [48]

<span>Stem cells. There are two types of stem cells: adult stem cells - these are unspecialised cells that can develop into many (but not all) types of cells. Embryonic stem cells - these are unspecialised cells that can develop into any type of cell. And that's all! ;)

Hope this is useful !!!^_~!!!</span>

8 0

4 years ago

Read 2 more answers

Which statement best describes the role carbon plays in the structure of compounds present in living things?

aev [14]

i believe the answer is "A fundamental role". hope this helps.

7 0

3 years ago

When a living organism dies, it stops taking in new carbon. Thus, as the radioactive carbon-14 decays, the ratio of carbon-12 to

Alexxandr [17]

Answer: The fossil is 11459 years old.

Explanation:

Half-life of carbon-14 = 5700 years

First we have to calculate the rate constant, we use the formula :

$k=\frac{0.693}{5700\text{years}}$

$k=1.21\times 10^{-4}\text{years}^{-1}$

Now we have to calculate the age of the sample:

Expression for rate law for first order kinetics is given by:

$t=\frac{2.303}{k}\log\frac{a}{a-x}$

where,

k = rate constant = $1.21\times 10^{-4}\text{years}^{-1}
t = age of sample = ?
a = let initial amount of the reactant = 100 g
x = amount decayed = 75 g
a - x = amount left after decay process = 100 - 75 = 25 g Now put all the given values in above equation, we get
[tex]t==\frac{2.303}{1.21\times 10^{-4}}\log\frac{100}{25}$

$t=11459years$

The fossil is 11459 years old.

4 0

3 years ago

In a certain aquatic biome, the fish and turtles feed on sea grasses. Recently, the availability of sea grasses in that aquatic

larisa [96]

The type of competition that exist between the two species is INTERSPECIFIC COMPETITION.
There are basically two types of competition in any given ecosystem, these are intraspecific and interspecific competition. Intraspecific competition occurs among organisms of the same species while interspecific competition occurs among organisms of different species.<span />

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3 years ago

Choose facts for Inner planets. (more than one answer possible)

Dovator [93]

Answer:

inner planets are closest to the sun.

inner planets are smaller in size as compared to the outer planets. inner planets have shorter period of revolution as compared to other planets. inner planets are found before Asteroid belt.

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3 years ago