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antiseptic1488 [7]
3 years ago
14

Please helpp in timed test! giving brainliest!!!! 15pts

Biology
1 answer:
9966 [12]3 years ago
7 0

Answer:

The answer is True

Explanation:

Hope this helps:>

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If the integument of an angiosperm seed contains cells with 20 chromosomes, how many chromosomes would you expect to find in the
OleMash [197]

Answer:

30

Explanation:

The seed of an angiosperm is formed as a result of fertilization (fusion of sperm in pollens and the ova from ovary). According to the question, the cells of the seed which will grow into the plant contains 20 chromosomes. Seeds of angiosperms contain a tissue called ENDOSPERM that forms as a result of the unique DOUBLE FERTILIZATION in angiosperms. It occurs when one haploid sperm cell fuses with two haploid polar nuclei to form a triploid endospermic structure that serves as food for the growing embryo in the seed.

Now based on the above explanation, the diploid plant cell with 20 chromosomes will have 10 chromosomes (half as much) in its gametes as a result of meiosis. This 10 chromosomes in each gamete (sperm and ovum) fuses to form a diploid zygote with 20 chromosomes, while one haploid sperm cell (10 chromosomes) also fuses with two haploid polar nuclei (10 chromosomes each) to form a triploid endosperm with 30 chromosomes i.e. 10+10+10.

8 0
3 years ago
How much force would is required to stop a 1200kg car in 2 seconds if the car is traveling at 22 m/s
Shalnov [3]
Force required = F = ?

mass of the car = m = 1200 kg

initial velocity of the car = Vi = 10 m/sec

final velocity of the car = 0

time required to stop the car = t = 20 sec

Using Newton`s 2nd law of motion;

F = ma ………………………(1)

as a = Vf - Vi / t , put this value in equation (1)

F = m ( Vf - Vi /t ) ………………(2)

F = 1200 ( 0 - 10 /20) = - 600 N

here Negative sign shows that external force is acting in opposite direction of the motion to bring it to rest.

we can also calculate this force by using the relation

Rate of change of momentum = net force acting on the object …………(3)

m Vf - m Vi / t = net force acting on the object

m (Vf - Vi / t) = F

1200 ( 0 - 10 /20) = - 600 N = F

so, net force acting on the object =F = - 600 N

5 0
3 years ago
What happens to some of the carbon dioxide produced by plant cells during the day? 1. It is consumed by animals. 2. It is used f
posledela
I have the same question right now and the correct answer is photosynthesis
7 0
3 years ago
Which is the best hypothesis for the scientific question “How does light intensity affect the rate of photosynthesis?”
sukhopar [10]
As light intensity increases, the rate of photosynthesis increases, whereas a decrease in light intensity decreases the rate of photosynthesis, because light is a necessary factor for photosynthesis
8 0
3 years ago
You are performing an experiment that involves
statuscvo [17]

Starch is a polymer composed of glucose units as monomers. Hydrolysis reaction can break down large molecules into smaller ones.

  • Hydrolysis is a type of chemical reaction in which a water (H2O) molecule is used to break down large molecules into smaller ones.

  • Starch is a complex polysaccharide composed of more than six (6) glucose molecules linked by alpha-glycosidic bonds.

  • Glycosidic bonds can be hydrolyzed by specific enzymes known as glycosidases.

  • A starch molecule composed of 300 glucose molecules contains 299 alpha-glycosidic bonds.

  • In consequence, in this case, 299 water (H2O) molecules are required to completely hydrolyze the amylose starch polymer into glucose monomers.

Learn more in:

brainly.com/question/6764639?referrer=searchResults

4 0
3 years ago
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