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ollegr [7]
3 years ago
9

What are the two kinds of disturbances that change ecosystems?

Biology
1 answer:
sesenic [268]3 years ago
8 0
Human and the natural ones can change the ecosystem
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Nina says that a newly fertilized egg cell cannot survive without nourishment from the mother. Carole says that the fertilized e
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The newly fertilized egg gains mass only after it is implanted in the uterus wall. Before the implantation, there is no gain in the mass of the fertilized egg. Moreover, the nourishment is not derived from the cell of the uterus. A newly fertilized egg is capable of surviving without the nourishment from mother as long as the nourishment is provided in vitro. Hence, the statements of Nina and Carole are not right.

Hence, the answer is 'the statement of Sarah is correct'.

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If you chemically synthesized the DNA molecule ATGCCGAATG from individual nucleotides, what would be present in solution besides
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Answer:

C

Explanation:

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Which of these terms refers to materials leaving the cell? A endocytosis B exocytosis
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B - exocytosis.

Think of like materials EXitig the cell via EXocytosis
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3 years ago
For this week's CRQ, you are to design your own genetic cross between a female and a male. Be sure to include each of the follow
svp [43]

Answer and Explanation:

Punnett squares are illustrations that display the product of hybrid trait crosses by genetic breeding. Established parent genotypes and phenotypes are used and are usually compatible with Mendelian ratios and inheritance. The phnomenon influencing this behaviour is the

  • Law of Segregation,
  • Law of Independent assortment
  • and Dominance

For this cross...

Assuming Widow's peak= dominant

<u> 1. What are the dominant and recessive traits in cross?</u>

Parent generation or P generation:

gametes: Ww → Widow's peak dominant (W), No Widow's peak recessive (w)

<u>2. Is the male homozygous dominant, homozygous recessive, or heterozygous?</u>

Heterozygousity describes the allelic makeup; these traits are made of two different forms of the same gene.

Male: Ww  →  with the W.peak;  

(Thus, with both W and w this is a heterozygous trait)

<u>3. Is the female homozygous dominant, homozygous recessive, or heterozygous?</u>

However, homozygous traits are made up of the same forms of the gene called alleles.

Female: ww → without the W.peak  

(Thus, with both w ad w this is a homozygous trait)

<u>1. genotypes and phenotypes for parent and offspring...</u>

<u></u>

Assuming heterozygousity of the male , for the cross

P generation:                          Ww× ww

                            Widow's peak  ×No Widow's peak  

F1 generation:

  • genotype:                       Ww × ww       ...(from punnet square)
  • phenotype:          2 with the W.peak; 2 without

<em>∴ 50% are genotypically heterozygous while 50% is homozygous , 2 with the W.peak; 2 without </em>

6 0
3 years ago
Two of the five types of taste buds are activated by directly hypopolarizing the taste buds; i.e. do not involve a second-messen
Marianna [84]

Answer: salty and sour

Explanation:

Taste buds consist of the taste receptor cells and they're the nerve endings on the tongue that provide the sense of taste.

Based on the information given, the tastes that activate these receptors are salty and sour. The tastes depolarize the cell receptor directly.

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