BIOLOGY HIGH SCHOOL

Which of the following is the SI unit used to measure mass?a.
kilogram
b.
liter
c.
meter
d.
Kelvin

Answers

Answer 1
Answer: A. A Kilogram is the SI unit used to measure mass.
Answer 2
Answer: A. you measure mass in grams

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Two objects are 5 kg and 10 kg respectively, and they're 10 m apart. If the distance between them is increased to 20 m, what happens to the gravitational force?A. It decreases.B. It increases slightly.C. It is doubled.D. It doesn't change

Answers


Answer: OptionA it decreases

Explanation :

The formula for gravitational force F is given by

F  = G M1*M2/ d^(2)

where, G is the gravitational constant

M1 and M2 is the mass of the two bodies.

d is the distnce between the two bodies.

  • Now according to the question,

M1 = 5 kg

M2= 10 kg

d = 10

If we put these values in the formula we get,

F = 6.67 * 10^(-11) * 5 *10 / 10^(2)

F = 3.335 * 10^(-11)

  • Now, if the d= 20

then the answer comes out to be 0.83375*10^(-11)

  • Thus, we can see that the gravitational force decreases.
  • We can also find the answer without any calculation from the fact that in the formula the force is inversely proportional to square of distance, thus as the distance increases, the gravitational force decreases.
i think  B. It increases slightly. 

How is over-irrgation damaging soil

Answers

Land lost its fertility By cultivate same crop again and again the We use so much water it harmful for crop production . Water logging occur root doesn't grow properly in water logging field Amount of salt increases due excessive of water It reason for over irrigation for daming soil

In an oil-based, nonpolar environment, phospholipids would arrange themselves so that they __________.

Answers

The answer would be : would stay together but in a reverse orientation, with their tails projecting outward.

Hope this helps !

Photon
Do you have an answer choice? If so please put and I would love to help you.

Which of the following has been a benefit of the space exploration efforts conducted from Florida? More jobs More revenue for the state Greater tourism All of these

Answers

The Space Exploration efforts conducted from Florida have created more jobs, more revenue for the state and greater tourism.
ANSWER \rightarrow The \ Space \ Exploration

Plants with an internal tubal system that transports water and nutrients to different plant parts are _____.

Answers

The correct answer is vascular plants. They have two types of tubes, the xylem and the phloem, and one transfers water through the plants, including minerals and useful matter, while the other transfers photosynthesis stuff through the plants. These are pretty much the common plants you see like flowers and trees.

Answer:

Plants with an internal tubal system that transports water and nutrients to different plant parts are vascular.

Which discovery could provide evidence against the theory of evolution? A. primate and trilobite fossil in the same rock layer
B. human gene in birds, fish, insects and plants
C. a living whale with a basic hip bone structure
D. bat fossil with a different limb structure than modern bats

Answers

Answer:

The correct answer is A. primate and trilobite fossil in the same rock layer

Explanation:

Trilobita is a class of marine arachnomorph arthropods that become extinct at the end of the Permian mass extinction about 250 million years ago. They were one of the most successful animals on earth and lived around 300 million years even more that dinosaur.

The fossil of early primates are nearly 55 million years old and the trilobite become extinct at least 250 year ago, therefore, this discovery provides evidence against the theory of evolution because the fossil of animals who extinct earlier should be found in lower region of soil than the fossil of animals who extinct later.  Therefore the correct answer is A.
B. because first of all those animals evolved before humans, and also from very different species than did humans. If humans have plants as their descendants/ ancestors that would make us question everything we know about our existence.
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