Answer:
i think d but not too sure.
Explanation:
I think it is either d or b but pretty sure d
A little trick i learnt: The atomic number reflects how many electrons there are, and there must be an equal charge. therefore, there are the same amount of protons as there are electrons. so if it has 81 protons, we look for number 81 in the periodic table, Thallium
Answer:
Phenotypes:
Aa with a frequency of 2
aa with a frequency of 2
The children have equal chances of having aa or Aa
Biotic factors include plants, animals, fungi, algae, and bacteria so the only answer would be invasive species
Unfortunately this question is incomplete as it is a multiple choice question. The following options are provided:
<span>A) body cavity between body wall and digestive system
B) number of embryonic tissue layers
C) type of body symmetry
D) presence of Hox genes
E) degree of cephalization
The answer is D: presence of Hox genes
</span>
Hox genes are a group of genes that determine the basic structure and orientation of animals.
