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Ahat [919]
4 years ago
14

Which correctly distinguishes between how a pine tree and an apple tree reproduce?

Biology
2 answers:
Slav-nsk [51]4 years ago
8 0

Answer:

It’s b on edge

Misha Larkins [42]4 years ago
6 0

Answer:

The pine tree has unprotected seeds; the apple tree has seeds in fruit.

Explanation:

Edgenuity

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You decide to repeat the Meselson-Stahl experiment, except this time you plan to grow the E. coli cells on light 14N medium for
svet-max [94.6K]

Answer:

A) One band of intermediate density and one band of heavy density.

Explanation:

According to semi conservative model of replication the two DNA strands separate during replication such that the new DNA molecule has one parental strand and one new strand. In this experiment, originally E.Coli cells were grown in 14N medium so all the DNA strands had 14N. When the medium was changed to 15N, only 15N would be available to the cells for replication.

After first round of replication all DNA molecules would be of intermediate density as one strand would be old 14N strand and another would be new 15N strand. After second round of replication 15N strand would be formed from both 14N strand and 15N strand. So, one band will be formed of intermediate density (14N-15N) and another would be of heavier density (15N-15N).  

5 0
3 years ago
What is the relationship between allele frequency's and a gene pool.
GenaCL600 [577]
Allele frequency refers to how common an allele is in a population. It is determined by counting how many times the allele appears in the population then dividing by the total number of copies of the gene. The gene pool of a population consists of all the copies of all the genes in that population.
6 0
3 years ago
Hormones are proteins that regulate many functions in the body, such as growth and cell differentiation. Which of the following
Brrunno [24]

Answer Options:

  • Proteins store energy long term, provide lubrication, and insulate the body
  • Proteins in the form of enzymes catalyze chemical reactions
  • Proteins provide structures in the body, such as hair and muscles
  • Proteins in the cell membrane help transport substances into and out of cells

Answer:

  • Proteins store energy long term, provide lubrication, and insulate the body

Explanation:

  • Proteins store energy long term, provide lubrication, and insulate the body  - this is false, this describes the role of fats.
  • Proteins in the form of enzymes catalyze chemical reactions  - this is true, enzymes are an important class of proteins in the body
  • Proteins provide structures in the body, such as hair and muscles  - this is true, for example our hair is made of a protein called keratin
  • Proteins in the cell membrane help transport substances into and out of cells  - this is true, proteins form important pumps and channels in the cell membrane
8 0
3 years ago
How does gene therapy work to reverse the causes of cancer we learned about today?
tatiyna

Answer:

Explanation:

In gene transfer, researchers introduce a foreign gene directly into cancer cells or into surrounding tissue. The goal is that the newly inserted gene will cause the cancer cells to die or prevent cancer cells and surrounding tissue from funneling blood to tumors, depriving them of nutrients they need for survival.

3 0
3 years ago
helpppp please ecosystem between 1975 and 1976 after which time rapiddeforestation and logging took place. Starting in 1979 the
Neporo4naja [7]

Since the population of finches had decreased when deforestation and logging started, and it returned to its original values prior to deforestation when locals started to replating trees, it follows from these facts that trees are being a limiting factor in finches' populations, either because they're acting as niches, food, both or anything else that these populations needed to survive.

Therefore, the correct answer to this question is option D.

8 0
2 years ago
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