Question

Both Darwin and Lamarck proposed mechanisms by which species might evolve. Although Darwin first published his ideas in the mid-1800s, most scientists continued to favor Lamarck's explanation until near the end of that century. What was the most likely cause of the eventual shift from Lamarck's hypothesis to that proposed by Darwin? (2 points)

Answer 1

@Avenged7x @Donblue22

Answer 2

a. A new generation of scientists was more open to considering new ideas.
b. Lamarck's hypothesis did not take into consideration all that had been learned about genetics.
c. More evidence accumulated supporting Darwin's ideas than could be found to support Lamarck's.
d. It took several decades for Darwin's ideas to appear in textbooks and for scientists to learn about them.

Answer 3

The answer is c

Answer 4

Scientists have observed that pythons have vestigial leg bones. They have also observed that snakes in general have more DNA sequences in common with four-legged geckos than they do with legless eels. What do these two observations have in common? (2 points)

Answer 5

Thaks man

Answer 6

no problem

Answer 7

a. They both suggest that geckos evolved from snakes.
b. They both suggest that pythons are more primitive than other snakes.
c. They both suggest that snakes evolved from an ancestor with legs.
d. They both suggest that snakes evolved from geckos.

Answer 8

I think its D

Answer 9

I have 9 more of these.

Answer 10

How might a comparison of the anatomy of two closely related animals such as lizards and snakes provide information about their evolutionary history? (2 points)
Choose one answer.
a. A greater number of shared traits would mean they recently diverged from a common ancestor.
b. The anatomical differences between them would indicate which evolved from the other.
c. Physical traits shared between them would explain how they evolved in parallel, without relation.
d. Shared traits would indicate they must have a close relative in common.

Answer 11

You there Don

Answer 12

D

Answer 13

Working on an online class at the same time

Answer 14

Oh. ok sorry

Answer 15

its fine

Answer 16

Organism A shares 50% of its DNA sequences with organism B, while organisms B and C share 90% of their DNA sequences. What can be concluded from this? (2 points)
Choose one answer.
a. Organisms B and C are probably full siblings while organism A is a grandparent of both.
b. Organism A is more ancient than either organism B or organism C.
c. Organisms B and C are more closely related to each other than they are to organism A.
d. Organism A has suffered more mutations than organisms B or C.

Answer 17

Ok bro

Answer 18

It is c

Answer 19

Woolly mammoths were grass-eating mammals that resembled elephants but with heavy coats, large tusks, and small ears that made them suited for extremely cold weather of the ice age. In addition to hunting by humans, which other conditions may have caused woolly mammoths to become less reproductively successful and eventually become extinct at the end of the last ice age? (2 points)
Choose one answer.
a. Decreased grassland habitat size caused by a warmer climate
b. Decreased mammoth predator population size caused by warmer climate
c. Increased production of offspring adapted to the changing environment
d. Increased genetic variation in mammoth populations in warmer latitudes

Answer 20

a

Answer 21

Although most gray squirrels have gray fur, sometimes individuals with white or black fur are born. If a white-furred individual were born in a population of gray squirrels living in a Florida forest, what would be the most likely long-term consequence of its presence for the squirrel population if the forest remained unchanged for the next several generations? (2 points)
Choose one answer.
a. The population would very quickly become predominantly white since the white squirrels would be camouflaged against the sand.
b. The number of white squirrels in the population would slowly increase as the original white squirrel produced white offspring.
c. The population would remain primarily gray, and the white squirrel would likely get eaten prior to adulthood.
d. The white squirrel would draw more predators to the area since it was more visible, and many gray squirrels would get eaten.

Answer 22

C

Answer 23

A scientist has kept records of the color variations in a field of phlox for several generations. Phlox is an annual plant that produces flowers in a variety of shades ranging from white to red. Initially the field contained equal proportions of white, pink, and red flowers. By the end of the study the proportions of flowers in the field were 80% red, 15% pink, and 5% white. Which of the following inferences best explains the change in flower color proportions? (2 points)
Choose one answer.
a. Bees visiting the field are more likely to see the white flowers and gather pollen from them.
b. The red flowers produce fewer seeds than the white flowers.
c. A predator has been introduced that prefers to eat red flowers.
d. Some environmental change has happened that favors the red flowers.

Answer 24

In what way did an increased skull and brain size affect hominid evolution from early ancestors to modern humans? (2 points)
Choose one answer.
a. They became less reliant on vision and more reliant on all of their senses.
b. They became less reliant on tools and more reliant on social interactions.
c. The larger brain size increased, causing their overall body size to decrease.
d. The gestation and infant care period increased to allow the brain to develop.

Answer 25

A scientist makes a claim that two hominid species have a common evolutionary ancestor. Which of the following must happen to ensure this claim can be considered valid? (2 points)
Choose one answer.
a. The scientist's hypothesis must be reviewed and revised.
b. Funding for research must be obtained to conduct experimental trials.
c. Experiments must be conducted to determine where the species' fossils can be found.
d. Scientific evidence must be found, verified, and accepted by the scientific community.
Question 12
Marks: 2

(05.03 MC) A team of scientists is researching the relationship between the two subspecies of A. africanusand concludes that the subspecies were actually different species. Which of the following would increase the reliability of this conclusion? (2 points)
Choose one answer.
a. A second group of scientists finding significant differences in the DNA of the two different subspecies
b. Providing a description of the methods used in their experiments that led to the conclusion
c. Finding the two different subspecies of the species in different geographic locations
d. Publishing their research in order to make their findings available to the public

Answer 26

Please don't give direct answers.It is against the \(\bf\color{purple}{\href{/code-of-conduct}{Code~of~Conduct}}\) @Donblue22