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erma4kov [3.2K]
3 years ago
7

What is always true of a binary compound? A-It has two elements B-It has two atoms C-It has a double bond D-It has covalent bond

s.
Biology
2 answers:
babunello [35]3 years ago
6 0
The answer is it has two elements (A).
kirill [66]3 years ago
3 0

Answer:

Option A, It has two elements

Explanation:

The word binary indicates that a substance consists of two elements. Thus any binary compounds must consists of two different elements. A binary compound may consists of single , double or triple bond. These compounds may be ionic or covalent compound .

Some common examples of binary compound are –  

a) NaCl

b) N2O

c) MgO

d) KI

Hence,  under any circumstance a binary compound consists of two different element.

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A student was observing slides of cell division. In one of the slides, he noticed loosely coiled chromatin depicting DNA duplica
soldi70 [24.7K]

Answer:

A. S phase

Explanation:

The cell cycle involves all the series of division events that occurs to an organism. Cell division, which can be meiosis or mitosis, involves two main stages viz: Interphase and M phase.

Interphase describes the resting stage of the cell i.e. when the cell is not dividing. The cell uses this time to prepare itself for the next round of division. Interphase stage further consists of three main phases viz: G1, S and G2 phases.

In the S phase or synthesis phase of Interphase, the cell duplicates its genetic material (DNA). Hence, an onion cell observed by a student to have loosely coiled chromatin depicting DNA duplication is in the S-PHASE.

6 0
3 years ago
Which theme of geography describes features that make a site unique?
omeli [17]
Place is one of the five themes of geography that describes the features that make a site unique such as paris, france has the eiffel tower and the arc de triumph. In addition, the five themes of geography are location, place, region, movement and human environment interaction. 
6 0
4 years ago
Human Immunodeficiency Virus (HIV) infects cells of the immune system.
nasty-shy [4]

Explanation:

Results in a decline in CD4+T cell numbers below the critical level, and loss of cell-mediated immunity. Therefore the body becomes progressively more susceptible to opportunistic infections and cancer.

8 0
3 years ago
Find the prokaryotic promoter sequences; Draw boxes around them, Circle the start codon. Then transcribe the following DNA seque
Degger [83]

Explanation:

The transcription is a process which transcribe the DNA into a molecule which could be read by the machinery to translate it into the proteins and that molecule is known as the mRNA molecule.

1.The mRNA molecule is transcribed by an enzyme called RNA polymerase which transcribe DNA in 5'to 3'direction that is DNA strand will be 3' to 5'direction therefore the strand with 3' to 5' will act as template strand.

2. The RNA polymerase binds at promoter region and there are two sequences in prokaryotes at -35 end which is TTGACA and at -10 end which is TATAAT.

3. The translation begins after the start codon which is AUG therefore proteins will be synthesized after AUG.

In the given question, both promoter sequence are present in the 5'to 3'strand

3’GTAACTGTCGAACTACTGTCTACGTCATATTACGCTAATCGATACTGCCTGCATCGATCGTCGACTGCGGTCCGAA

The mRNA will be -

5'- CAUUGACAGCUUGAUGACAGAUGCAGUAUAAUGCGAUUAGCUAUGACGGACGUAGCUUAGCAGCUGACGCCAGGCUU-3'.

There are two start codon thus two polypeptides will be synthesized.

1. met-thr-asp-ala-val

2. met-thr-asp-val-ala-ser-ser

7 0
3 years ago
Which finches would be most like the ancestral finch?
Blizzard [7]
<span>Warbler Finches are most like the ancestral finch</span>
3 0
3 years ago
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