Ecological Succession
Primary succession occurs in an area that has
No soil
The smallest structural and functional unit of an organism is a/an
cell
Genetic variation occurs in what type of reproduction?
sexual reproduction
The cell elongates and the chromosomes move toward the poles during this stage
Anaphase
Chromosomes carry _____________ which express specific traits
genes, DNA, chromosomes, all of them
all of them
The third trophic level is occupied by ____________
Tertiary consumer
What is an example of an area that is likely to undergo secondary succession
Plants die from drought and decompose
Fire happens
Which is not true of Meiosis?
'The genetic offspring are exactly like the parent cell
There are 23 chromosomes from each parent
Meiosis goes through 2 stages of division, Meiosis 1 and 2
The genetic offspring are exactly like the parent cell.
How many chromosomes are present in the human cell nucleus?
46 or 23 pair
The stage in mitosis in which chromosomes replicate themselves
Interphase
On a Punnett square two capital letters indicate a gene which is ___________
Homozygous dominant
Animals breathe out ___________ and breathe in ________
What is the main difference between primary succession and secondary succession?
Primary begins without soil; Secondary begins with soil
This part acts like the brain of the cell.
Nucleus
This contains chromosomes, genes, DNA
Nucleus
The chromosomes line up in the middle of the cell during this stage
Metaphase
Probability in genetics is expressed in
percentages
If all bacteria on the earth were eliminated, why would all other living things die off?
Bacteria decompose dead organisms which recycles nutrients
The number of individuals a habitat can sustain with the resources it has available
Carry Capacity
These are the basic building blocks of all living things
DNA, cells, genes, chromosomes
The stretch of DNA with instructions for one trait
Genes
Molecule that carries the genetic instructions for all living organisms
DNA
The correct word equation for cellular respiration
oxygen + sugar = carbon dioxide + water + energy
Organisms which are able to make their own food are called
producers
Which of the following is NOT a pioneer species? shrubs, mosses, lichen, fungi
shrubs
In Meiosis II the cell division begins with how may daughter cells?
two daughter cells
Half of these come from one parent and half come from the other parent
Genes
These structures become tightly packed during cell division
Chromosomes
Describes all the locations in which life can exist
A step- by- step sequence with only ONE path showing the relationship between organisms that feed on each other starting with a food source such as plants is called
food chain