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NEW QUESTION # 25
In a multigeneration family study,8% of malesandfar fewer femalesshow a trait (e.g., red hair). What is the most likely cause?
- A. Autosomal inheritance
- B. Sex-linkedinheritance
- C. Environmental influence
- D. Non-somatic inheritance
Answer: B
NEW QUESTION # 26
Which statement correctly describes the flow of information duringgene expression?
- A. RNA is formed from DNA, then protein is formed from RNA
- B. RNA is formed from protein, then DNA is formed from RNA
- C. DNA is formed from RNA, then protein is formed from DNA
- D. DNA is formed from protein, then RNA is formed from DNA
Answer: A
NEW QUESTION # 27 
Using theTetrapod Cladogram (Node E)and standard vertebrate traits, whichtwo character statesare shared byboth Tiger and Gorilla?(Choose 2 answers)
- A. Fur
- B. Three middle ear bones
- C. Loss of tail
- D. Jaw
Answer: A,B
NEW QUESTION # 28
A subatomic particle has a relative mass of 1, isuncharged, and is located in thecenter(nucleus) of the atom.
What is this particle?
- A. Electron
- B. Orbit
- C. Proton
- D. Neutron
Answer: D
NEW QUESTION # 29
Which is an example of acovalent bond?
- A. One hydrogen atom transfers its electron to another atom
- B. A weak electrostatic attraction holds two hydrogen atoms together
- C. Two hydrogen nuclei fuse to form a single molecule
- D. Two hydrogen atoms each share their single electrons with one another
Answer: D
NEW QUESTION # 30
Individuals of two distinct squirrel species live on the same campus and forage on similar foods year-round.
What relationship is this an example of?
- A. Competition
- B. Herbivory
- C. Predation
- D. Commensalism
Answer: A
NEW QUESTION # 31
Which organisms havefour limbsand produceeggs that are not amniotic?
- A. Amphibians
- B. Sharks and rays
- C. Birds
- D. Crocodilians
Answer: A
NEW QUESTION # 32
Which comparison ofDNA and RNAis correct?
- A. DNA is single-stranded; RNA is double-stranded.
- B. DNA uses uracil; RNA uses thymine.
- C. DNA is a monomer; RNA is a polymer.
- D. DNA stores hereditary information; RNA is used to make proteins.
Answer: D
NEW QUESTION # 33
Which type of cell division has onlyone division per cycle?
- A. Mitosis
- B. Interphase
- C. Meiosis
- D. Prophase
Answer: A
NEW QUESTION # 34
During which stage of meiosis dohomologous pairsof chromosomesseparate from each other?
- A. Anaphase I
- B. Metaphase I
- C. Anaphase II
- D. Metaphase II
Answer: A
NEW QUESTION # 35
Arctic foxes sometimes follow polar bears and scavenge leftovers after the bears finish eating. What interaction occurs?
- A. Parasitism
- B. Herbivory
- C. Predation
- D. Commensalism
Answer: D
NEW QUESTION # 36
Which list containsonly bioticfactors?
- A. Soil, sunlight, frog, tree
- B. Wind, sunlight, fern, frog
- C. Frog, butterfly, fern, tree
- D. Soil, frog, butterfly, fern
Answer: C
NEW QUESTION # 37
What is thefunction of the centromereduring M phase?
- A. Copying the chromosomes
- B. Holding sister chromatids together until they separate to move to opposite poles
- C. Pushing each sister chromatid to one of the poles
- D. Keeping chromosomes condensed and packaged during cell division
Answer: B
NEW QUESTION # 38
The humanMN blood groupis determined by two codominant alleles (MandN). In one family,alloffspring are MN. What are themost probable genotypesof the parents?
- A. MM and MN
- B. MN and MN
- C. MM and NN
- D. NN and MN
Answer: C
NEW QUESTION # 39
The leopard seal is part of an Antarctic food web. It feeds oncod, which feed on small aquatic plants. Based on the energy transfer in the exhibit, how much energy does the leopard seal receive by feeding on cod?
- A. 60 KJ
- B. 5,400 KJ
- C. 540 KJ
- D. 600 KJ
Answer: D
NEW QUESTION # 40
(Use the exhibit "Simple Diffusion (No ATP)".) What process is depicted?
- A. Simple diffusion, which does not require energy
- B. Facilitated diffusion, which requires energy
- C. Active transport, which does not require energy
- D. Osmosis, which requires energy
Answer: A
NEW QUESTION # 41
A wildlife biologist studies how lions and zebras interactandhow physical factors (temperature, water) affect them in the Serengeti. Which level of ecological organization is being studied?
- A. Ecosystem
- B. Population
- C. Biosphere
- D. Community
Answer: A
NEW QUESTION # 42
Which chromosomal set shows an abnormality most commonly associated with agenetic disorder?
- A. XYY
- B. Trisomy21
- C. Trisomy18
- D. XX
Answer: B
NEW QUESTION # 43
A student notes thatclub mossesform an outgroup, whileferns, gymnosperms, and flowering plantsform an ingroup on a plant cladogram (algal ancestor at the base). Whichbranching pointis the student considering?
- A. Leaves with branching veins
- B. Vascular tissue
- C. Embryo protection
- D. Seeds
Answer: A
NEW QUESTION # 44
What is a primary characteristic ofperipheral membrane proteins?
- A. Weak intermolecular forces keep them attached to the lipid membrane.
- B. They cannot be post-translationally modified.
- C. They span the entire lipid bilayer, sometimes multiple times.
- D. Detergents or nonpolar solvents are necessary to remove them from the membrane.
Answer: A
NEW QUESTION # 45
Ocean acidification dissolves calcium-based exoskeletons of purple sea urchins. Some individuals have a trait making their exterior more acid-resistant. If acidification increases, how is this population most likely to evolve?
- A. Longer, more rigid spines become more common
- B. Acid-resistant exoskeletons become more common
- C. Less acid-resistant exoskeletons become more common
- D. Shorter, more flexible spines become more common
Answer: B
NEW QUESTION # 46
Which statement istrueofmeiosis?
- A. The daughter cells produced are somatic cells.
- B. The daughter cells produced are diploid.
- C. A cell undergoestwo divisionsduring meiosis.
- D. Meiosis results in two daughter cells.
Answer: C
NEW QUESTION # 47
In a pond ecosystem, mosquito larvae feed on photosynthetic algae; dragonfly larvae feed on mosquito larvae; fish eat dragonfly larvae; raccoons eat fish. What is the producer in this ecosystem?
- A. Dragonfly larvae
- B. Mosquito larvae
- C. Algae
- D. Fish
Answer: C
NEW QUESTION # 48
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