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
Naddika [18.5K]
4 years ago
7

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.

You might be interested in
A learning process that can occur only during a limited period of the individual's development is called _____.
likoan [24]
This process is called as imprinting. It occurs at a particular stage of life and is, therefore, a phase-sensitive learning process. It can be of many types, including filial imprinting, where an offspring gains some of its behavioral characteristics from the parent, or sexual imprinting, through which desirable characteristics of a mate are recognized by a young animal. 
8 0
3 years ago
Question 2<br> The solid portion of Earth is made up of oxygen and this element is _____.
jarptica [38.1K]

Explanation:

Tarbuck, Earth's crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percent

About 29% of Earth's surface is land consisting of continents and islands. The remaining 71% is covered with water, mostly by oceans but also lakes, rivers and other fresh water, which all together constitute the hydrosphere.

...

Earth.

Almost 99% of the minerals making up the Earth's crust are made up of just eight elements. Most of these elements are found combined with other elements as compounds.

6 0
3 years ago
How do energetic considerations affect the structure of populations? communities? ecosystems?
alexandr402 [8]
<span>10% rule (efficiency between trophic levels): limits how long an ecosystem's food chain can be
Predator/prey cost benefit analysis (i.e. foraging) -- cost is risk of being eaten or killed along the way, benefit is energy/nourishment obtained: limits distribution of predator v. prey
Immigration/Emigration with other populations and ecosystems
Island biogeography: size of land and distance from another population/ecosystem (mainland): limits population size and variability on island</span>
3 0
3 years ago
Suggest why a glass tank with water was placed ​
fredd [130]

Answer:

The two layers of glass provides protection from the heat of the lamp, and the water level moves down rapidly as the gas is collected.

This is the Answer for your question :3

I hope you are having a great day ❤️❤️❤️

4 0
3 years ago
Match the type of of evidence for evolution with the correct example. analogous structures vestigial structures homologous struc
gogolik [260]

• Homologous structures: Both Ostriches have wings similar in form to those of their ancestors, but that do not allow the birds to fly.

Homologous structures are those that have structural similarities but are different in function. For example, if we look at the anatomical structure of a bird’s wing, it is very similar in structure with a human arm. However, over the course of time they have evolved to perform different functions.

• Vestigial structures: The inner ear bones of mammals have evolved from bones that form the jaws of reptiles.  

Vestigiality refers to the process in which some structure lose their function over the course of evolution in some specie but they are functionally normal in other species.  Such a structure is the inner ear bones of mammals which donot perform an important function in mammals but do perform in reptiles.

• DNA sequence data: Both Genes involved in RNA replication are conserved among bacteria and animals, suggesting a common evolutionary origin.

The sequencing of genetic data is an excellent method of finding the evolutionary histories and relatedness of different organisms. This field of sciences is called phylogenetics and the mentioned example is the result of phylogenetics.

• Analogous structures: The jointed legs of insects and vertebrates arose independently, indicating a different evolutionary origin.  

Analogous structures are those that have similar function but they look very different in structure or anatomy. This is because they have been evolved from different ancestors and perform different functions. One example of these structures is mentioned, The jointed legs of insects and vertebrates that look different bur perform same function.


7 0
4 years ago
Other questions:
  • Which vitamin aids in the conversion of tryptophan to niacin?
    14·1 answer
  • Give two processes witch occur during interphase and witch are necessary for mitosis to take place
    9·1 answer
  • In which section of the nephron does the filtrate have a higher osmolarity than the blood when it enters and lower osmolarity th
    7·1 answer
  • What was the main new invention of the Neolithic Revolution?​
    8·1 answer
  • A stroke in the primary motor area has caused don to lose control over his skeletal muscles on the right side of his body. what
    9·1 answer
  • Why are mitochondria called the power house of the cell
    7·1 answer
  • What three cell part act like an assembly line to produce and distribute proteins?
    13·1 answer
  • Nuclear envelope forms at each pole, spindle dissolves, chromosome uncoil occur during?
    15·1 answer
  • hummingbirds have small, weak feet and rely on their strong wings to move from one place to another. Describe how a disease affe
    11·1 answer
  • Two functions of the anther and why it attracts insects.​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!