LECTURE 01: LIFE AND STUDY OF LIFE

Question 1

WHAT ARE THE PROPERTIES OF LIFE?

Answer 1

1. Metabolism
2. Selective Barriers
3. Response to Stimuli
4. Reproduction
5. Evolution & Adaptation

Question 2

HOW MANY PROPERTIES OF LIFE ARE THERE?

Answer 2

5

Question 3

WHAT ARE THE LEVELS OF BIOLOGICAL ORGANIZATION AND STUDY

Answer 3

1. Molecules
2. Macromolecules
3. Organelles
4. Cells
5. Tissues
6. Organs & Organ Systems
7. Organisms
8. Populations
9. Communities
10. Ecosystems

Question 4

WHAT IS METABOLISM

Answer 4

the transformation of matter and energy

Question 5

WHAT CONFERS THE PROPERTIES OF LIFE TO LIVING THINGS?

(Old Answer)

Answer 5

Life is characterized by a special force (life force) or energy (vital energy).

Life is unitary, substantial thing.

Matter is only living if it possesses this force or energy.

Question 6

WHAT CONFERS THE PROPERTIES OF LIFE TO LIVING THINGS?

(Modern Answer)

Answer 6

Properties of life emerge from the collection of complicated relationships among non-living parts.

life isn’t a substantial thing.

Question 7

WHAT ARE SELECTIVE BARRIERS ?

Answer 7

A barrier that lets some things across but not others.

ex: transport of protein in the membrane

Question 8

EXPLAIN HOMEOSTASIS

Answer 8

Organisms are able to maintain internal conditions that are different from external conditions.

Question 9

Response to Stimuli

Answer 9

Organisms reactions or behaviours in response to environmental changes or external signals.

Question 10

Why is responsiveness to stimuli important?

Answer 10

Ensures the organisms survival, crucial for adapting and the organisms overall functioning.

Question 11

WHAT IS GENETIC TRANSMISSION ?

Answer 11

Process by which genetic information is passed from one generation to the next.

Question 12

WHAT IS A DNA SEQUENCE ?

Answer 12

The order of nucleotides in a DNA molecule. Determining the genetic instructions used in the development, functioning and reproduction.

each sequence has a specific meaning

Question 13

EVOLUTION

Answer 13

The environment is always changing so species have to adapt through evolutionary change.

Question 14

DESCRIBE MUTATION ?

Answer 14

any change to the genetic information of a cell or viruses.

Question 15

ARE MUTATIONS BAD OR GOOD ?

Answer 15

Mutations are bad and good.

Some mutations can be good cause it can lead to better adaptation of an organism.

However they are mostly bad.

Question 16

WHAT IS GENETIC VARIATION ?

Answer 16

variation in the DNA sequence.

Question 17

DESCRIBE SIMILARITY BEYOND FUNCTIONAL

Answer 17

explained only by genetic relationship.

organisms, structures, or systems that may show resemblance that’s isn’t only on their function

Question 18

WHAT ARE MODEL ORGANISMS

Answer 18

a species that a large number of biologists have decided to work on for common benefits.

Question 19

WHAT ARE TWO EXAMPLES OF MODEL ORGANISMS ?

Answer 19

E. coli and Yeast

Question 20

Molecules

Answer 20

a group of atoms bonded together

Question 21

Macromolecules

Answer 21

a very large molecule

Question 22

Organelles

Answer 22

Specialized structure within a cell that performs distinct functions necessary for the cells survival and operation.

Question 23

Cells

Answer 23

basic structural and functional unit of all living organisms

Question 24

Tissues

Answer 24

A group of cells that work together to perform specific functions within an organisms

Question 25

Organs & Organ Systems

Answer 25

self contained structure composed of two or more types of tissues working together to perform specific functions.

Question 26

Organisms

Answer 26

Individuals living entities that can carry out all the essential life processes.

Question 27

Populations

Answer 27

A group of individuals of the same species living in a specific geographic area at a given time.

Question 28

Communities

Answer 28

Different species living and interacting in the same geographic area

Question 29

Ecosystems

Answer 29

Biotic and abiotic organisms interacting as a system, in a defined area.