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2 years ago

Do pollen grains have the same number of chromosomes as a regular plant cell?

1 answer:

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The pollen grain is actually the male gametophyte generation of seed plants. Inside the anther, pollen mother cells divide by meiosis to form pollen grains whose nuclei contain half the number of chromosomes characteristic of the parent plant.

(hope that helped answer the question)

You might be interested in

Which statements are accurate about earthquakes that occur during the formation of a chain of islands and seamounts by a hotspot

Westkost [7]

Answer:

The following are accurate about earthquakes which occur during the formation of a chain of Islands and seamounts by hotspots:

- Earthquakes occur along fault lines within volcanoes formed by the hotspot.

- Earthquakes occur along fault lines during plate movements.

- Earthquakes occur when Earth’s crust bends under the weight of islands formed by the hotspot.

Explanation:

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2 years ago

Different cell types can react differently to epinephrine in the human body. Choose two cell types in the human body and briefly

Ipatiy [6.2K]

Answer:

I haven't really learned about cell types but I did find this information

Explanation:

How can epinephrine have different effects on different cells? Different cells have different receptors that bind epinephrine. Different cells activate different enzymes as a result of epinephrine binding.

epinephrine induces increased vascular smooth muscle contraction, pupillary dilator muscle contraction, and intestinal sphincter muscle contraction. Other significant effects include increased heart rate, myocardial contractility, and renin release

Hope it at least helps a little :)

3 0

2 years ago

The only way to tell if the red blood cells are crenated is to

Montano1993 [528]

Answer:

is to go for medical check-up

Explanation:

it's through the medical checkup

you will know that it still crenated

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2 years ago

Chytrids have some unique characteristics that are different from the other groups of fungi. What characteristics make them uniq

xeze [42]

Answer:

Their spores are produced in sac-shaped structures.

Their spores are produced in club-shaped structures.

Their reproductive cells have flagella.

Their reproductive cells have several nuclei.

They live in wet places.

They live in dry places.

Explanation:

The Chytridiomycota, often called chytrids, are unique among all fungi in having motile stages in their life cycles; no other fungi have this trait. These motile stages take the form of zoospores, single cells with a single posterior (at the rear) flagellum.

5 0

2 years ago

Read 2 more answers

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

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2 years ago