Question

8th grade science question help!

Answer 1

@Slash1998 @goformit100 @Falco276 @hartnn @satellite73

Answer 2

what events characterizes sexual reproduction regardless of the type of organism

Answer 3

This is for the first question:
Although genetics plays a large role in the appearance and behavior of organisms, it is the combination of genetics with what an organism experiences that determines the ultimate outcome. For example, while genes play a role in determining an organism's size, the nutrition and health it experiences after inception also have a large effect.
Source Wikipedia.

Answer 4

which plant produces seed but not flowers

Answer 5

All of the cells in your body started from a single cell.

That single cell then divided many, many times to turn into the 50 trillion or so cells that make up you. All of the cells in your body share the same DNA as was found in that first cell.

They have the same DNA but not all cells express all parts of the DNA.

Your DNA contains all of the information needed for making you. This information is stored in the over 20,000 human genes found in almost all your cells.

To get at the information, a gene must be turned on (expressed) and the information turned into something useful, a protein. Once made, that protein goes out into the cell and performs some set of specific tasks.

Answer 6

which plant produces seed but not flowers
-Gymnosperms

Answer 7

@thomaster 1:pine tree
2: apple tree
3: dandelion
4: corn plant

Answer 8

Pine trees are gymnosperms

Answer 9

the others all have flowers exept pine tree

Answer 10

if you plant pea seeds in your garden, what do you expect will happen to the seeds?

Answer 11

a pea plant would grow i guess?

Answer 12

how is reproduction in flowering plants similar to reproduction in animals

Answer 13

a seed is to a plant as a zygote is to

Answer 14

@help123please. @thomaster @goformit100

Answer 15

How does the way that the plant embryo gets its food compare with that of the seedling?
PLEASE WHEN ANSWERING STAE THE QUESTION UR ANSWERING! THANKS :0

Answer 16

@Zale101 @Slash1998 @thomaster @goformit100 @help123please. @help123456

Answer 17

i'll try my best to help you out

Answer 18

oh well i hope you get to feeling better

Answer 19

oh:(

Answer 20

1:how is reproduction in flowering plants similar to reproduction in animals
2: How does the way that the plant embryo gets its food compare with that of the seedling?

Answer 21

How does the way that the plant embryo gets its food compare with that of the seedling?:The seed of a higher plant is a small package produced in a flowering plant or gymnosperm containing an embryo and stored food reserves. The seed looks apparently dead. In fact, even with biochemical tests for the metabolic processes we associate with life (respiration, etc.) the rate of these processes is so slow that it would be difficult to determine whether there really was anything alive in a seed. Germination is the resumption of growth of the dormant embryonic plant inside the seed; it implies complex physical and chemical changes that occur as the embryo begins to develop into a young shoot and root (seedling). The germinating seed sends its first root (radicle) into the soil and the first stem with the first leaves (cotyledon) toward the sunlight.
In some definitions, the appearance of the radicle marks the end of germination and the beginning of establishment, a period that ends when the seedling has exhausted the food reserves stored in the seed. These are critical phases in the life of a plant. The mortality between dispersal of seeds and completion of establishment can be so high, that many species survive only by producing huge numbers of seeds. If a seed is not allowed to germinate within some certain length of time, the embryo inside will die. Each species of seed has a certain length of viability, varying from a few weeks up to 2000 years.
A seed will germinate, or sprout, when conditions are right for survival, some seeds require particular conditions before they will germinate, these conditions encompass adequate moisture, heat, and/or light, also some species of seed have particular needs such as the heat of a fire (e.g., many Australian native plants), or soaking in a body of water for a long period of time. When a mature seed is placed under favourable conditions and fails to germinate, it is said to be dormant.
The length of time plant seeds remain dormant can be reduced or eliminated by some simple seed treatments called stratification, vernalization, soaking (imbibition).

Answer 22

3: a seed is to a plant as a zygote is to
1: pine tree
2: bacterium
3: an animal
4: moss plant

Answer 23

can u give a small answer i have two lines only :(

Answer 24

4: How does the way that the plant embryo gets its food compare with that of the seedling?

