Question

will give a medal
Rocks being broken down as they tumble down a river is an example of

chemical weathering

pressure weathering

mechanical weathering

molecular weathering

Answer 1

@integralconstant

Answer 2

Which ones can you easily eliminate?

Answer 3

That would be mechanical weathering, as two or more objects are required in order for the weathering to occur. :)

Answer 4

thanks!

Answer 5

Sure no problem. Any other questions?

Answer 6

yes! if u don't mind helping,i would appreciate it!

Answer 7

Sure!

Answer 8

Fertilization used in this type of reproduction

sexual reproduction.

budding.

asexual reproduction.

replication.

Answer 9

Sexual reproduction. The sperm fertilizes the egg.

Answer 10

thanks! can u help me with a few more!?

Answer 11

Yep!

Answer 12

Scientists are trying to find a way to turn off the genes that cause genetic disease. This would be a type of

genetic engineering.

DNA manipulation.

gene changing.

artificial selection

Answer 13

Natural selection causes

populations to remain constant through changing environments.

populations to never change.

populations to change over time.

populations to lose their competitive advantage

Answer 14

I believe it would be DNA manipulation because the scientists would be altering/manipulating the genes to eliminate the disease.

Answer 15

Natural selection causes populations to change over time. Adaptation occurs as species encounter changing conditions over time.

Answer 16

thankyou so much! what about this one...
Human reproduction creates a unique individual because ______________ are combined.

chromosomes

phenotypes

sexes

individuals

Answer 17

It's called genetic engineering not DNA manipulation .Technical terms talks.

Answer 18

Human reproduction creates a unique individual because sexes are combined.

Answer 19

@integralconstant sorry. Wasn't thinkin there.

Answer 20

so it is genetic engineering?

Answer 21

Yes. Sorry.

Answer 22

Any more?

Answer 23

ok.. and yeah 1 sec

Answer 24

An imprint fossil is formed when

an organism is buried and part of the organic material is left behind.

an imprint of an organism is left in the mud.

an organism is petrified.

minerals fill an impression left by an organism.

Answer 25

I'm pretty sure it is "minerals fill an impression left by the organism". Im 99.873456946% sure thats it.

Answer 26

Proteins are manufactured in the

lysosomes.

nucleus.

ribosomes.

vacuoles.

Answer 27

I think its ribosomes.

Answer 28

ok thanks...
Traits controlled by more than one gene are called

multigenetic traits

monogenetic traits

polygenetic traits

tri-genetic traits

Answer 29

Polygenetic Traits