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4 years ago

Which of the following plants do NOT have swimming sperm?

Biology

1 answer:

Furkat [3]4 years ago

8 0

Answer:

None of these.

Explanation: The plants like cycads and ginkgos have swimming sperms. they need water to complete their life cycle.

There are many adaptations seen in the plants like liveworts, ferns and mosses in which they require water to complete its life cycle. This adaptation is not only restricted upto cyptograms. This can also be seen in the plants like ginkgos and cycads. Their sperms are very strange.

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Identify the tissues and write their main functions. <br><br>9 to 11 points

kati45 [8]

Answer:Either the cell wall or the membrane

Explanation:

The cell wall proctects the cell while the membrane forms structures inside of the cell

7 0

3 years ago

Plant cells often have a large membrane-bound sac that is used for storing water and other substances. what is the name of this

Anna007 [38]

Vacuole contains all the water it needs

6 0

4 years ago

snow_lady [41]

Answer:

Population size should be the correct answer

Explanation:

3 0

2 years ago

A certain first-order reaction a â†’ b is 25% complete in 42 min at 25Â°c. What is the half-life of the reaction?

yan [13]

Answer:

$t_{\frac{1}{2}} = 101.16$ minutes

Explanation:

For a First order reaction, the rate constant is determined by

$k = \frac{2.303}{t} log \frac{a}{a-x}$

Where

k= rate constant

t= time required for a reaction

a= initial concentration

x= amount of reactant decomposed in time t

a-x= amount of reactant left after time t

Let the initial concentration be $100$

Then

$x = 25\\a-x = 75$

Substituting the given values in above equation, we get -

$k = \frac{2.303}{42} log \frac{100}{75} \\$

$k = 6.85 *10^{-3}$

Also,

$k = \frac{0.693}{t_{\frac{1}{2}} } \\t_{\frac{1}{2}} = \frac{0.693}{6.85 *10^{-3}}\\$

$t_{\frac{1}{2}} = 101.16$ minutes

Read more on Brainly.in - https://brainly.in/question/6804668#readmore

7 0

4 years ago

Líquido circulante de los vertebrados

kogti [31]

La mayoría de los vertebrados y algunos invertebrados, como esta lombriz anélida, tienen un sistema circulatorio cerrado. (b) En los sistemas circulatorios abiertos, un líquido llamado hemolinfa se bombea a través de un vaso sanguíneo que desemboca en la cavidad corporal. La hemolinfa regresa al vaso sanguíneo a través de aberturas llamadas ostia.

más inteligente o gracias por favor :)) <3

3 0

3 years ago

Read 2 more answers