Which of the following occurs during artificial selection but not natural selection?
a. Selection pressures result in only certain traits from a population being passed on to offspring.
b. Traits are passed to offspring through genes.
c. Males and females mate and produce offspring.
d. Traits that make an organism more beneficial to humans are favored.
Which of the following explains why fossils of some extinct organisms have been found while others have not?
a. Fossils only exist for organisms that lived over 3 million years.
b. Fossils only exist for organisms that had shells or hard outer body coverings.
c. Most organisms die and decompose without leaving any fossil remains.
d. Only very large organisms have enough body mass to result in fossil formation.
My answers: D,B
1. Which of the following occurs during artificial selection, but not during natural selection?
Incorrect answer A. Selection pressures result in only certain traits from a population being passed on to offspring.
Incorrect answer B. Traits are passed to offspring through genes.
Incorrect answer C. Males and females mate and produce offspring.
Correct answer D. Traits that make an organism more beneficial to humans are favored.
2. Scientists infer evolutionary relationships between organisms by comparing their
Incorrect answer A. number of offspring
Correct answer B. homologous structures
Incorrect answer C. environments
Incorrect answer D. trace fossils
3. Suppose a biologist observes many individuals in a species of flowering plant. She notices that some of the individuals open their flowers in the middle of the day and close at dusk, while others do not open until much later in the afternoon and close after dark. Flowers need to be open for pollinators to visit and transfer pollen for the plant to reproduce. Which of the following is likely to occur over time?
Incorrect answer A. artificial selection
Incorrect answer B. competition
Incorrect answer C. extinction
Correct answer D. speciation
4. Which of the following explains how natural selection leads to evolution?
Incorrect answer A. Conditions in the environment reduce competition for resources within a species.
Correct answer B. Helpful variations accumulate among surviving members of the species.
Incorrect answer C. Overproduction provides food for stronger members of the species.
Incorrect answer D. Environmental changes favor weaker members of the species.
5. Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?
Correct answer A. natural selection
Incorrect answer B. overproduction
Incorrect answer C. competition
Incorrect answer D. variation
6. Which of the following would not be useful in determining the age of a fossil?
Incorrect answer A. radiometric dating of the rock containing the fossil
Incorrect answer B. relative dating of the layers surrounding the fossil
Incorrect answer C. identification of fossils of known age found near the fossil in question
Correct answer D. analysis of the stage of embryological development represented by the fossil
7. Humans developed antibiotics to fight bacterial infections. However, some antibiotics are no longer effective in killing the bacteria they once killed. How does the theory of evolution explain this?
Incorrect answer A. The antibiotic mutated the bacteria, which allowed resistance to develop.
Incorrect answer B. After being exposed to the antibiotic, individual bacteria acquired the ability to resist the antibiotic.
Correct answer C. Genetic variation in bacteria made it possible for some individuals to have resistance to the antibiotic, survive, and reproduce.
Incorrect answer D. The antibiotic mutated to an ineffective form.
8. Which of the following explains why fossils of some extinct organisms have been found while others have not?
Incorrect answer A. Fossils only exist for organisms that lived over 3 million years ago.
Incorrect answer B. Fossils only exist for organisms that had shells or hard outer body coverings.
Correct answer C. Most organisms die and decompose without leaving any fossil remains.
Incorrect answer D. Only very large organisms have enough body mass to result in fossil formation.
9. Over millions of years of time, an island’s vegetation shifts. The seed-producing plants that dominated the early origins of the island die out in favor of new species of plants that do not produce seeds but provide a good habitat for insects. How is this change likely to affect a species of birds that uses seeds as its primary source of food and insects as a secondary food source?
Incorrect answer A. The species will maintain its heritable traits while learning to make insects their primary food source.
Incorrect answer B. The species will decline and become endangered because its adaptations have reduced utility.
Incorrect answer C. The species will split into two: one adapted to eating seeds and a second adapted to eating insects.
Correct answer D. Over time, a shift in traits will be observed as the species adapts to an insect diet.
10. Study the amino acid sequences of the same protein taken from four different species of plants. Which pair of plants is most closely related?
Species 1: -A-P-A-C-W-
Species 2: -G-P-G-S-F-
Species 3: -A-P-A-C-F-
Species 4: -N-K-M-H-H-
Incorrect answer A. Species 2 and 4
Correct answer B. Species 1 and 3
Incorrect answer C. Species 3 and 4
Incorrect answer D. Species 1 and 2
don't even say i'm right cause I know I am tf i'm not stupid.
I agree with your first answer. However, I think a better answer for the second question is c.
http://www.enchantedlearning.com/subjects/dinosaurs/dinofossils/Fossilhow.html
Yes, it is C. My lesson also said that most organisms are completely decomposed and leave nothing behind.
Amerie is 100% but is careful bc my test were split into 2 different halves
yes it is c I had this test
Traits are passed to offspring through genes.
For the first question, the answer is d. Traits that make an organism more beneficial to humans are favored.
To arrive at this answer, it helps to understand the difference between artificial selection and natural selection. Artificial selection is when humans choose certain traits in organisms and selectively breed them to produce offspring with those desired traits. In artificial selection, humans act as the selective agent and choose which traits are passed on.
On the other hand, natural selection occurs in nature without human intervention. It involves the process of organisms with advantageous traits being more likely to survive, reproduce, and pass on those traits to the next generation. Natural selection is driven by environmental factors and survival advantages.
In the context of the given question, artificial selection can involve choosing traits that are specifically beneficial to humans, such as crops with better yields or animals with specific characteristics desired for agriculture or domestication. This artificial selection based on human preferences is not observed in natural selection.
For the second question, the answer is c. Most organisms die and decompose without leaving any fossil remains.
Fossils are the preserved remains or traces of past organisms found in rocks. However, not all organisms become fossilized. The process of fossilization is quite rare and requires specific conditions.
Organisms that have a hard exterior like shells or skeletons are more likely to be preserved as fossils. Soft-bodied organisms are less likely to leave fossil remains because their bodies decompose more quickly after death. Additionally, not all environments are suitable for fossil preservation.
Therefore, the most likely reason why fossils of some extinct organisms have been found while others have not is that most organisms simply die and decompose without leaving any fossil remains, as stated in answer choice c.