Practice Questions

TLS Online TPP Program

#Question id: 1020

HIV/AIDS can be categorized as a new or emerging infectious disease. By putting it into this category, we are effectively saying that

#Unit 4. Cell Communication and Cell Signaling

this infection hasn't been observed in the human population prior to recent (approximately 50 years or sooner) outbreaks
this disease has been in susceptible populations for centuries, but has only recently achieved infection levels that became detectable.
the infectious agent is still evolving and changing, unlike with older, more established diseases such as plague or polio.
the disease has always been in susceptible populations and causing disease, but we lacked the technology to detect it.

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TLS Online TPP Program

#Question id: 18969

#Unit 8. Inheritance Biology

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows:C

Assume Hardy-Weinberg equilibrium. In Norway, the frequencies of the A and B alleles are 0.26 and 0.07, respectively. What is the frequencies of these six genotypes (AA, AO, BB, BO, AB, and OO);

TLS Online TPP Program

#Question id: 18970

#Unit 8. Inheritance Biology

Consider the ABO “blood type” gene. This single gene has three alleles called A, B, and O. There are four resultant “blood types” (phenotypic classes), as follows:

Assume Hardy-Weinberg equilibrium, the frequencies of the A and B alleles are 0.26 and 0.07, respectively. What is the frequencies of the four blood types such as A, B, AB and O in Norway;

TLS Online TPP Program

#Question id: 18971

#Unit 9. Diversity of Life Forms

The following are all true about the life cycle of mosses except

TLS Online TPP Program

#Question id: 18972

#Unit 9. Diversity of Life Forms

Beginning with the germination of a moss spore, what is the sequence of structures that develop after germination?

1. Embryo 2. Gametes

3. Sporophyte 4. Protonema

TLS Online TPP Program

#Question id: 18973

#Unit 9. Diversity of Life Forms

Bryophytes may feature all of the following at some time during their existence except

TLS Online TPP Program

#Question id: 18974

#Unit 9. Diversity of Life Forms

Which feature of cycads distinguishes them from most other gymnosperms?

1. They have exposed ovules

2. They have flagellated sperm

3. They are pollinated by animals