1. <span>composed of cells with cell walls
2. </span><span>Vertebrates contain a backbone, while invertebrates do not.</span>
Answer:
25%
Explanation:
We have 2 independent genes with 2 alleles each: L/l and W/w
- W_: whiskers
- ww: no whiskers
- L_: long whiskers
- ll: short wiskers
Individuals with short whiskers will have the genotype <em>WWll </em>or <em>Wwll</em>.
<u>A cross between a rat heterozygous for both genes and a homozygous recessive rat is done:</u>
<h3>WwLl x wwll</h3>
-The homozygous rat will produce only <em>wl </em>gametes.
-The heterozygous rat will produce the following gametes: <em>WL</em>, <em>Wl</em>, <em>wL</em>, <em>wl</em>.
If you do a Punnett Square, you'll get that 25% of the offspring will be WwLl and will have short whiskers.
Absolute dating provides the accurate age of a fossil which relative dating cannot.
Explanation:
Two methods of dating falls under the study of geology, one is absolute and the other is relative dating. Both the processes evaluate the period and age of a rock or fossil.
In the absolute process the age in number of a sample rock can be determine and relative process determines the relative age by observing the surrounding layers.
Absolute one is performed with various methods, like- radiometric dating, amino acid dating etc. and relative involves- stratigraphy, cross dating etc.