Biology Is Life !

What are five terms for the ONLY cells that contain the monoploid number of chromosomes, and are the ONLY type of cell produced by meiosis?
 

There are several terms for cells produced by meiosis. They could be called, gametes or sex cells. In males, sperm is the gamete produced by meiosis. In females, eggs, also referred to as ovum, or ova, are the gametes produced.

Link

Question: What would happen to an ecosystem if all the decomposers died?
 

nothing would decompose, therefore everything that had perished after the decomposers had been gone would still be there, and basically in perfect condition. (im assuming you mean every single decomposer, including bacteria of decay?)

Click Here


Question: in what organelle does protein synthesis take place?
 

The organelle were protien sythesis takes place is RIBOSOMES.
Click Here
what is natural selection?
 

Natural selection is a process in nature in which organisms possessing certain genotypic characteristics that make them better adjusted to an environment tend to survive, reproduce, increase in number or frequency, and therefore, are able to transmit and perpetuate their essential genotypic qualities to succeeding generations.Click Here

how many cells are in the human body ?
 

change that last Q to name 5 specialized types of cells, tell where each is found, and give a unique characteristic or job for each type.
 

One type: nerve cells- nerve cells are found in the brain, spinal cord, and your nervous system. They transmit synapsis.
Second type: Skin cells- skin cells protect our bodies from allowing harmful substances into them. They are found on the exterior of your body.
Third Type: sex cells- sex cells are found in the sperm of men and the egg of women. They aid in reproduction for humans.
Fourth type: blood cells- blood cells are found in blood. They aid in the transportation of oxygen from the lungs throughout you body.
Fifth Type: endocrine cells- endocrine cells are used to secrete hormones and growth factors. They are found in the endocrine system.

Cells

Question: What is the difference between a prokaryotic cell and a eukaryotic cell?
 

Prokaryotic cells lack a membrane-bound nucleus. They have a few internal structures that can be seen under the microscope. Bacteria are prokaryotes. Eukaryotic cells on the other hand do not have a membrane-bound nucleus. Also instead of having chromosomal DNA, their genes are in a circular loop. Prokaryotic cells also have three different shapes: rod shaped, spherical, and spiral. And instead of going through replication, prokaryotes divide by binary fission.
prokaryotic cells vs. eukaryotic cells

Why is biodiversity important in an ecosystem?
 

hey ceeattle... i think you mean that eukaryotic cells DO have a membrane bound nucleus... just like you (you cells are eukaryotic cells... spell that you-carry-otic cells)

:)
hj
 

biodivrsity is the differences in life.
it is important because it improves ecosystem productivity.

http://www.globalissues.org/EnvIssues/Biodiversity.asp

what is a niche
 

A nich is a term for describing the relational position of a species or population in its ecosystem.

i found my answer at Click Here

my question is what is the difference between asexual and sexual reproduction?
 

yo nach...you write "a term for describing the relational position of a species or population in its ecosystem"... could you explain that IN YOUR OWN WORDS.
:)
 

Asexual reproduction results in two identical cells from the parent. sexual reproduction results in an organism that is simliar but no identical to the parents.


Click Here IF YOU DARE!!!

question:If the world a sploded how will this affect the ecosystem?
just kidding
REAL question: What are the factors that create variance?
 

The cause of variation is genetic (that is, inherited), environmental, or more usually a combination of the two. Some variation is the result of the environment modifying inherited characteristics. The origins of variation can be traced to the recombination of the genetic material during the formation of the gametes, and, more rarely, to mutation.

Click Here

What is transcription and what is it used for?
 

transciption is when a DNA strand strips apart to creat a strand of messenger RNA. the DNA strand then zips back togetther, the MEssenger RNA then exits the nucleus and heads to a ribosome .

My Question: what are the three layers formed during the differentiation stage and what do the 3 layers eventually form?
 

Three layers formed during the differentiation stage are the mesoderm, ectoderm, and endoderm. The mesoderm eventually gives rise to bone and muscle, the ectoderm forms skin and the nervous system, and the endoderm forms the digestive system.


My QUESTION: What does synthesize mean????
 

tink!
i had a hard time finding something bout synthesize but i did fine stuff on synthesis i hope that is wut you ment if not sry.

Synthesis is when two existing elements combine to form something new
linky

what effects the activities or an enzyme???
 

tink again

that seems really short so heres a lil more.
some examples are Photosynthesis, dehydration synthesis, and biosynthesis.

heres my question again w/o typeo's
what effects the activities of an enzyme???
 

embryos of men and woman have simmilar body parts. i is the effect of genes, the Y chromosome and testorone that brings about the changes from a male to a female. because nipples are there before this process this they stay.
did you know that men can even produce milk...weird
link

how and when are mutations passed onto an organisms offspring?
 

The offspring will only be affected by a mutation if the parent's DNA has that mutation. It will not inherit a mutation that occured because of the environment (skin cancer) unless the mutation occured within the DNA. It occurs when the offspring is produced.

List the life functions and describe the jobs they do.
 

Here are the five basic life functions in order for an organism to stay alive.
Respiration - the ability to convert food into energy
Regulation - the ability to maintain a stable internal environment(maintain homeostasis)
Reproduction - the ability to produce more of their own kind (not needed for the individual organism survive)
Growth - the ability to increase in size
Excrete - the ability to remove metabolic wastes (Carbon Dioxide,Water&Urea)
Nutrition - the ability to obtain and process food (Autotrophic or Heterotrophic)
Transport - the ability to move materials into, out of and throughout an organism
Synthesis - the ability to manufacture materials not able to be gotten from the environment
life functions

Q. What's the difference between mitosis and meiosis?
 

Mitosis is the usual method of cell division, characterized typically by the resolving of the chromatin of the nucleus into a threadlike form, which condenses into chromosomes, each of which separates longitudinally into two parts, one part of each chromosome being retained in each of two new cells resulting from the original cell. Meiosis is the part of the process of gamete formation, consisting of chromosome conjugation and two cell divisions, in the course of which the diploid chromosome number becomes reduced to the haploid.

Mitosis Site
Meiosis Site

QUESTION: Define Community, Population, and Ecosystem.
 

good morning
on this hot humid saturday
w/ 6 class days to go
:)
hj
 

Community: all the populations in one area.

Population: all of one species in an are

Ecosystem: all of the living and nonliving things in an area.

hey johnson! sorry I'm late. meant to do it last night but I was sick and couldn't sit up to do it =[
 

hey mr j, sorry this is late but all the times my computer has broken it finally crashed and we didnt get it fixed until today =[
hope you can accept it !!

Okay pamm did not ask any questions after her blog response so i am going to answer one of my own questions and make up another.

my question is what is the difference between a diploid and haploid cell because i always get those mixed up, and are there any synonyms for those words.

This site tells me that a haploid is the number of chromosomes in a gamete and can also be referred to as monoploid when talking about humans. Diploid are the full number of chromosomes in an organisms cells. Now i will hopefully remember those terms.

My question is why do human brain cells carry out different jobs that muscle cells, and how do they know what jobs to carry out?
 

the question is why do human brain cells carry out different jobs that muscle cells, and how do they know what jobs to carry out?

when the cells are asexually reproduced they take the same jobs as the parent cells.

again i am the last person to do this blog
 

http://www.enchantedlearning.com/subjects/anatomy/brain/Neuron.shtml
here is my website