5 short multiple-choice questions that I have been stuck on for half an hour now!! PLEASE HELP ME!!!!! :(

Directions: Read and understand each question very well. Write the letter on a separate sheet of paper. 1. Which of these explai

tresset_1 [31]

Answer:

1.

1.D

2.D

3C

4.theres no picture so i am not sure what to answer,youre on your own here, just read and research about it on ur module or in the internet, u can do it:D

5.B

6.A

7. the choices arent very clear in what you copy and paste here but the answer is, revolution of the earth around the sun and the earth tilting on its axis or "rotation"

Explanation:

HOPE IT HELPS<3

KEEP LEARNING BUD

5 0

2 years ago

Which of the images below depicts a healthy reef ecosystem? Image A, B, C, or D?

ANTONII [103]

Answer:

A is the answer i think because it has more reef

6 0

2 years ago

Five different species of warblers, seed-eating birds, live in the same species of conifer trees. All of the birds migrate to co

sashaice [31]

Answer:

both c and d are pretty accurate, but i dont have very much knowledge on warblers specifically. but those 2 answers would be the most common for such a case

Explanation:

5 0

3 years ago

Which of the following is a good predictor of biodiversity in terrestrial ecosystems?

finlep [7]

The correct answer is - predator species in a community.

In the terrestrial ecosystems, a very good and usually sure predictor of the biodiversity is the existence of a predator species. The more predator species there are, the higher the biodiversity, and vice versa, the less predator species, the lesser the biodiversity.

The reason why the predators are such a good predictor of the biodiversity is that they are the species that are on the top of the food chain. That means that the predators are dependent for their survival on all the other species bellow them in the food chain, which is pretty much all species apart from themselves.

If a predator is present, than there has to be pray. If there's pray, omnivores and herbivores, than there has to be plants. All of the organisms are connected to one another, and the ones on the top of the food chain are the most dependent on the others, thus their existence usually means a healthy ecosystem with higher biodiversity.

4 0

3 years ago

Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing sel

aliina [53]

Answer:

Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing selection

The Answer is option A (Disruptive selection)

Explanation:

Selection can either shift the mean value of a trait, reduce the trait's variation, or increase its variation.

Genetic variation which allows natural selection to increase or decrease frequency of alleles already in the population is a source of phenotypic variation as it refers to differences in all the hereditary information of members of the same species.

Disruptive Selection is important in maintaining variation and initiating speciation as it Increases Variation by favoring alleles corresponding to more extreme phenotypes. But for it to occur, the mean phenotype has to experience the lowest fitness. Disruptive selection affects the frequency distributions of alleles and genotypes within a population.

Disruptive selection is based on the variance of a trait in a population as it increases genetic variance by equalizing the frequencies of existing alleles at polymorphic loci (a genetic loci with two or more alleles). Disruptive selection maintains and may even increase variation in natural populations by favoring extreme phenotypes, individuals with extreme values for a trait have greater reproductive success than individuals with intermediate values.

7 0

3 years ago