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Mkey [24]
2 years ago
6

Researchers returning from the world’s most ambitious study ever of the

Biology
1 answer:
topjm [15]2 years ago
8 0

Answer: North Pole

Explanation: On Oct 12th, 2020 the largest expedition ever undertaken came to an end after researchers spent over a year studying climate change and ice drifting in the Arctic.

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Choose the word that best completes each sentence.
liraira [26]

Answer:

roots

leaves

flowers

fruits

Explanation:

Plz make me the brainlist

7 0
2 years ago
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Complete the sentence using the correct term.
Maksim231197 [3]

Answer:

Cloning technology

Explanation:

With cloning technology we can replicate and combine different genes to study, save lives, and create new species

3 0
3 years ago
In Drosophila, the genes for body coloration and eye size are on different chromosomes. Normal-colored bodies are dominant to eb
hammer [34]

Answer:

150.

Explanation:

150 flies are expected to have normal body color and to be eyeless in F2 generation. The reason for that population is the ratio of the species produced. The ratio of the species are 9:3:3:1. Ratio 9 refers to first parent while 1 refers to second parent and the middle 3's represent the hybrid formed. So the population of first parent is 450 and population of second parent is 50 while the population of two hybrids are 150 each.

3 0
3 years ago
The position on the basilar membrane at which waves reach their peak depends on the frequency of a tone according to which theor
uysha [10]
As per Georg von Békésy's place theory, the position on the basilar film at which waves achieve their pinnacle relies upon the recurrence of a tone. High frequencies deliver waves that crest close to the shut end and are deciphered as shrill sound, while low-recurrence waves travel more remote, topping at the far end, and are translated as low-pitched.
5 0
3 years ago
Which of the following statements is most correct regarding the intracellular chemical signals known as "second messengers"? Sel
Mila [183]

Answer:

Cyclic AMP and calcium may be second messengers.

Explanation:

these are signalling molecules that are located inside the cells,They are releases  when cells   are in contact with  signals from an extracellular molecule. the extracellular molecules that cause the chemical  reaction  in an external environment  in the second messenger are called first messenger.

<u>the basic mechanisms of second messenger involve the binding of ligands to the cell membrane receptors( usually a trans membrane protein).causing   conformational  change in the receptor protein. The latter change affect the structural and functional activities of the receptors protein with a consequent  production of second messenger,</u>

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Response of the cells  to the first messenger my cause different form of cellular reactions; the cells may  undergo depolarization  with influx of out flux of ions, differentiate to specialized cells  or migrate to another location.

Examples of first messenger are hormones and neurotransmitters, while calcium ions, cyclic GMP,AMP, diaclyglycerol are examples of first messengers.

Most first messengers are peptide hormones.Some may be streroid, However, the hydrophilic nature of the peptide hormone restrict their movement, at the cell membranes. Therefore most first messengers made of  peptide  are first converted to second messenger to  bring about their signalling effects.The usually mark the beginning of cascade events by second messengers.

Second messengers are usually classified based on their polarity and molecular form this include the

<u> hydrophobic molecules</u> ;diacyglecerol,phosphatdylinotisols. These diffuse  through the membrane  into intramembrane space of cells cause signalling effects in the cell.

<u>the hydrophiliic  molecul</u>es  are  located in the cystol  of cells. Example are  Cylic AMP. GMP, Calcium,

N02, CO,H2S are <u>polar molecules</u> that easily diffuse into the cells to cause signalling effects, they are the third Classification of second messengers.

6 0
3 years ago
Read 2 more answers
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