Answer 25

@Falco276 @goformit100 and everyone else

Answer 26

1:how is reproduction in flowering plants similar to reproduction in animals?: Sexual reproduction is a process that creates a new organism by combining the genetic material of two organisms; it occurs both in eukaryotes[1][2] and in prokaryotes.[3] A key similarity between bacterial sex and eukaryotic sex is that DNA originating from two different individuals (parents) join up so that homologous sequences are aligned with each other, and this is followed by exchange of genetic information (a process called genetic recombination). After the new recombinant chromosome is formed it is passed on to progeny).
On the other hand, bacterial conjugation, a type of transfer of DNA between two bacteria, is often mistakenly confused with sexual reproduction,[4] because the mechanics are similar. However, bacterial conjugation is controlled by plasmid genes that are adapted for spreading copies of the plasmid between bacteria. The infrequent integration of a plasmid into a host bacterial chromosome, and the subsequent transfer of a part of the host chromosome to another cell do not appear to be bacterial adaptations.[3][5]
In contrast, bacterial transformation can be regarded as a form of sex in bacteria.[3][6] Bacterial transformation is a complex process encoded by numerous bacterial genes, and is clearly a bacterial adaptation for DNA transfer. This process occurs naturally in at least 40 bacterial species.[7] For a bacterium to bind, take up, and recombine exogenous DNA into its chromosome, it must enter a special physiological state referred to as competence (see Natural competence). Sexual reproduction in early single-celled eukaryotes may have evolved from bacterial transformation.[8]
There are two main processes during sexual reproduction in eukaryotes: meiosis, involving the halving of the number of chromosomes; and fertilization, involving the fusion of two gametes and the restoration of the original number of chromosomes. During meiosis, the chromosomes of each pair usually cross over to achieve homologous recombination.
Sexual reproduction is the primary method of reproduction for the vast majority of macroscopic organisms, including almost all animals and plants. The evolution of sexual reproduction is a major puzzle (see Evolution of sexual reproduction). The first fossilized evidence of sexual reproduction in organisms such as eukaryotes is in the Stenian period, about 1 to 1.2 billion years ago.[9]
Evolutionary thought proposes several explanations for why sexual reproduction developed and why it is maintained. These reasons include fighting the accumulation of deleterious mutations, increasing rate of adaptation to changing environments[10] (see the red queen hypothesis), dealing with competition (see the tangled bank hypothesis) or as an adaptation for repairing DNA damage (see Evolution of sexual reproduction).[3][6][8] The maintenance of sexual reproduction has been explained by theories that work at several different levels of selection, though some of these models remain controversial. New models presented in recent years, however, suggest a basic advantage for sexual reproduction in slowly reproducing, complex organisms, exhibiting characteristics that depend on the specific environment that the given species inhabit, and the particular survival strategies that they employ.[11]

Answer 27

@thomaster

Answer 28

yeah i can do that @Tahmina

Answer 29

okay, youre welcome:)

Answer 30

@killinglighthouse thanks!

Answer 31

1:how is reproduction in flowering plants similar to reproduction in animals
2: How does the way that the plant embryo gets its food compare with that of the seedling?
3: a seed is to a plant as a zygote is to
a: pine tree
b: bacterium
c: an animal
d: moss plant

4:How does the way that the plant embryo gets its food compare with that of the seedling?

Answer 32

5: which type of cell division forms the gametes? Which type of cell division is responsible for the growth of the zygote into an embryo?

Answer 33

@thomaster @Slash1998 @Falco276

Answer 34

ineed help and its urgent!

Answer 35

@some_someone

Answer 36

a seed is to a plant as a zygote is to an animal.

Answer 37

okay what abot the other questions?

Answer 38

what other ones?

Answer 39

1:how is reproduction in flowering plants similar to reproduction in animals
2: How does the way that the plant embryo gets its food compare with that of the seedling?
4:How does the way that the plant embryo gets its food compare with that of the seedling?
5: which type of cell division forms the gametes? Which type of cell division is responsible for the growth of the zygote into an embryo?

Answer 40

@some_someone ^^

Answer 41

1: Both reproduce sexually by union of male and female gametes

Answer 42

okay thanks ! waiting for 2-5 :0 patiently

Answer 43

can i get the answer by next half hour :) thanks!

Answer 44

2 and 4 are the same question lol

Answer 45

2 and 4 are the same?

Answer 46

lol @thomaster i just realized that too :)

Answer 47

5: type of cell division that forms the gametes is meiosis
the type of cell division that is responsible for the growth of the zygote into an embryo is Mitosis

Answer 48

For 2/4 i think its something with cotyledons

Answer 49

You should be able to figure it out with this page:
http://en.wikipedia.org/wiki/Cotyledon

I'm outta here its 2:07 AM and i'm tired xD

Answer 50

its only 7:09 pm here

Answer 51

yea but i live in amsterdam :P not usa

Answer 52

oh well that explains alot

Answer 53

oh @Slash1998 were do you live? its now 8:28pm here inNY