Question

Which of the following are the primary predictors of biome type?

	A.	longitude and soil type
	B.	availability of solar energy and precipitation
	C.	altitude and longitude
	D.	salinity, availability of light, dissolved oxygen, water depth, temperature, pH, and presence or absence of waves or currents
	E.	b and/or d, depending upon whether you’re talking about terrestrial or acquatic biomes

1. Which of the following may be used as a skeletal element for structural support and transmission of muscle-generated force?

   	A.	chitin
   	B.	bone
   	C.	coelomic fluid
   	D.	cartilage
   	E.	Animal skeletons may consist of any of the above.

1. All of the following are evolutionary trends in the development of nervous systems for bilaterally symmetrical animals except

   	A.	a decreased number of neurons.
   	B.	concentration of neurons.
   	C.	specialization of function.
   	D.	increase in integration of neurons.
   	E.	cephalization.

1. The noncellular waxy layer of a leaf secreted by the epidermis over its surface is called

   	A.	lignin.
   	B.	cuticle.
   	C.	periderm.
   	D.	cellulose.
   	E.	trichome.

1. Which of the following is a mechanism of phloem transport in which dissolved sugar is moved by means of a pressure gradient that exists between the source and the sink?

   	A.	pressure-flow
   	B.	tension-cohesion
   	C.	root pressure
   	D.	active transport of potassium ions into guard cells
   	E.	guttation

Answer 1

Question 1

A biome is an ecological area that has a particular flora and fauna based upon the climatic condition, temperature, salinity, sunlight, latitude, humidity, etc.

Option A:- Incorrect

Reason:- Longitude is not a key parameter to determine biome

Option B:- Correct

Reason:- Precipitation and availability of solar light are key parameters that determine biome.

Option C:-Incorrect

Reason:- Latitude/altitude determines the biome of an ecological area. For example area at higher latitudes are usually colder than the low latitude areas. But longitude plays no role in determining the biome.

Option D:- Correct

Reason:-Temperature, soil, amount of solar energy, salinity, pH, dissolved oxygen, etc determine the local flora and fauna that live in the biome.

Option E:-Correct

Reason:-Both options B and D are correct. These parameters are used to determine biome based upon the type of ecosystem, land aquatic, etc.

Question 3

Option A:- Correct

Reason:-With an increase in complexity in the animal kingdom and development of the nervous system in bilaterally symmetrical animals the number of neurons in the central nervous system significantly increases in order to conduct information to each and every part of the body.

Option B:- Incorrect

Reason:- It is one of the major events contributing to the evolution of the nervous system in bilaterally symmetrical organisms.

Option C:- Incorrect

Reason:- Specialisation led to the development and advancement of a particular organ to conduct an impulse, action protention and resting potential. Each and every component of the nervous system has own specific function that led to the evolution of the nervous system and cephalization in the bilateral organisms.

Option D:- Incorrect

Reason:- Increase in the integration of neuron and nerve cells led to the conduction of the impulse and signals throughout the body. The human central nervous system has approximately 86 billion neurons cells that integrate with each other forming the entire nervous system.

Option E:- Incorrect

Reason:- Cephalisation led to the development of the brain and central nervous system.

Question 4

Option A:-Incorrect

Reason: It is a composition of the cell walls in woody plants. It provided rigidity and strength to the plant/tree.

Option B:-Correct

Reason:-Cuticle forms a waxy layer called cutin that is impermeable to water.

Option C:-Incorrect

Reason:-It forms a protective covering on the small woody plants and non-woody plants during secondary growth. It is composed of cork, cork cambium and phelloderm.

Option D:- Incorrect

Reason:- It is one of the components that make up the plant's cell wall. It is the most abundant organic molecule on earth.

Option E:- Incorrect

Reason:- These are the small hair-like growth appendages on the plant, algae, etc. They are related to defense against insects and pathogens.