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Use the information to answer the question.
One small animal phylum (Placozoa) contains only two species, Trichoplax adhaerens (T. adhaerens) and T. reptans. There are four types of cells, none of which are nerve or muscle cells, and none of which have cell walls. T. adhaerens sperm cells have never been observed. Embryos up to, but not past, the 64-cell (blastula) stage have been observed.
On the basis of information in the paragraph, which of these should be able to be observed in T. adhaerens?
Menstrual Period
A monthly cycle where the female body sheds the lining of the uterus, leading to bleeding through the vagina, a natural part of the reproductive system.
Conception
The process of fertilization where a sperm cell unites with an egg cell, leading to the formation of a zygote and the beginning of pregnancy.
Fetal Alcohol Syndrome
A condition in a child that results from alcohol exposure during the mother's pregnancy, causing brain damage and growth problems.
Fetal Alcohol Effect
A condition resulting from alcohol exposure during pregnancy, characterized by developmental delays and problems in behavior or cognition, less severe than Fetal Alcohol Syndrome.
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