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3 years ago

Which statement describes how to appropriately handle live earthworms in a lab investigation?

Biology

2 answers:

padilas [110]3 years ago

7 0

Answer: Pick up earthworms gently with moist hands.

Explanation: edg 2020

rodikova [14]3 years ago

6 0

Can you post the options?

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disa [49]

It didn't let me type my answer. Hope this helps!

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2 years ago

1. How have humans evolved in regards to their brain size, jaw

ale4655 [162]

Endocasts of Homo erectus (left) and Homo sapiens (right) illustrate rapid increase in brain size. As early humans faced new environmental challenges and evolved bigger bodies, they evolved larger and more complex brains. Large, complex brains can process and store a lot of information.

6 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

What process takes place in the structure? A. cellular respiration B. mitosis C. circulation D. chromatography A. cellular respi

Travka [436]

Cell respiration takes place in the mitochondria.

8 0

3 years ago

Read 2 more answers

The many species of tree frogs that inhabit forests in the eastern US maintain their genetic isolation from other species by sev

Elena L [17]

Answer:

b. behavioral isolation

Explanation:

It is a type of reproductive barrier that can lead to speciation. Behavioral behavior, such as mating rituals as in when two populations of the same species show some difference in behavior, typically in mating rituals

and signals.

8 0

3 years ago