Which of the following elements is required for the enzymatic reaction that produces phosphoenolpyruvate?

TLS Online TPP Program

#Question id: 12554

#Unit 10. Ecological Principles

Long-term studies of Belding's ground squirrels show that immigrants move nearly 2 km from where they are born and make up 1 to 8% of the males and 0.7 to 6% of the females in other populations. On an evolutionary scale, why is this significant?

TLS Online TPP Program

#Question id: 12555

#Unit 10. Ecological Principles

Demography is the study of

TLS Online TPP Program

#Question id: 12556

#Unit 10. Ecological Principles

Natural selection has led to the evolution of diverse natural history strategies, which have in common

TLS Online TPP Program

#Question id: 12557

#Unit 10. Ecological Principles

Natural selection involves energetic trade-offs between

TLS Online TPP Program

#Question id: 12558

#Unit 10. Ecological Principles

The three basic variables that make up the life history of an organism are

TLS Online TPP Program

#Question id: 12611

#Unit 10. Ecological Principles

Researchers in the Netherlands studied the effects of parental caregiving in European kestrels over 5 years. The researchers transferred chicks among nests to produce reduced broods (three or four chicks), normal broods (five or six),  and  enlarged  broods  (seven  or  eight).  They then measured the percentage of male and female parent birds that survived the following winter. (Both males and females provide care for chicks.) Brood Size Manipulations in the Kestrel: Effects on Offspring and Parent Survival

 

Which of the following is a conclusion that can be drawn from this graph?