Practice Questions

TLS Online TPP Program

#Question id: 8717

Molecular clocks are more reliable when ________.

#9. Diversity of Life Forms

the surrounding pH is close to 7.0
most mutations of highly conserved DNA sequences should have no functional effect
the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
a significant proportion of mutations are not acted upon by natural selection

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TLS Online TPP Program

#Question id: 5540

#5. Developmental Biology

A new-born infant attains maternal antibodies from the mother's

TLS Online TPP Program

#Question id: 5541

#5. Developmental Biology

What is the valued average rate at which the human brain produces neurons during development?

TLS Online TPP Program

#Question id: 5542

#5. Developmental Biology

One stage of cleavage is the morula stage which is:

TLS Online TPP Program

#Question id: 5543

#5. Developmental Biology

What is the purpose of the chorion in terrestrial vertebrate embryos?

TLS Online TPP Program

#Question id: 5544

#5. Developmental Biology

Which embryonic membrane forms the commonly of the placenta?

TLS Online TPP Program

#Question id: 5545

#5. Developmental Biology

The placenta functions as a(n):