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
Norma-Jean [14]
3 years ago
6

The cycads, a mostly tropical phylum of gymnosperms, evolved about 300 million years ago and were dominant forms during the age

of the dinosaurs. though their sperm are flagellated, their ovules are pollinated by beetles. these beetles get nutrition (they eat pollen) and shelter from the microsporophylls. upon visiting megasporophylls, the beetles transfer pollen to the exposed ovules. in cycads, pollen cones and seed cones are borne on different plants. cycads synthesize neurotoxins, especially in the seeds, that are effective against most animals, including humans.
which feature of cycads distinguishes them from most other gymnosperms?
1. they have exposed ovules.
2. they have flagellated sperm.
3. they are pollinated by animals.
1 only
2 only
3 only
2 & 3
1, 2 & 3
Biology
1 answer:
bagirrra123 [75]3 years ago
6 0

Answer:

gshsjdjddidjdjfjdjdjdjdjdjrjr

You might be interested in
What type of circulatory system do earthworms have?
Irina-Kira [14]

Answer:

a closed circulatory system.

Explanation:

an earthworm circulates blood exclusively through vessels.

6 0
2 years ago
Read 2 more answers
A nurse is evaluating the client's understanding of post cataract surgery instructions. the client needs further education when
Ymorist [56]
The answer to this question should be: <span>"i can return to my normal activities like cleaning my house and vacuuming"

A post cataract surgery patient will be prone to an airborne allergen such as dust so it is not recommended to do any cleaning or be in a place with much dust. Vacuuming will increase the amount of the dust in the room and this might cause damage to the patient eye.</span>
3 0
3 years ago
Read 2 more answers
Meiosis is called reduction division. When does the reduction in chromosome number occur?
aniked [119]

The reduction in chromosome number occurs during <u>meiosis I.</u>

Chromosomes are long molecules of DNA that contain some or all of an organism's genetic material. In most chromosomes, very long, thin strands of DNA are coated with packaging proteins. In eukaryotic cells, the histones are the most important of these proteins.

Within the nucleus of all cells, DNA molecules are packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly wrapped many times around proteins called histones that support its structure.

Another type of cell division, meiosis, ensures that humans have the same number of chromosomes from generation to generation. This is a two-step process in which the number of chromosomes is halved from 46 to 23 to form sperm and eggs.

Learn more about chromosomes here:-brainly.com/question/11912112

#SPJ4

7 0
1 year ago
Describe the reproductive process for viruses.
Reptile [31]
The virus attaches itself to a specific host cell (the cell in which it will reproduce) the virus injects its genetic material into the host cell. the host cell uses the genetic material to make new viruses. the host cell splits open, releasing the viruses.
4 0
3 years ago
What must have been true of unicellular organisms evolved into organisms in the domain eukarya apex?
Karolina [17]
Absorbing other cells gave a competitive advantage.
Hope this helps!<span />
6 0
3 years ago
Other questions:
  • Is DNA always wrapped around histones? Or is it just when it starts to condense into a chromosome?
    6·1 answer
  • Why does a<br> vestigial pelvis show that<br> the ancestors of the modern<br> whale once had legs?
    5·1 answer
  • What term did mendel used to signify his true breeding first generation?
    8·1 answer
  • What effect on the rate would you expect if you raised the temperature?
    10·1 answer
  • Which of the following is a biological catalyst?
    7·2 answers
  • Why are elbow and knees Called hinge joint?<br> What are some disorders that can occur in joint
    10·1 answer
  • WILL SOMEBODY PLEASEEEEEEEE ANSWER SOME OF MY BIOLOGY QUESTIONS! IVE BEEN ASKING SINCE YESTERDAY PEOPLE!!!!!!!!!!!!!!!!!!!!!!!!!
    12·2 answers
  • I didn’t mean to put D but what is the answer?!
    10·1 answer
  • What is the haploid number in sea otter?
    6·1 answer
  • An _______________ is a group of organisms and other non-living parts of the environment that lives in an area.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!