What species of female mammal lacks a uterus and vagina?
Options:
- (A) fallopian tubes
- (B) echidna
- (C) live birth
- (D) lays eggs
- (E) cows
- (F) tortoises
- (G) alpacas
- (H) goats
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Let's think first: Female monotremes lack a uterus and vagina. Examples of monotremes are the Platypus and Echidna. Platypus and echidna lack a uterus and vagina.... So the answer is [(B)]

What do cells make up of organisms?
Options:
- (A) structure only
- (B) function only
- (C) structure and function
- (D) members of their own species
- (E) Something that is self-aware
- (F) share properties
- (G) desires and needs
- (H) Most plants
--
Let's think first: Cells are the basic units of the structure and function of living things. An organism is a living thing or something that was once alive. Cells are the basic units of the structure and function of organisms.... So the answer is [(C)]

When do platyhelminthes reproductive organs develop?
Options:
- (A) when they become adults
- (B) It helps them survive
- (C) produce offspring
- (D) By wind and rain
- (E) during the day
- (F) members of their own species
- (G) an area swollen with pus
- (H) Something coming from a gland
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Let's think first: Adult worms go through a major transformation to develop reproductive organs. Marine flatworms belong to a major group of worms called the Platyhelminthes. Adult platyhelminthes go through a major transformation to develop reproductive organs.... So the answer is [(A)]

Where is force on the vessel walls highest?
Options:
- (A) arteries
- (B) feet
- (C) resistance
- (D) tibial vein
- (E) strong
- (F) capillaries
- (G) femoral vein
- (H) Summer
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Let's think first: Blood pressure is highest in arteries and lowest in veins. What is Blood Pressure Blood pressure is the pressure on the blood vessel walls. Force on the vessel walls is highest in arteries and lowest in veins.... So the answer is [(A)]

What are the form of the genetic material of a cell during mitosis?
Options:
- (A) chromosomes
- (B) graptolites
- (C) fur and fat
- (D) peachleaf willow
- (E) pollen
- (F) Leptospirosis
- (G) animals
- (H) it can be seen
--
Let's think first: Chromosomes are the form of the genetic material of a cell during cell division. Mitosis is cell division. Chromosomes are the form of the genetic material of a cell during mitosis.... So the answer is [(A)]

Energy that comes from body heat can help with
Options:
- (A) recovery
- (B) commuting
- (C) movement
- (D) cooling
- (E) strength
- (F) stay warm
- (G) health
- (H) motion
--
Let's think first: Evaporation of sweat uses energy, and the energy comes from body heat. When sweat is evaporated into the air, it provides additional cooling. Cooling uses energy, and the energy comes from body heat.... So the answer is [(D)]