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question 57

Multiple Choice

The following questions are based on the description below.
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage) .
-If the current molecular evidence regarding animal origins is well substantiated in the future, then what will be True of any contrary evidence regarding the origin of animals derived from the fossil record?


Definitions:

Cancerous Tissues

Abnormal tissues that contain cancer cells which can grow uncontrollably and have the potential to spread to other parts of the body.

Nausea

A sensation of unease and discomfort in the upper stomach, often preceding vomiting.

Immune System

The complex network of cells, tissues, and organs that work together to defend the body against attacks by foreign invaders, such as bacteria, viruses, and other pathogens.

Keratinocytes

The predominant cell type in the epidermis, responsible for producing keratin, a key protein in the skin’s outer layer.

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