Bioaccumulation of this chemical lead to bird eggs with weak shells and nonviable offspring:

2 answers:

7 0

Bio accumulation of DDT lead to bird eggs with weak shells and non viable offspring. The lethal effects of DDT on birds was first noted in 1950; scientists discovered that earthworm was accumulating the DDT pesticide and that the robins that were preying on the earthworms were been poisoned. Further research revealed that the chemical cause thinning of the egg shell and production of non viable offspring. The chemical has since been banned in USA.

ELEN [110]4 years ago

6 0

Bioaccumulation of the chemical DDT lead to weakened shells in birds, especially those of eagles.

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You are a volcano scientist investigating an eruption. You observe that the eruption has been going on for weeks and the lava sl

uysha [10]

A slow
b very viscous (viscosity is the thickness)
c no
d effusive eruption SHIELD VOLCANO

7 0

2 years ago

A phenotypic ratio for a dihybrid cross is predicted to be 9:3:3:1. The experimental values are:

Maslowich

Two traits that we are examining are the color (purple/white) and the smoothness.
In our sample, we have 135 individuals ( 75 +28+24+8= 135).

Since we know that expected ratio of a dihybrid cross, is 9:3:3:1 we can calculate what is the expected values of each phenotype is.

So, for the white wrinkled phenotype, we expect that there will be one-sixteenth of the whole sample ( there are 16 parts of the whole sample 9+3+3+1=16).
So, we multiply the whole sample- 135 with one-sixteenth (or 0.0625) and get 8,4375.
When you calculate the values for all phenotypes you get results shown in the attached excel table.
When you have your expected and experimental values you compare them with a chi-square test. (The test determines if the difference between the expected and experimental results is statistically significant).

4 0

3 years ago

Read 2 more answers

If the net force an object at rest is zero the object will remain at rest. True or false

FromTheMoon [43]

True

Explanation:

If the net force on an object at rest is zero, the object will remain at rest. This is one of the postulates of newton's law of motion.

Newton's first law of motion states that "an object will continue in its state of rest or uniform motion unless if it is acted upon by an external force. "