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Andrej [43]
3 years ago
9

True or False: In human beings, fertilization occurs externally.

Biology
1 answer:
MariettaO [177]3 years ago
6 0

Answer:

False.

Explanation: Fertilization is a process in sperm cell combine with egg cell.

In human beings, fertilization occurs internally. During fertilization, sperm of male combine with egg of female inside the female body which changes into zygote. After sometime, zygote turns into a new baby. About nine months, the baby comes out from the body of female.

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What organelle has the same function like a waste disposal plant
Iteru [2.4K]

Answer:

Lysosomes are the cell organelle having same function like waste disposal in plants.

Explanation:

Lysosomes are the organelle that destroys the damaged organelles inside the cell. And acts as same function like waste management. It is present in both plants as well as animals. The opposite to it or the construction one is ribosome. In lysosomes it has certain enzymes as well as acids that helps in digestion of damaged cell materials, and also in recycling it. Not only are the cellular waste it may be some old or torn out cells. It acts as a cellular stomach. They are generally fluid filled sacs.

5 0
3 years ago
What makes a water molecule polar? *
Vlad [161]

Answer:

it has partial charges

The hydrogen gives a positive partial charge

The oxygen gives a negative partial charge

Oxygen is way more electronegative than hydrogen therefore the molecule will be polar.

6 0
3 years ago
I’m having trouble understanding this can someone plz explain?
Leni [432]

Answer:

look at the pictures

Explanation:

1. If we cross the parental generation which is RR x rr, the probability of the F1 generation to get  rough coat is 100% and they will be a carrier of the recessive trait smooth coat.

Since the phenotypic ratio is 100% heterozygous Rr, in crossing the F1 to get the F2, we will use the genotype Rr. To get the F2, use the cross  Rr x Rr.

The phenotypic ration for F2 is 3:1. There is 75% to get rough coat and 25% smooth. The answer is based on the result on the Punnett square. On the other hand, the genotypic ratio is 1:2:1. There is 25% probability to get RR genotype, 50% Rr, and 25% rr.

2. Since the two parental mice got 6 albino offspring and 5 brown mice offspring, it is approximately 50%. it takes a parental mice who is Brown that is carrying an albino trait crossed with an albino to get offspring with almost the same number. Therefore, the genotype of the brown mice is Aa.

8 0
2 years ago
Why are AT pairs are easier to pull apart than GC pairs during the unwinding process
Mice21 [21]
Initiator proteins break hydrogen bonds separating short length of DNA, AT base pairs are held together by fewer hydrogen bonds than GC pair. Thus AT pairs are easier to pull apart, At rich regions are typically found in the replication origins. Replication origins are site at which DNA is first opened.
5 0
3 years ago
In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-posi
asambeis [7]

Cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-positive bacteria because the outer membrane of the gram-negative bacteria inhibits penetration of the drug and the peptidoglycan found in gram-positive bacteria is structurally different from that in gram-negative bacteria.  

Answer: Option B & C

<u>Explanation:</u>

Antimicrobial drugs are induced into a body to act on that particular selective bacterium which causes disease. When antimicrobial drugs are injected they act efficiently on the gram positive bacteria inhibiting the proliferation of the cells by acting on the cell wall so that cell multiplication doesn’t happen.

On the other hand it is hard to act on the gram-negative bacteria as it has a cell membrane that inhibits drug penetration into it. Both cell walls contain peptidoglycan but in the gram-positive is more assembled and layered while in the gram-negative it is just a thin layer. As gram-positive is thick layered it provides place for another molecule to attach to it but the thin layer in gram-negative inhibits it.

4 0
3 years ago
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