The demographic transition model depicts demographic changes from high- to low-level births and deaths in five stages

Stage 1 is characterized by total population numbers are low and the high birth rate is balanced by the high death rate.

B) Stage 2 is characterized by high population growth rate is results of high birth rate however, decline death rate

C) Stage 4 is characterized by decline in the proportion of the population in the reproductive age group and these changes stabilizes population size

D) Stage 3 is characterized by falling birth rates and death rates and population growth rate is zero due to the less numbers of people in the reproductive age group

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#Question id: 19025

#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,  the frequencies of the A and B alleles are 0.26 and 0.07, respectively. You now examine the ABO blood types in a new population. You observe that the A, B, and O blood types all have equal frequencies in this population. What are the frequencies of the A and O alleles in this population?

TLS Online TPP Program

#Question id: 19026

#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. You now examine the ABO blood types in yet another population. You observe that the AB blood type has a frequency of 0.50 in this population. What are the frequencies of the A and O alleles in this population?

TLS Online TPP Program

#Question id: 19027

#Unit 9. Diversity of Life Forms

The following characteristics all helped seedless plants become better adapted to land except 

TLS Online TPP Program

#Question id: 19028

#Unit 9. Diversity of Life Forms

Sporophylls can be found in which of the following? 

TLS Online TPP Program

#Question id: 19029

#Unit 9. Diversity of Life Forms

Assuming  that  they all belong to the same plant, arrange the following structures from largest to smallest (or from most inclusive to least inclusive). 

1. Spores                 2. Sporophylls 

3. Sporophytes 4. Sporangia 

TLS Online TPP Program

#Question id: 19030

#Unit 9. Diversity of Life Forms

Of the following list, flagellated (swimming) sperm are generally present in which groups? 

1. Lycophyta                 2. Bryophyta 

3. Angiosperms 4. Chlorophyta 

5. Pterophyta