Most developed countries have passed through a demographic transition and currently have low population growth rates

Indicate whether the statement is true or false


TRUE

Biology & Microbiology

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Which feature, if changed, would NOT abolish M13's utility as a cloning vector?

A) ssDNA genome becoming a dsDNA genome B) loss of genes that make coat proteins C) replacing the segment of non-coding DNA in its genome with an indispensible gene D) switch from lysogenic to lytic lifestyle

Biology & Microbiology

In the late 1960s, Carrell Williams and Karel Slama discovered that the insect Pyrrhocoris apterus, when grown in jars with paper towels made from balsam fir, underwent several extra larval molts and finally died without completing metamorphosis

Further investigation led to the conclusion that the fir trees synthesize a hormonal analog that acts as an insecticide. The molecule is actually an analog of juvenile hormone. Furthermore, the juvenile hormone analog discovered by Salma and Williams has no effect on most other metamorphosing insects, suggesting that: A. many insects reproduce as larvae. B. there has been some evolutionary divergence in the structure of juvenile hormone and in the juvenile hormone receptors of different insects. C. not all insects utilize juvenile hormone to stimulate metamorphosis. D. other insects have evolved methods to detect the juvenile hormone analog and are not found in balsam firs.

Biology & Microbiology

The zygote typically begins its development into an embryo here. _____

A) Endometrium

B) Testis

C) Cervix

D) Uterus

E) Oviduct

F) Ovaries

G) Vagina

H) Seminal vesicle

I) Penis

J) Prostate gland

K) Vas deferens

L) Glans penis

Biology & Microbiology

Which of the following would be the last form of prezygotic barrier that could take place in maintaining reproductive isolation between two individuals?

a. Mechanical isolation b. Hybrid breakdown c. Gametic isolation d. Habitat isolation e. Behavioral isolation

Biology & Microbiology