Biology Starr

Based on the cladogram, the ancestral species most likely had...

• a vertebral column

• a vertebral column and hair

• sharp teeth and retractable claws

• ability to purr

Answer explanation

Ancestral = oldest species that gives rise to the rest of the species. The ancestral species would lie to the far left, where only the vertebral column is.

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

NGSS.HS-LS4-4

Eukaryotic cells have ​ (a)   and DNA in the ​ (b)   . Prokaryotic cells have ​ (c)   and DNA in the ​ (d)   .

• membrane-bound nuclei or organelles

• nucleus

• NO membrane-bound nuclei or organelles

• cytoplasm

Tags

NGSS.MS-LS1-1

For an enzyme to be able to catalyze a reaction, the active site must -

• cause the enzyme to be destroyed in the reaction

• increase the activation energy level

• be occupied by an inhibitor

• have a complementary shape to the substrate

Overfishing is when fish are caught faster than they can reproduce, causing the decline of fish populations. Overfishing ​ (a)   the stability of the ecosystem by ​ (b)   .

• increases

• disrupting food chains

• decreases

• increasing competition for limited resources

• allowing prey populations to overproduce

Tags

NGSS.HS-LS2-6

NGSS.HS-LS2-7

NGSS.HS-LS4-5

Snowshoe hares change coat color during the year. In the summer, when there is no snow on the ground, their coat is brown. In the winter when there is snow, their coat is white. Which describes the genetic basis for seasonal changes in coat color?

• The snow causes mutations in the genes

• The genes are regulated by hormone signals that are altered by changes in the environment

• Sunlight causes cancer cells to develop

• The genes are deleted during the summer

Tags

NGSS.MS-LS1-5

NGSS.MS-LS4-4

Two plants are grown together for a time and then separated. Plant 2 is a parasite of Plant 1. Which graph depicts the growth of Plant 1 and Plant 2 during the experiment?

• 
• 
• 
• 

Tags

NGSS.HS-LS2-6

When multiple transitional fossils are found in many rock layers, they provide evidence of -

• seasonal variation in the diet of a species

• gradual change of a species over time

• DNA functioning as the genetic material of organisms

• an unchanging environment

Answer explanation

transitional = CHANGE. Look for the answer choice talkig about change occurring.

Tags

NGSS.MS-LS4-1

Match the following

• organism that lives and feeds on another organism for food

• enzyme

• region of an enzyme where reactants bind

• parasite

• speed up

• active site

• changing from one state to another

• transition

• proteins that speed up chemical reactions

• catalyze

Cellular respiration takes in ​ (a)   and spits out ​ (b)   .

• chemical energy

• light energy

Tags

NGSS.HS-LS1-7

Cyclins signal cells to progress through stages of cell replication. Uncontrolled production of cyclins will most likely result in...

• the formation of haploid cells

• transfer of cyclins to other cells

• formation of tumors

• death of the cell