BIOLOGY HIGH SCHOOL

3. Prokaryotic cells have membrane enclosed cell structures.
O
True
O
False

Answers

Answer 1
Answer:

Prokaryotic cells lack membrane enclosed cell structures.

What are the characteristics of prokaryotic cells?

Prokaryotes are single-celled organisms belonging to the domains Bacteria and Archaea. Prokaryotic cells are much smaller than eukaryotic cells, have no nucleus, and lack organelles.

Examples of prokaryotes are blue-green algae, bacteria and mycoplasma. Among prokaryotes, bacteria are the most common and multiply very fast.

They lack a nuclear membrane. Mitochondria, Golgi bodies, chloroplast, and lysosomes are absent. The genetic material is present on a single chromosome. The histone proteins, the important constituents of eukaryotic chromosomes, are lacking in them.

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Answer 2
Answer:

Answer:

False

Explanation:

Prokaryotic cells lack a membrane enclosed nucleus and organelles.

Related Questions

____________________ is the smallest unit of life. A. DNA B. An organism C. The cell D. A molecule
Identify the correct order in which breast cancer develops. A) mutiation of normal cells-tumor growth-invasions of tissues-metastasis-metastatic tumor . B) invasion of tissues-metastasis-mutation of normal cells-tumor growth-mestastatic tumor. C) metastasis-mutation of normal cells-invasion of tumor-mestastatic tumor-tumor growth.
Which best summarizes the flow of energy in a producer?Sun à ADP à muscle cellsSun à mitochondria à C6H12O6Sun à chloroplasts à mitochondriaSun à mitochondria à chloroplasts
What might happen to the DNA if a cell were to proceed through mitosis without first condensing the DNA? A. The DNA would be replicated. B. The DNA would be damaged. C. The DNA would remain in the nucleus. D. The DNA would not separate properly.
Dense substances sinking into Earth's core heated Earth's interior through _________.a. friction b. volcanism c. radioactive decay d. mantle convection

Which is an example of reverse polarity?a. Earth's magnetic field lines up in the same direction as the present magnetic field.
b. The south magnetic pole lines up with the present south magnetic pole.
c. Earth's magnetic field lines up in a direction opposite of the present magnetic field.
d. The north magnetic pole is aligned with the present north magnetic pole.

Answers

Answer:

The Answer Is C

Explanation:

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Answer: its C cuh

Explanation: im always right

Differences between forsest ecosytem and greenhouse

Answers

ecosystem (imagine a forest ecosystem) 1. Consists of many species of plants and animals 2. Genetic diversity is very high 3. The sunlight is the energy source for autotrophs and this energy drives all biological cycles 4. Food chains are long and complex 5. Ecological succession takes place in a natural ecosystem over the period of time 6. Natural nutrient cycling ensures maximum and efficient cycling of nutrients 7. Productivity is extremely variable and depends on the environment. In tropical rainforest productivity is very high, but in deserts productivity is very low

what does mechanical digestion in the stomach involve ? ( 1point ) A. absorption of nutrients by villi B. pepsin and bile C. smooth muscle contractions D. bile and pancreatic fluid

Answers

The mechanical digestion in the stomach involves the contractions of muscle smoothly. Thus, the correct answer is C.

What is digestion?

The process of converting food into nutrients to use it as energy and for development is called as digestion. The digestion takes place mechanically and chemically.

In the chemical process of digestion, food is broken down with the help of enzymes whereas in the mechanical process of digestion food is broken down with the help of chewing from teeth or tearing.

Therefore, option C is correct as this breakdown through teeth involves contractions and relaxation of muscles.

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Final answer:

Mechanical digestion in the stomach involves the physical breakdown of food through smooth muscle contractions, which churns and mixes the food, preparing it for further chemical digestion.

Explanation:

Mechanical digestion in the stomach involves the breaking down of food into smaller bits using physical force. This process includes the smooth muscle contractions of the stomach to churn the food. This mechanical churning of food in the stomach serves to further break it apart and expose more of its surface area to digestive juices, creating an acidic soup called chyme.

These contractions isolate small sections of the stomach, moving the contents back and forth while continuously subdividing, breaking up, and mixing the contents. By moving food back and forth in the stomach, mechanical digestion mixes food with digestive juices and facilitates the further process of chemical digestion.

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The development of vascular tissue allowed some seedless plants toa. perform photosynthesis.
b. grow taller.
c. use alternation of generations.
d. make sugars for energy.

Answers

The development of vascular tissue allowed some seedless plants to : b. grow taller one of the main function of the vascular tissue is to transport fluid and nutrients. By having enough nutrients, it help the plant to gain necesary substance to grow bigger.
The answer is B grow taller. I am 100% sure

The code for a DNA strand is CGTA. What is the complementary strand?

Answers

The DNA molecule is composed of two long complementary chains of nucleotides. The complementary DNA sequence of CGTA is GCAT.

The DNA molecule is composed of two antiparallel strands of nucleotides linked together by hydrogen bonds.

In DNA, there are four types of nucleotides, each containing one different nitrogenous base (i.e., Adenine, Guanine, Cytocine and Thymine).

In RNA, Thymine bases are replaced by Uracil bases.

According to the base pair rules, Adenine (A) always pairs with Thymine (T), whereas Cytosine (C) always pairs with Guanine (G).

In conclusion, the complementary DNA sequence of CGTA is GCAT.

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Explanation:

The complementary DNA strand of the sequence ATGC will be TACG. The complementary base pairing in DNA is as per the...

Includes parenchyma, collenchyma, and sclerenchyma

Answers

The answer is ground tissue.

Plants have 3 types of tissues - dermal, vascular, and ground tissue. Ground tissue includes parenchyma, collenchyma, and sclerenchyma. 
Parenchyma has a role in photosynthesis, storage. It also makes the bulk of ground and vascular tissue.

The function of sclerenchyma and parenchyma is support and strength of roots, stems, and leaves.
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