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Montano1993 [528]
3 years ago
5

The heart contracts twice for every heartbeat one contraction is the atrial contraction while the other is the venture true or f

alse
Biology
1 answer:
jeyben [28]3 years ago
8 0

Answer:

True. The heart contracts twice per heartbeat. One contraction is the ventricular and the other one is the artrial.

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Answer: the first answer is correct.

Explanation:

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4 years ago
Which of the following strands is the correct complement to the strand ATC-GTC-CCA
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Answer: The correct complementary DNA sequence for the given sequence is D. TAG-CAG-GGT.

DNA contains nucleotide pairs on a sugar phosphate backbone. The nucleotide pairs are connected by hydrogen bonds and each nucleotide pairs with only one other nucleotide. The bases are of two types: purine and pyrimidine. The purine bases bond only to pyrimidine bases. The base pairing follows Chargaff’s rule where adenine forms a pair with thymine by two hydrogen bonds and Guanine forms a bond with cytosine with three hydrogen bonds between them.

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4 years ago
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If the ancestral form for a particular lineage was aquatic and used gills for respiration, what changes would you expect to see
Marat540 [252]
<h2>The Respiration of Gills</h2>

Explanation:

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  • Amphibian life forms have a unique organ called gills, which permits them to inhale oxygen in the water.
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3 years ago
Which words or phrases describe some advantages of nonrenewable resources? Check all that apply.
Zigmanuir [339]

Answer:

easy to produce, affordable, abundant​

Explanation:

A non-renewable resource is defined as the natural resources which are not ereadily replaced through natural means and it takes thousands of years for their renewal. Example of non-renewable resource include Fossil fuels such as natural gas, oil and coal.

<u>There are many advantages of non-renewable resources such as:</u>

1) Easy to produce: non-renewable resources are easy to produce because processing stations can be easily developed for refinement and distillation of non-renewable resources.

2) Affordable and abundant: non-renewable resources are affordable and abundant in the earth. for example diesel and oil are good choices for powering vehicles.

Hence, the correct options are easy to produce, affordable, abundant​.

7 0
4 years ago
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shepuryov [24]

Answer: A. Plant

Explanation:

Plants have some of the most of complex cells of living organisms because they have different roles and structures to enable the plant to survive.

These include cells like the Parenchyma, Collenchyma, Sclerenchyma, Xylem and Phloem cells. Xylem cells for instance are complex cells located within the vascular tissues of plants and help transport water and minerals to the rest of the plant from the roots. Xylem cells look long and tracheal which is to enable them carry out the aforementioned roles.  

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