Biology STAAR 3.1

An illustration of how a particular DNA mutation will most likely affect the polypeptide produced is shown. What type of mutation is illustrated?

• insertion

• translocation

• substitution

• deletion

Answer explanation

The original strand has a GTA coding for His. The mutated strand has a GGA which codes for Pro instead. The T got switched for a G, so this is a substitution.

Tags

NGSS.MS-LS3-1

The DEFENSES of 2 flightless birds that live in different habitats are shown. How do the wings of the Gentoo penguin and the legs of the ostrich provide an advantage in their habitat?

• Allows them to find prey

• Allows them to escape from predators

• Allows them to control body temperature

• Allows them to be camouflaged in their environments

Answer explanation

You can narrow down the answer choices to either "finding prey" or "escaping predators." Note that the question says the birds need DEFENSES and are FLIGHTLESS. Defenses are used to escape predators, not to hunt.

Tags

NGSS.MS-LS4-4

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

• light energy
• chemical energy

Tags

NGSS.MS-LS1-6

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.MS-ESS3-4

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Reorder the following species from oldest to youngest.

• horse

• turtle

• house cat

• wolf

• tiger

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2