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crimeas [40]
3 years ago
6

Which is the main reason toads must lay eggs in water?

Biology
1 answer:
Lisa [10]3 years ago
4 0
The answer is A. The <span>eggs do not have a shell to prevent water loss.

Toad's eggs do not have a shell, like reptile eggs or bird eggs. Shell is important because it protects eggs from drying out if they are laid in the land. </span><span>Toads lay eggs in a jelly-like glycoprotein. </span><span>Thanks to glycoprotein around toad's eggs, contact with water is maintained all the time so that eggs don't die. </span>
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What percent of the of the father's possible gametes are consistent with producing offspring with cri-du-chat syndrome?
CaHeK987 [17]
<span>In 80% of the cases of offspring with cri-du-chat syndrome, the father's gametes were the source of the deletion of the chromosome as opposed to the mother's egg being the cause. Therefore, cri-du-chat is largely caused by the father's genetics, not the mothers.</span>
4 0
3 years ago
Which of the following correctly describes the structure of the typical eukaryotic genome?
KonstantinChe [14]

Answer:

Diploid.

Explanation:

DNA is present in the genetic material of all the eukaryotic and prokaryotic organisms.The eukaryotic genome contains DNA wraps around the histone proteins. Multiple distinct chromosomes are present in the eukaryote genome.

The eukaryotic genome are generally linear structure with the two copies of each chromosome. This makes the eukaryotic genome as diploid structure.

Thus, the correct answer is option (1).

5 0
3 years ago
Read 2 more answers
What is "change" when we are talking about natural and physical systems?
MaRussiya [10]

D.  A variable or alteration to one part that affects an entire system

Explanation:

When talking about natural and physical systems, change is a variable or alteration to one part that affects an entire system.

Systems are groups of processes that have the same overall function. There are several types of interacting components that makes up both physical and natural systems in our world.

  • The part of  system is related and interconnected via the changes they undergo.
  • Changes typically causes variation or alteration of parts of a system.

learn more:

Biogeochemical cycle brainly.com/question/3509510

#learnwithBrainly

7 0
3 years ago
Anyone have this answer
Evgesh-ka [11]

Answer: c

Explanation:

6 0
3 years ago
The relative location of four genes on a chromosome can be mapped from the following data on crossover frequencies Genes B and D
kykrilka [37]

Answer:

3. CABD

Explanation:

The gene mapping refers to providing position to the genes on the chromosomes.  The first gene map was constructed by the Alfred Sturtevant on the basis of recombinant produces or recombination frequency which was calculated.

The gene mapping refers to providing position to the genes on the chromosomes.

In the given question to construct gene map:

1. Look for the highest recombination frequency that is 50% between the C and D.

2. Now look for second-highest value and place the gene accordingly.

3.Similarly, place the genes in the decreasing order of recombination frequency and this will result that the sequence of the genes is- CABD.

Thus, Option-3 is correct.

5 0
3 years ago
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