The slide of stages in starfish development illustrates stages from unfertilized egg to gastrula—typical of echinoderms and chordates that have very little yolk in the egg. Three embryonic cell layers—ectoderm, endoderm, and mesoderm—are established. All adult tissues are derived from these layers.
Answer:
0.949367 ≈ 0.95.
Explanation:
The chi square analysis can be done by the formula as follows:
Chi square = (O-E)²/E
Here, O is observed value and E is expected value.
The tall trait follows the Mendel's law, this means the cross between F1 results in the formation of progeny with ratio 3( tall) : 1 (short).
The observed values for set I is 63 tall, 16 short.
The expected value for tall plant = 
= 59.25 .
The expected value for short plant = 
= 19.75.
Put these value in the formula for chi square analysis:
For tall plants = ( 63 - 59.25)²/ 59.25= 0.237.
For short plants = (16 - 19.75)²/ 19.75 = 0.712
Total value for set I = 0.237 + 0.712 = 0.95.
Thus, the answer is 0.95.
Answer:
The correct option is ALL OF THE CHOICES ARE CORRECT.
Explanation:
Germicidal chemicals are chemical substances that are normally used to eliminate germs. There are many factors that one needs to consider when it comes to choosing and buying the right germicide. For instance, one has to consider the suitability of the germicide with the material that is been treated, one has to consider the impacts of the chemical on the environment, one also has to consider the cost, toxicity, safety and other factors. Thus, all the factors given in the options have to be considered when one is trying to decide on the right germicide.
