evolution

It is possible that modern humans may have comingled with which of these other ancestors?

Homo neanderthalensis

genetic shift

a change in versions of genes in a population due to random differences in survival rates.

population

a group of individuals of the same species living in a defined area

DNA sequence similarity

a measure of how closely related two species are

shared characteristics

are thought to result from species sharing a common ancestor

Which of the following organisms are extant eutherian mammals and most closely related to humans?

chimpanzees

gene flow

exchange of genes between populations

genetic bottleneck

is a drop in the size of a population, for a least one generation, that causes a loss of genetic variation.

Which of the following anatomical changes was an especially important contributor to the development of full bipedalism in hominins?

restructuring of the pelvis accompanied by a change in the angle of knee joints that support body weight

homologous traits

similar structures of organisms resulting from the common descent from a common ancestor

common descent

species share common ancestors

In the last few weeks of pregnancy, the level of estrogen in the woman's blood rises. This increase causes

the muscles of the uterus to become more sensitive to the hormone oxytocin.

natural selection

the process that allows individuals with inherited characteristics to survive and reproduce in response to a particular environment better than others

Your friend Tula, who is pregnant, learns that you are studying biology and tries to quiz you about your knowledge of pregnancy. She tells you that her baby has just starting kicking, and she asks you to guess how far along she is. Based on your understanding of life in the womb, you would answer that she is in about her ________trimester.

third

vestigial traits

traits that appear as reduced or degenerated parts whose function is hard to discern

Which of the following is an example of the last segment of an arthropod's body having evolved into a beneficial trait?

wasp abdomen with a stinger

If a female's mitochondrial DNA was sequenced and compared to the sequence of mitochondrial DNA isolated from her mother's paternal grandmother (the mother of her mom's dad), she likely ________be a significant match because ________.

would not; a person's mitochondrial DNA is inherited from her mom who inherited it from her mom

Is it possible for Homo sapiens and Neanderthals to be related even if humans are not the direct descendants of Neanderthals?

yes, because humans and Neanderthals share a common ancestor

Males and females both produce estrogens, progestogens, and androgens. Which of the following is accurate for typical males and females?

Males have more androgens than estrogens. Females have more estrogens than androgens

evolution

a change in the overall inherited characteristics of a group of organisms over multiple generations

The correct two-word Latin scientific name for modern humans is

homo sapiens

Possums are found throughout much of Central and North America. Although their bodies are covered in hair, their tails and ears are hairless. They have many teeth and opposable clawless "thumbs" on their rear appendages. They produce poorly developed young that live in mom's pouch for about two and a half months before climbing on her back. Possums are

marsupials.