Which of the following is the primary female sex hormone?

A. Estrogen

B. Testosterone

C. Progesterone

D. Androgen

What part of the brain will release relatively high amount of hormones that will initiate the start of sexual maturity?

A. Pituitary gland

B. Hypothalamus

C. Cerebrum

D. Cerebellum

How will you explain why men produced higher levels of testosterone than women?

A. Testosterone plays an important role in male traits and reproductive activity

B. Testosterone plays an important role in female traits and reproductive activity

C. Testosterone is necessary for normal sexual development of females.

D. Testosterone is produced only by male body for sexual maturity.

Which of the following roles of hormones explains the changes in the physical appearance of the external genitalia of the male and female reproductive part in the onset of puberty?

A. Stimulation of follicle

B. Production of sperm and egg cell

C. Regulation of the production of GnRH

D. Development of male and female secondary sex characteristics

Which of the following hormones stimulates the pituitary gland to release Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH)?

A. Luteinizing Hormone

B. Progesterone

C. Estrogen

D. GnRH

Ecosystem stability is defined as:

A. The resilience to withstand changes that may occur in the environment.

B. An introduction of invasive species in the new environment.

C. Acquiring a set of traits for non-extinction.

D. A variety between all species of plants, animals, and microorganisms.

Amorseko is a grass used for grazing and for control of soil erosion. It produces prickly spikelets seeds that sticks to animal skin, hair, or clothing. Such adaptation is favorable because it _______________.

A. prevents germination within the seed pods.

B. causes genetic changes to occur.

C. attracts insects that aid in pollination.

D. aids in the dispersal of the species.

Adaptation is an organism’s way to survive its changing environment. Which of the following is NOT an adaptation?

A. The finches in Galapagos have different beaks

B. The death of dinosaurs during the Cretaceous Period

C. A child learning to walk on his own

D. A certain group of birds eating different kinds of food

Davao is known for its wide variety of fruits, and other plant species that makes it more attractive to tourists. Which of the following classifications of the value of biodiversity is described?

A. Indirect Economic value

B. Direct Economic value

C. Aesthetic value

D. Both A and C

The Philippines is one of the 18 mega biodiverse countries. Which of the following is the MAIN criterion to qualify a country as megadiverse?

A. High species diversity and large percentage of endemic species.

B. Have marine ecosystems within its borders.

C. Have at least 5,000 species of endemic plants.

D. Presence of tropical rainforest ecosystem.

A French naturalist, Jean Baptiste de Lamarck proposed that organisms evolved in response to the environment. Which of the following Lamarck’s theory explains the disappearance of snake’s leg because it does not need to walk narrow spaces?

A. Theory of Need C. Theory of Natural Selection

B. Theory of Use and Disuse

C. Theory of Natural Selection

D. Theory of Acquired Characteristics

Which of the following are examples of animals with homologous structures?

A. Wings of butterfly and bat

B. Flipper of whale and forelimb of cat

C. Fingers of human and arm of starfish

D. Tongue of frog and proboscis of a mosquito

In what era can the oldest fossil be found?

A. Cenozoic Era

B. Mesozoic Era

C. Paleozoic Era

D. Pre-Cambrian Era

Which of the following statements BEST describes why fossil is good evidence of evolution?

A. It allows us to see extinct organisms and compare them to living species.

B. We can see how organisms develop over a period of time.

C. Fossil gives us the idea of where an organism lives.

D. Fossils will tell what animals eat.

Where can we find most of the fossils?

A. Black Soil

B. Granite Rock

C. Lava Flows

D. Sedimentary rock

Identical twins were born with genes for a genetic disorder that can be controlled by diet. Both twins were placed on this diet, which excludes a certain amount amino acid. However, one twin chose not to follow the diet and developed the genetic disorder. The other twin followed the diet and did not develop the disorder. What does the difference between the twins show?

A. Gene expression is not influenced by biochemical factors

B. Identical twins do not always have the same genotype.

C. Gene expression is influenced by the environment.

D. The genetic disorder is inherited by identical twins only.

A strand of a DNA molecule shows the following base sequence: A-A-T-G-C-C-A-G-T-G-G-

During translation, what would be the tRNA sequence of nucleotides arranged linearly?

A. T-C-G-T-C-C-G-T-C-T-A-G

B. A-A-U-G-C-C-A-G-U-G-G-U

C. A-G-C-A-G-G-C-A-G-A-U-C

D. U-C-G-U-C-C-G-U-C-U-A-G

A strand of a DNA molecule shows the following base sequence: A-A-T-G-C-C-A-G-T-G-G-T

If transcribed into mRNA, what would be the resulting strand?

A. U-U-A-C-G-G-U-C-A-C-C-A

B. A-G-C-A-G-G-A-G-A-T-C-A

C. A-G-C-A-G-GC-A-G-A-U-C

D. T-C-G-T-C-C-G-T-C-T-A-G

A strand of a DNA molecule shows the following base sequence: A-A-T-G-C-C-A-G-T-G-G-T

If this strand is replicated, which of the following is the complementary strand that is produced?

A. T-C-G-T-C-CG-T-C-T-A-G

B. A-G-C-A-G-GC-A-G-G-G-T

C. T-T-A-C-G-G-T-C-A-C-C-A

D. U-C-G-U-C-C-U-C-U-A-G-A

Which of the following is NOT involved in translation?

A. mRNA

B. tRNA

C. rRNA

D. DNA

Which of two processes are involved in protein synthesis?

A. replication and mutation

B. transcription and translation

C. substitution and inversion

D. duplication and deletio

The number of guanine bases in DNA molecule is equal to which nitrogenous base?

A. adenine

B. thymine

C. uracil

D. cytosine

Which of the following serves as the template for the assembly of amino acids during protein synthesis?

A. DNA

B. mRNA

C. rRNA

D. tRNA

Which would explain why DNA is often referred to as the code of life?

A. It has a double helix structure.

B. Its molecule is made up of phosphate, sugar and a base.

C. Its molecule is packed into chromosomes.

D. It contains the information needed to make proteins