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3 years ago

Charles Darwin used domesticated animals to provide evidence for evolution by natural selection. What is this evidence?

1 answer:

6 0

Charles Darwin used domesticated animals to provide evidence for evolution by natural selection by showing "Differences between breeds show that selection can cause species to change."

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Which of the following pieces of evidence DOES NOT support Wegner's Theory of Continental Drift?

11111nata11111 [884]

I've looked us up ever since you posted it the only thing I can come up with is letter A because it talks a lot about Mountain chains that talks a lot about the ocean floor and the Hawaiian stuff so try a

5 0

3 years ago

Read 2 more answers

Please help!! I WILL GIVE BRAINLIEST !! Can you figure out the modern spreading rate of the Mid- Atlantic ridge? Use that line t

Naddik [55]

Answer:

R = 16mm/y

Explanation:

Modern Spreading Rate (R) = distance the seafloor moved in km (d) / age in million years (t)

R = d/t

To calculate it in millimeters per year we need to convert it:

1 km = 1000 m

1 m = 100 cm

1cm = 10mm

1 km = 1,000,000 mm

The problem states that in 150 million years, there is a distance of 2400 km.

if 1 km ------- 1,000,000 mm

2400 km-------X = 2400,000,000 mm

If 1 million years -------1,000,000 years

150 my----X = 150,000,000 years

R = d/t

R = 2400,000,000 mm/150,000,000 y.

R = 16mm/y

6 0

2 years ago

PLEASE LOOK AT THE PICTURE SOMEONE HELP ME IM SO STUCK ON THIS!!!

kobusy [5.1K]

Answer:

It's either B or C

sorry i couldn't be of more help

Explanation:

4 0

3 years ago

If a crystal of potassium permanganate is placed on agar and after 15 minutes the diameter of the area over which the dye has sp

Vadim26 [7]

Answer:

Diffusion rate is 1.96 × $10^{-3}$ $cm^{2}$ /s

Explanation:

Diffusion is the process in which the molecules of a substance propagates from a region of higher concentration to region of lower concentration through a semi-permeable membrane.

diffusion rate = $\frac{area}{time}$

Given that; diameter = 15 mm, time = 15 minutes.

The dye spread in a circular form, so that;

area = $\pi$ $r^{2}$

r = $\frac{diameter}{2}$ = $\frac{15}{2}$ = 7.5 mm = 0.75 cm

area = $\frac{22}{7}$ × $(0.75)^{2}$ = 1.7679 $cm^{2}$

time = 15 minutes = 15 × 60 = 900 seconds

So that;

diffusion rate = $\frac{1.7679}{900}$

= 0.0019643 $cm^{2}$ /s

Diffusion rate is 1.96 × $10^{-3}$ $cm^{2}$ /s

7 0

3 years ago

Which two cell parts are most likely found in both types of cell? Ocell wall and cell membrane O lysosome and vacuole O vacuole

atroni [7]

Answer:

The correct answer is - lysosome and vacuole.

Explanation:

In the cells of animals and plants, there are many similarities and some differences as well. These similarities and differences include the organelle they both have common or specific to a particular cell.

Lysosome and the vacuoles are two organelles found in both cells; plants, and animals. In plants, there is a central vacuole large in size whereas in the animal cells the numbers are much higher and size is smaller in size. Lysosomes are also present in both animals as well as the plant cell.

Thus, the correct answer is - lysosomes and vacuole.

4 0

3 years ago