LEAP 2025 Biology Post Test

### LEAP 2025 Biology Post Test Sample

Standard: HS-LS-1-1 DOK: 1 1pt
1.

Part A Look at the pictures below. These images are steps in the process of protein synthesis. Choose the answer that has the correct order needed to make a protein.

Standard: HS-LS-1-1 DOK: 1 1 pt
.

Part B Drag the label for each step, listed below, into the correct box

 $↓$ Drop answer here $↓$ Drop answer here $↓$ Drop answer here $↓$ Drop answer here

DNA double helix

Translation

mRNA strand

Transcription

Use the information and the graphs to answer questions 7 through 8.

A study conducted on two species of mangrove plants, Avicennia schaueriana and Laguncularia racemosa shows differences in morphology and adaptation between the species. Mangroves exist in an ecosystem that is subject to variations in salinity, tide, and nutrients. A. schaueriana and L. racemosa exist in salt marsh and riverside mangrove ecosystems. These plants show poorer development near salt marshes than plants of the same species near riverside habitats. Mangroves favor riverside habitats and develop more fully near them.

Scientists further found that there were genetic distinctions among A. schaueriana plants near salt marsh and riverside habitats but none among L. racemosa near the same habitats. Scientists speculate genetic drift and gene flow influence the genetic variations of the ecosystems within the two habitats.

Standard: HS-LS-3-3 DOK: 2 1 pt
7.

Select the correct answer. As part of the study, scientists measured the number and length of roots among the two mangrove species mentioned. What can the scientists conclude about root diversity among the mangroves?

Standard: HS-LS-2-1, HS-LS-4-4, HS-LS-4-5 DOK: 2 1pt
8.

Select the correct answer from the dropdown menu to complete the sentence.

Genetic drift is one method of speciation influencing the diversity of mangrove roots. L. racemosa roots are similar between salt marsh and riverside habitats because of

Standard: HS-LS-1-5 DOK: 1 1 pt
12.

Use your scientific knowledge and the diagram to answer the question. Drag the correct answer into each box to show the processes of photosynthesis.

Light

Sugars

ATP

Light dependent reactions

Calvin Cycle

O2

Standard: HS-LS-2-4, HS-LS-2-6 DOK: 2 1 pt
30.

Use the graph and your scientific knowledge to answer the question. Select the correct answer to complete the sentence. From 2006 to 2012, –

Standard: HS-LS-2-4 DOK: 1 1 pt
33.

Select the correct answer. Which organism in the food chain has the greatest amount of energy available to it?

Standard: HS-LS-3-1 DOK: 2 1 pt
36.

A botanist crossed a yellow (YY) orchid flower with a blue (BB) orchid flower. The resulting offspring had green (YB) flowers. The green flowers were crossed as show in the Punnett square below.

Part A

Drag the correct genotype of the F2 generation into each box to complete the Punnett square.

YB

yb

YY

yy

YB

bb

BB

Standard: HS-LS-3-1 DOK: 2 1pt
.

Part B

Select the correct answer from each dropdown menu to complete the sentence to indicate the expected percentage of offspring with each phenotype resulting from the cross shown in the Punnett square. The expected phenotype percentages of offspring are

% blue

1pt
.

% yellow

1pt
.

% green