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Sati [7]
2 years ago
8

I need help ASAP!!

Biology
2 answers:
Elis [28]2 years ago
8 0
True. If it has even one dominant allele that will be the trait expressed (that’s why it’s dominant)
Reil [10]2 years ago
6 0

Answer:

TRUE

Explanation:

I believe its true I read about it in a book somewhere.

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What describes a carrier protein in cell surface membrane?
Margarita [4]

Explanation:

Carrier proteins are proteins that carry substances from one side of a biological membrane to the other.

8 0
2 years ago
Which of the following observations did Mendel make as a result of his experiments with dihybrid crosses?
Vinvika [58]

The correct answer is: B) Different traits are inherited separately.

Mendel’s conclusions as a result of his experiments with dihybrid crosses are known as Mendel’s laws.

• Mendel’s law of Segregation: During the gametes formation (meiosis), alleles are separated so that each gamete carries only one allele for each gene

• Mendel’s law of Independent Assortment: The segregation of alleles of one gene is independent to that of any other gene

Mendel also defined the Principle of Dominance: Recessive alleles will be masked by dominant alleles when are together in heterozygous genotype.

3 0
3 years ago
An ecosystem is defined as
kirill115 [55]

Answer:

An Ecosystem is a community of Living Organisms and Non living components of their Environment

OPTION A IS YOUR ANSWER!!!

4 0
3 years ago
Read 2 more answers
2.
prohojiy [21]

Answer: Option B. core samples

Explanation: this is the only option that is not used for locating minerals

4 0
2 years ago
Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium woul
Arte-miy333 [17]

Answer:

  1. Calcium binds to troponin C
  2. Troponin T moves tropomyosin and unblocks the binding sites
  3. Myosin heads join to the actin forming cross-bridges
  4. ATP turns into ADP and inorganic phosphate and releases energy
  5. The energy is used to impulse myofilaments slide producing a power stroke
  6. ADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filament
  7. ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle
  8. Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

Explanation:  

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing <u>calcium into the sarcolemma.</u> At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament.  Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

4 0
2 years ago
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