1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Licemer1 [7]
3 years ago
15

Which of the following structures develops into a pollen grain?

Biology
1 answer:
koban [17]3 years ago
5 0
The answer is (c). microspore.
You might be interested in
Group name given to the first life forms which developed on earth about 3.8 billion years ago
aleksandrvk [35]
The first living things on Earth, single-celled micro-organisms<span> or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have </span>first<span> appeared on </span>Earth<span> almost four billion years ago, just a few hundred million years after the formation of the </span>Earth<span> itself.</span>
4 0
3 years ago
A worker sprayed fertilizers, which stimulate the growth of native bacteria, on an oil-soaked area. Which one of the following c
larisa [96]
<span>The best answer is :
</span><span>A. bacterial growth reduces the chances of fire due to oil spill because s</span>praying fertilizers on an oil soaked area stimulates growth of bacteria that metabolize the oil and it speeds the natural breakdown process.
8 0
3 years ago
A number of marine reptiles and birds have salt glands, which have a remarkable ability to concentrate salt solutions for excret
Lemur [1.5K]

Answer:

A)100mL  B)50mL  C)The second option  D)Hypoosmotic Environment

Explanation:

The average Na concentration in the seas and oceans of the world is around 3,5% which mean that in 100 ml of sea water, there is around 3,5 grams of Na.

The weight of one mol of NaCl is 58,44 grams. For 3,5 grams of NaCl, we get 3,5/58,44 = 0,060 mol of NaCl which is 0,060x1000 = 60 mmol/100ml. According to this and the information given in the question about the secretion of the salt glands', if the average sodium concentration is 600mmol/L, we have 60*10 = 600mmol/L so it would take 100 mililiters of water to excrete.

If the average Na concentration of the salt gland's secretion were 300 mmol/L, only 50 mililiters of water would be needed to excrete the same sodium load.

The second option of secretion is hyperosmotic to seawater because the concentration is higher.

Osmoregulation is the process of balancing the amount of water and salt between the body of the organism and its surrounding environment. For salt glands to be advantageous for osmoregulation, they need to be in a hypoosmotic environment.

I hope this answer helps.

3 0
3 years ago
When the centromeres split in mitosis,what does the sister chromatids’ name change to?
snow_lady [41]

Answer:

During anaphase 2, the chromosomes' centromeres break, and the spindle fibers pull the chromatids apart. The two split portions of the cells are officially known as "sister chromosomes" at this point.

Explanation:

5 0
3 years ago
1. The plant life that is characteristic of a biome depends upon:
eimsori [14]

Answer:

D. all of the above​

Explanation:

Biome refers to a large and relatively distinct terrestrial region having similar climatic conditions regardless of where it occurs on Earth. The characteristic climatic conditions (temperature and precipitation being the most important ones) and soil type of each biome type determine the type of plant species found there. Therefore, each biome is characterized by specific flora.  

For example, a desert biome is a temperate or tropical biome characterized by a lack of precipitation, seasonal variations in temperature and poor soil type with low organic matter that limits plant growth. Desert biomes have only the plant species that can survive these harsh conditions.  

5 0
3 years ago
Other questions:
  • PLS HELP!!!!!!
    15·1 answer
  • If you looked at unknown cells under a microscope, what could lead you to correctly conclude that they are bacteria cells?
    13·1 answer
  • Which phrases describe both lakes and ponds? Check all that apply.
    5·2 answers
  • Emily is developing a computer model of protist populations in certain areas of the ocean, and how they help maintain homeostasi
    9·1 answer
  • Which of the following is considered assimilation in the carbon cycle?
    7·1 answer
  • Which outcome is the main function of the light dependent reaction‘s of photosynthesis
    15·1 answer
  • Were does animal a come from​
    13·1 answer
  • Predators often feed on weak or
    9·2 answers
  • QUESTION 1
    7·1 answer
  • How many sets of primers are needed for dna profiling?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!