Biology

The activity of ptyalin is likely to decrease with an increase in the concentration of?

A. oxygen B. starch C. protein D. acid Correct Answer: Option D - acid Explanation: Ptyalin operates best in alkaline…

5 years ago

The function of the red head in male Agama lizards is to?

A. scare other males from the territory B. warn predators of the distastefulness of the animal C. attract female lizards…

5 years ago

The ability of chemelon to change its colour rapidly is an adaptation for?

A. obtaining food B. attraction mate C. communication D. escaping detection Correct Answer: Option D - escaping detection

5 years ago

Which of the following can cause shrinkage of living cells?

A. Deionized water B. Hypotonic solution C. Isotonic solution D. Hypertonic solution Correct Answer: Option D - Hypertonic solution

5 years ago

The movement response of a cockroach away from a light source is?

A. negative phototaxism B. positive phototaxism C. negative phototropism D. positive phototropism Correct Answer: Option A - negative phototaxism

5 years ago

The theory of natural selection was postulated by?

A. Gregor Mendel B. Matthias Schleiden C. Charles Darwin D. Robert Hook Correct Answer: Option C - Charles Darwin

5 years ago

The theory of use and disuse of organs was promulgated by?

A. Alfred Wallace B. Charles Darwin C. Jean Lamarck D. Robert Hook Correct Answer: Option C - Jean Lamarck

5 years ago

A collection of population of all living organisms that exist in a habitat is referred to as?

A. niche B. ecosystem C. community D. environment Correct Answer: Option C - community

5 years ago

The micro-organisms that causes Typhoid disease is?

A. Trypanosome gambiense B. Salmonella typhi C. Entamoeba histolytica D. Plasmodium sp Correct Answer: Option B - Salmonella typhi

5 years ago

The type of asexual reproduction that is common to both Paramecium and Protists is?

A. fragmentation B. budding C. sporulation D. fission Correct Answer: Option D - fission

5 years ago