What does it mean for a backyard ecosystem to have a low diversity

Answers

Answer 1

Answer: it means there is a lot of the same thing and not many others

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What are some behavioral adaptations for a porcupines?

Answers

Well porcupines have quills and they shout the quills out when felt threatened or scared!

O2 +C8H18--> H2O + CO2

Answers

Balanced it would be:25O2+2C8H18-->18H2O+16CO2because when multiplied out:
O on the left is 50 and so is O on the right
C on the left is 16 and so is C on the right
H on the left is 36 and so is H on the right

24 POINTS!!!!!!!!!!!!!!!!!!Sarah, who has a mass of 55 kg, is riding in a car at 20 m/s. She sees a cat crossing the street and slams on the brakes! Her seatbelt stops her from flying forward, bringing her to rest in 0.5 seconds. How much force did the seatbelt put on Sarah?

Answers

F = (mass)(acceleration) = ma

m = 55 kg

Vi = 20 m/s

t = 0.5 s

Vf = 0 m/s (since she was put to rest)

a=(Vf-Vi)/t

a=(0-20)/5

a = 40 m/s^2 (decelerating)

F = ma = (55 kg)(40 m/s^2)

F = 2200 N

Hope this answer will be a good help for you.

change of momentum =mv-mu=m(v-u)=55(0-20)=-1100
rate of change of momentum=-1100/0.5=-2200 this is equal to force applied.
so force=-2200 kg/m^2
negative sign shows force acts in opposite direction to motion.

Apple trees reproduce naturally by sexual reproduction. How does this explain why there are many types of Apple's? Be sure to mention meiosis and chromosomes in your answer

Answers

Answer:

Sexual reproduction can be described as the method of reproduction in which the offsprings produced will have half the chromosomes as compared to the parent cell. The other half of the chromosomes to make a complete set would arise from the other parent. In this way, the offspring produced will carry half of the chromosomes from the female parent and half from the male parent.

Crossing over and independent assortment are two phenomenons of meiosis due to which genetic diversity occurs and the offsprings born are not exactly similar to the parent cell.

Answer: The four cells that are produced by meiosis has only one of each chromosome. One of these four cells from one parent combines with another from the other parent to produce the offspring. An offspring gets half its chromosomes from each parent. But the exact combination of chromosomes it gets from each parent is random. So, each offspring ends up with a unique set of genes different from its parents and other offspring.

Which part of the human ear is part of the inner ear? A)cochlea
B)oval window
C)ear canal
D)Hammer

Answers

Cochlea is present in inner ear !!

So go with A !!
if you need more info on that ; comment !!

Answer: cochlea

The cochlea is responsible for turning sound waves which is what makes you hear.

What does jupiter and saturn have in common and what do they don't

Answers

they are both gas giants and have rings. but unlike Saturn's rings being made of ice and is visible Jupiter's rings are dark and hard to see. they are also made of tiny rock and dust.

they both have a gaseous surface, raging storms, rings, lots of moons, and are very large planets.

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Which is easier to observe the physical or chemical properties of an object? Support your answer with evidence

A microwave oven has a power rating of 850 w. If the microwave oven is turned on for 6 minutes ,how much energy will it use?state the units in your answer

Metals can be found____ the “staircase”in the periodic table. A. To the right of B. To the left ofC. On D. Above