Bio Exam 2

Question 1

The name of the meristem that ultimately gives rise to secondary xylem and phloem is

Answer 1

vascular cambrium

Question 2

Of the following features which is mostly likely shared in the animal kingdoms

Answer 2

a symmetrical body plan

Question 3

Plants regulate gas exchange and water loss via

Answer 3

guarded stomata

Question 4

What is the role of cleavage in the early embryo?

Answer 4

produce many cells

Question 5

True segmentation is found in which of the following phyla?

Answer 5

Arthropods, Annelida, Chordata

Question 6

A human recessive trait appears in 1 in 100 births. What frequency of people are homozygous dominant for this trait?

Answer 6

0.81

Question 7

Human fetus hemoglobin has a what?

Answer 7

has a higher affinity for O2 than adult hemoglobin has.

Question 8

A tyrannosaurus rex’s (a dinosaur) closest relative is a

Answer 8

chickens, birds

Question 9

Low body temperature triggers adaptive responses to conserve heat. Once the integrating center detects that body temperature has risen, it will decrease these responses? What does this exemplify?

Answer 9

Negative feedback

Question 10

The hallow crater formed during gastrulation is known as a

Answer 10

archenteron

Question 11

Which of the following is not a fetal membrane?

Answer 11

endometrium

Question 12

____ Do not have tidal flow of air

Answer 12

birds

Question 13

Many plants devote significant resources to growing colorful, fragrant flowers filled with nectar. What does this illustrate the importance of?

Answer 13

outcrossing

Question 14

The lungs in birds and mammals both

Answer 14

exchange O2 and CO2 with blood in capillaries

Question 15

Which tissues are incorrectly matched to their progenitor germ layer?

Answer 15

endoderm- muscles

Question 16

During a drought on the Galapagos island, finches with higher beaks were able to arrack the largetoguh seed produced by parts that survived the dry conditions. This is an example of

Answer 16

directional selections

Question 17

Structures that have no apparent function but had a function in ancestral species are vestigial structures

Answer 17

vestigal structures

Question 18

An adaption in arthropods that allowed them to colonize land was

Answer 18

the ability to close spiracles to prevent water loss

Question 19

Which structure does NOT represent a mode of vegetative reproduction?

Answer 19

seeds

Question 20

Birds, like mammals, can regulate their body temperatures within close limits. Therefore birds and mammals are called

Answer 20

endothemric

Question 21

Several species of sea urchins live close to each other and practice external fertilization. They seldom interbreed because eggs produce chemicals that are only attractive to sperms of their own species. This is an example of a ____ barrier that ________

Answer 21

pre-zygotic: that prevents gametes fusion

Question 22

In fish

Answer 22

Blood flows over the gas exchange surfaces in a direction opposite of the flow of water ( counter current flow)

Question 23

The process of moving water through a plant by transpiration works because water molecules stick to each other with:

Answer 23

hydrogen bonds

Question 24

The frequency of a particular allele within a population can be changed, over time, by

Answer 24

selection

Question 25

Water moves through a plant by each of the following methods except

Answer 25

through the Caspian strip

Question 26

Hemoglobin releases ______ in acidic environment

Answer 26

more O2

Question 27

Increased CO2 bloodstream results in

Answer 27

the rate of respiration increasing

Question 28

In Drosophila, the cells created by cleavage contain different developmental signals from the egg called cytoplasmic

Answer 28

determinants

Question 29

Which of the following is false?

Answer 29

Myoglobin has a lower affinity for O2 than hemoglobin does

Question 30

veins in leaves consist of

Answer 30

vascular cells

Question 31

Which one of the following features is unique to animals?

Answer 31

moments associated with muscle tissue and nervous tissues

Question 32

Dogs use panting to dissipate excess heat. What part of their brain detects the need for this response and sends the signal to pant?

Answer 32

Hypothalamus

Question 33

Which os the following is NOT a mechanism to prevent polyspermy?

Answer 33

species proteins inside the eggs compare the DNA of different sperms, choosing the most adapted on

Question 34

How can you distinguish sea urchin embryos from frogs gastrula embryo?

Answer 34

Sea urchin have relatively yolk- poor eggs with similar animal and vegetal of poles, whereas frogs have large amounts yolk distinguishing the vegetal pole from animal pole

Question 35

The uneven distribution of an impermeable solute on either side of a membrane will result in

Answer 35

osmosis

Question 36

All blastula contains an

Answer 36

hallow blastocel

Question 37

Unlike primary growth, secondary growth

Answer 37

involves growth in plant diameter

Question 38

Plants regulates water loss via

Answer 38

guarded stromata

Question 39

What is the role of the cleavage in the early embryo?

Answer 39

Produce many cells

Question 40

True or False Segmentation is found in which of the following phyla?

Answer 40

Arthropoda, Annelida, Chordata

Question 41

Which of these is not a method used by ectotherms to affect body temperature?

Answer 41

increasing metabolic rate

Question 42

________ combines with water to form carbonic in the capillaries

Answer 42

CO2

Question 43

Pure water without applied pressure has a water potential that is equal to

Answer 43

0.0 MPa

Question 44

As adaptations for flight, the wings of bats and the wings of birds are an example of

Answer 44

Convergent evolution

Question 45

The nutritious flesh of many fruits has the function of

Answer 45

Attracting seed dispenser

Question 46

What pattern of cleavage is the characteristics in mammals?

Answer 46

Holoblastic cleavage with eggs containing very little yolk but the inner cell is concentrated at one pole